Brian LeRoy

Interests

No activities entered.

Courses

Scholarly Contributions

Journals/Publications

• LeRoy, B. J. (2022). Direct STM Measurements of R- and H-type Twisted MoSe2/WSe2 Heterostructures. APL Materials, 10, 031107.
  More info

  When semiconducting transition metal dichalcogenides heterostructures arestacked the twist angle and lattice mismatch leads to a periodic moir\'epotential. As the angle between the layers changes, so do the electronicproperties. As the angle approaches 0- or 60-degrees interestingcharacteristics and properties such as modulations in the band edges, flatbands, and confinement are predicted to occur. Here we report scanningtunneling microscopy and spectroscopy measurements on the band gaps and bandmodulations in MoSe2/WSe2 heterostructures with near 0 degree rotation (R-type)and near 60 degree rotation (H-type). We find a modulation of the band gap forboth stacking configurations with a larger modulation for R-type than forH-type as predicted by theory. Furthermore, local density of states images showthat electrons are localized differently at the valence band and conductionband edges.[Journal_ref: APL Materials 10, 031107 (2022)]
• Mahdikhanysarvejahany, F., Shanks, D. N., Muccianti, C., Badada, B., Idi, I., Alfrey, A., Raglow, S., Koehler, M., Mandrus, D. G., Taniguchi, T., Watanabe, K., Monti Masel, O. L., Yu, H., LeRoy, B. J., & Schaibley, J. R. (2020). Temperature dependent moiré trapping of interlayer excitons in MoSe2-WSe2 heterostructures. npj 2D Materials and Applications, 5, 67. doi:10.1038/s41699-021-00248-7
  More info

  MoSe2-WSe2 heterostructures host strongly bound interlayer excitons (IXs) which exhibit bright photoluminescence (PL) when the twist-angle is near 0° or 60°. Over the past several years, there have been numerous reports on the optical response of these heterostructures but no unifying model to understand the dynamics of IXs and their temperature dependence. In this letter, we perform a comprehensive study of the temperature, excitation power, and time-dependent PL of IXs. We observe a significant decrease in PL intensity above a critical temperature that we attribute to a transition from localized to delocalized IXs. We conclude that this temperature dependence is a result of IX-IX interactions, which is suppressed by the moiré potential trapping IXs at low temperature. Astoundingly, we find a simple inverse relationship between the IX PL energy and the critical temperature, which exhibits opposite power dependent behaviors for near 0° and 60° samples.
• Shanks, D. N., Mahdikhanysarvejahany, F., Muccianti, C., Alfrey, A., Koehler, M. R., Mandrus, D. G., Taniguchi, T., Watanabe, K., Yu, H., LeRoy, B. J., & Schaibley, J. R. (2021). Nanoscale Trapping of Interlayer Excitons in a 2D Semiconductor Heterostructure. Nano letters, 21(13), 5641-5647.
  More info

  For quantum technologies based on single excitons and spins, the deterministic placement and control of a single exciton is a longstanding goal. MoSe-WSe heterostructures host spatially indirect interlayer excitons (IXs) that exhibit highly tunable energies and unique spin-valley physics, making them promising candidates for quantum information processing. Previous IX trapping approaches involving moiré superlattices and nanopillars do not meet the quantum technology requirements of deterministic placement and energy tunability. Here, we use a nanopatterned graphene gate to create a sharply varying electric field in close proximity to a MoSe-WSe heterostructure. The dipole interaction between the IX and the electric field creates an ∼20 nm trap. The trapped IXs show the predicted electric-field-dependent energy, saturation at low excitation power, and increased lifetime, all signatures of strong spatial confinement. The demonstrated architecture is a crucial step toward the deterministic trapping of single IXs, which has broad applications to scalable quantum technologies.
• Yu, H., Watanabe, K., Taniguchi, T., Shanks, D. N., Schaibley, J. R., Muccianti, C., Mandrus, D. G., Mahdikhanysarvejahany, F., Leroy, B. J., Koehler, M. R., & Alfrey, A. (2021). Nanoscale Trapping of Interlayer Excitons in a 2D Semiconductor Heterostructure.. Nano letters, 21(13), 5641-5647. doi:10.1021/acs.nanolett.1c01215
  More info

  For quantum technologies based on single excitons and spins, the deterministic placement and control of a single exciton is a longstanding goal. MoSe2-WSe2 heterostructures host spatially indirect interlayer excitons (IXs) that exhibit highly tunable energies and unique spin-valley physics, making them promising candidates for quantum information processing. Previous IX trapping approaches involving moiré superlattices and nanopillars do not meet the quantum technology requirements of deterministic placement and energy tunability. Here, we use a nanopatterned graphene gate to create a sharply varying electric field in close proximity to a MoSe2-WSe2 heterostructure. The dipole interaction between the IX and the electric field creates an ∼20 nm trap. The trapped IXs show the predicted electric-field-dependent energy, saturation at low excitation power, and increased lifetime, all signatures of strong spatial confinement. The demonstrated architecture is a crucial step toward the deterministic trapping of single IXs, which has broad applications to scalable quantum technologies.
• LeRoy, B. J. (2020). Coupled 2D Semiconductor-Molecular Excitons with Enhanced Raman Scattering. The Journal of Physical Chemistry C, 124, 27637-27644. doi:https://doi.org/10.1021/acs.jpcc.0c06544
  More info

  Two-dimensional (2D) material–organic interfaces offer a platform to realize hybrid materials with tunable optical properties that are determined by the interactions between the disparate materials. This is particularly attractive for tailoring the optoelectronic properties of semiconducting monolayer transition metal dichalcogenides (TMDs). Here, we demonstrate evidence of coupled 2D semiconductor–molecular excitons with enhanced optical properties, which results from the atomically thin heterojunction. Specifically, we investigate the hybridization of the 2.16 eV WSe2 B exciton with the 2.20 eV transition of perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA), observed by enhanced resonant Raman scattering by the PTCDA vibrational modes, with enhancements by a factor of nearly 20. The effect can be understood from a coupled oscillator model in which the strong absorption resonance of the WSe2 monolayer increases the Raman scattering efficiency of the PTCDA. The Raman enhancement diminishes with increasing WSe2 thickness, which is attributed to a reflectivity effect that reduces the intensity at the surface. The proposed hybridization effect may lead to new investigations into the nature of coupled excitons in atomically thin junctions.
• LeRoy, B. J. (2020). Flat bands in twisted bilayer transition metal dichalcogenides. Nature Physics, 16, 1093-1096. doi:https://doi.org/10.1038/s41567-020-0958-x
  More info

  The crystal structure of a material creates a periodic potential that electrons move through giving rise to its electronic band structure. When two-dimensional materials are stacked, the resulting moiré pattern introduces an additional periodicity so that the twist angle between the layers becomes an extra degree of freedom for the resulting heterostructure. As this angle changes, the electronic band structure is modified leading to the possibility of flat bands with localized states and enhanced electronic correlations. In transition metal dichalcogenides, flat bands have been theoretically predicted to occur for long moiré wavelengths over a range of twist angles around 0° and 60° giving much wider versatility than magic-angle twisted bilayer graphene. Here, we show the existence of a flat band in the electronic structure of 3° and 57.5° twisted bilayer WSe2 samples using scanning tunnelling spectroscopy. Our direct spatial mapping of wavefunctions at the flat-band energy show that the localization of the flat bands is different for 3° and 57.5°, in agreement with first-principles density functional theory calculations.
• LeRoy, B. J. (2020). Local characterization and engineering of proximitized correlated states in graphene-NbSe$_2$ vertical heterostructures. Phys. Rev. B, 102, 085429. doi:https://doi.org/10.1103/PhysRevB.102.085429
  More info

  Using a van der Waals vertical heterostructure consisting of monolayergraphene, monolayer hBN and NbSe$_2$, we have performed local characterizationof induced correlated states in different configurations. At a temperature of4.6 K, we have shown that both superconductivity and charge density waves canbe induced in graphene from NbSe2 by proximity effects. By applying a verticalmagnetic field, we imaged the Abrikosov vortex lattice and extracted thecoherence length for the proximitized superconducting graphene. We further showthat the induced correlated states can be completely blocked by adding amonolayer hBN between the graphene and the NbSe$_2$, which demonstrates theimportance of the tunnel barrier and surface conditions between the normalmetal and superconductor for the proximity effect.[Journal_ref: Phys. Rev. B 102, 085429 (2020)]
• LeRoy, B. J. (2020). Probing the wavefunctions of correlated states in magic angle graphene. Phys. Rev. Research, 2, 033181. doi:https://doi.org/10.1103/PhysRevResearch.2.033181
  More info

  Using scanning probe microscopy and spectroscopy, we explore the spatialsymmetry of the electronic wavefunctions of twisted bilayer graphene at the"magic angle" of 1.1 degrees. This small twist angle leads to a long wavelengthmoir\'e unit cell on the order of 13 nm and the appearance of two flat bands.As the twist angle is decreased, correlation effects increase until they aremaximized at the magic angle. At this angle, the wavefunctions at the chargeneutrality point show only C2 symmetry due to the emergence of a charge orderedstate. As the system is doped, the symmetry of the wavefunctions change at eachcommensurate filling of the moir\'e unit cell pointing to the correlated natureof the spin and valley degeneracy broken states.[Journal_ref: Phys. Rev. Research 2, 033181 (2020)]
• LeRoy, B. J. (2021). Role of defects and phonons in bandgap dynamics of monolayer WS2 at high carrier densities. Journal of Physics: Materials, 4, 015005. doi:https://doi.org/10.1088/2515-7639/abc13b
  More info

  We conduct ultrafast pump-probe spectroscopy in monolayer WS2 at high pump fluences to gain direct insight into interactions between a high density of carriers, defects, and phonons. We find that defects in the lattice play a major role in determining the relaxation dynamics by trapping the photoexcited carriers and acting as non-radiative recombination centers that emit phonons. In the high carrier density regime explored in our experiments, we observe substantial changes in the transient absorbance signal at unexpectedly long-time delays which we attribute to phonon-induced band gap modification. Our probe frequency dependent measurements and modeling indicate a renormalization of the bandgap by up to 23 meV. These results highlight the importance of defects and phonons for optical applications of monolayer transition metal dichalcogenides.
• LeRoy, B. J. (2019). van der Waals heterostructures combining graphene and hexagonal boron nitride. Nature Reviews Physics, 1(2), 112-125. doi:https://doi.org/10.1038/s42254-018-0016-0
• Huang, S., Kim, K., Efimkin, D. K., Lovorn, T., Taniguchi, T., Watanabe, K., MacDonald, A. H., Tutuc, E., & LeRoy, B. J. (2018). Topologically Protected Helical States in Minimally Twisted Bilayer Graphene. PHYSICAL REVIEW LETTERS, 121(3).
• LeRoy, B. J., & Robinson, J. A. (2018). Preface for Special Topic: 2D Materials: Growth and characterization. APL MATERIALS, 6(2).
• Newhouse-Illige, T., Xu, Y. H., Liu, Y. H., Huang, S., Kato, H., Bi, C., Xu, M., LeRoy, B. J., & Wang, W. G. (2018). Temperature dependence of interlayer coupling in perpendicular magnetic tunnel junctions with GdOX barriers. APPLIED PHYSICS LETTERS, 112(7).
• Golla, D., Brasington, A., LeRoy, B. J., & Sandhu, A. (2017). Ultrafast Phonon Dynamics in Graphene-hBN Structures. 2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO).
• Golla, D., Brasington, A., LeRoy, B. J., & Sandhu, A. (2017). Ultrafast relaxation of hot phonons in graphene-hBN heterostructures. APL MATERIALS, 5(5).
• Huang, S., Yankowitz, M., Chattrakun, K., Sandhu, A., & LeRoy, B. J. (2017). Evolution of the electronic band structure of twisted bilayer graphene upon doping. SCIENTIFIC REPORTS, 7.
• Kim, K., DaSilva, A., Huang, S., Fallahazad, B., Larentis, S., Taniguchi, T., Watanabe, K., LeRoy, B. J., MacDonald, A. H., & Tutuc, E. (2017). Tunable moire bands and strong correlations in small-twist-angle bilayer graphene. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 114(13), 3364-3369.
• Sandhu, A. S., LeRoy, B. J., Huang, S., & Yankowitz, M. (2017). Evolution of the electronic band structure of twisted bilayer graphene upon doping. Scientific Reports, 7, 7611.
• Kim, K., Yankowitz, M., Fallahazad, B., Kang, S., Movva, H., Huang, S., Larentis, S., Corbet, C. M., Taniguchi, T., Watanabe, K., Banerjee, S. K., LeRoy, B. J., & Tutuc, E. (2016). van der Waals Heterostructures with High Accuracy Rotational Alignment. NANO LETTERS, 16(3), 1989-1995.
• Lin, Z., McCreary, A., Briggs, N., Subramanian, S., Zhang, K., Sun, Y., Li, X., Borys, N. J., Yuan, H., Fullerton-Shirey, S. K., Chernikov, A., Zhao, H., McDonnell, S., Lindenberg, A. M., Xiao, K., LeRoy, B. J., Drndic, M., Hwang, J., Park, J., , Chhowalla, M., et al. (2016). 2D materials advances: from large scale synthesis and controlled heterostructures to improved characterization techniques, defects and applications. 2D MATERIALS, 3(4).
• Yankowitz, M., Watanabe, K., Taniguchi, T., San-Jose, P., & LeRoy, B. J. (2016). Pressure-induced commensurate stacking of graphene on boron nitride. NATURE COMMUNICATIONS, 7.
• Yankowitz, M., Larentis, S., Kim, K., Xue, J., McKenzie, D., Huang, S., Paggen, M., Ali, M. N., Cava, R. J., Tutuc, E., & LeRoy, B. J. (2015). Intrinsic Disorder in Graphene on Transition Metal Dichalcogenide Heterostructures. NANO LETTERS, 15(3), 1925-1929.
• Yankowitz, M., McKenzie, D., & LeRoy, B. J. (2015). Local Spectroscopic Characterization of Spin and Layer Polarization in WSe2. PHYSICAL REVIEW LETTERS, 115(13).
• LeRoy, B. J., & Yankowitz, M. (2014). Emergent complex states in bilayer graphene. SCIENCE, 345(6192), 31-32.
• Roberts, A. T., Binder, R., Kwong, N. H., Golla, D., Cormode, D., LeRoy, B. J., Everitt, H. O., & Sandhu, A. (2014). Optical Characterization of Electron-Phonon Interactions at the Saddle Point in Graphene. PHYSICAL REVIEW LETTERS, 112(18).
• Roberts, A., Binder, R., Kwong, N. H., Golla, D., Cormode, D., LeRoy, B. J., Everitt, H. O., & Sandhu, A. (2014). Probing Electron-Phonon Interactions at the Saddle Point in Graphene. 2014 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO).
• Roberts, A., Binder, R., Kwong, N., Golla, D., Cormode, D., LeRoy, B., Everitt, H., & Sandhu, A. (2014). Optical characterization of electron-phonon interactions at the saddle point in graphene. Physical Review Letters, 112, 187401.
• Yankowitz, M., Wang, J. I., Birdwell, A. G., Chen, Y., Watanabe, K., Taniguchi, T., Jacquod, P., San-Jose, P., Jarillo-Herrero, P., & LeRoy, B. J. (2014). Electric field control of soliton motion and stacking in trilayer graphene. NATURE MATERIALS, 13(8), 786-789.
• Yankowitz, M., Wang, J. I., Li, S., Birdwell, A. G., Chen, Y., Watanabe, K., Taniguchi, T., Quek, S. Y., Jarillo-Herrero, P., & LeRoy, B. J. (2014). Band structure mapping of bilayer graphene via quasiparticle scattering. APL MATERIALS, 2(9), 092503.
  More info

  A perpendicular electric field breaks the layer symmetry of Bernal-stacked bilayer graphene, resulting in the opening of a band gap and a modification of the effective mass of the charge carriers. Using scanning tunneling microscopy and spectroscopy, we examine standing waves in the local density of states of bilayer graphene formed by scattering from a bilayer/trilayer boundary. The quasiparticle interference properties are controlled by the bilayer graphene band structure, allowing a direct local probe of the evolution of the band structure of bilayer graphene as a function of electric field. We extract the Slonczewski-Weiss-McClure model tight binding parameters as gamma(0) = 3.1 eV, gamma(1) = 0.39 eV, and y4 = 0.22 eV. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
• Yankowitz, M., Wang, J., Birdwell, A., Chen, Y., Watanabe, K., Taniguchi, T., Jacquod, P., San-Jose, P., Jarillo-Herrero, P., & LeRoy, B. (2014). Electric field control of soliton motion and stacking in trilayer graphene. Nature Materials, 13, 786-789.
  More info

  doi:10.1038/nmat3965
• Yankowitz, M., Xue, J., & LeRoy, B. (2014). Graphene on hexagonal boron nitride. Journal of Physics: Condensed Matter, 26, 303201.
• Chattrakun, K., Huang, S., Watanabe, K., Taniguchi, T., Sandhu, A., & LeRoy, B. (2013). Gate dependent Raman spectroscopy of graphene on boron nitride. Journal of Physics: Condensed Matter, 25, 505304.
• Golla, D., Chattrakun, K., Watanabe, K., Taniguchi, T., LeRoy, B., & Sandhu, A. (2013). Optical thickness determination of hexagonal boron nitride flakes. Applied Physics Letters, 102, 161906.
• Hunt, B., Sanchez-Yamagishi, J., Young, A., Yankowitz, M., LeRoy, B., Watanabe, K., Taniguchi, T., Moon, P., Koshino, M., Jarillo-Herrero, P., & Ashoori, R. (2013). Massive Dirac fermions and Hofstadter butterfly in a van der Waals heterostructure. Science, 340, 1427-1430.
• Yankowitz, M., Wang, F., Lau, C., & LeRoy, B. (2013). Local spectroscopy of the electrically tunable band gap in trilayer graphene. Physical Review B, 87, 165102.
• Leroy, B., Xue, J., Sanchez-Yamagishi, J., Watanabe, K., Taniguchi, T., Jarillo-Herrero, P., & Leroy, B. J. (2012). Long-wavelength local density of states oscillations near graphene step edges. Physical review letters, 108(1).
  More info

  Using scanning tunneling microscopy and spectroscopy, we have studied the local density of states (LDOS) of graphene over step edges in boron nitride. Long-wavelength oscillations in the LDOS are observed with maxima parallel to the step edge. Their wavelength and amplitude are controlled by the energy of the quasiparticles allowing a direct probe of the graphene dispersion relation. We also observe a faster decay of the LDOS oscillations away from the step edge than in conventional metals. This is due to the chiral nature of the Dirac fermions in graphene.
• Xue, J., Sanchez-Yamagishi, J., Watanabe, K., Taniguchi, T., Jarillo-Herrero, P., & LeRoy, B. (2012). Long wavelength local density of states oscillations near graphene step edges. Physical Review Letters, 108, 16801.
• Yankowitz, M., Xue, J., Cormode, D., Sanchez-Yamagishi, J., Watanabe, K., Taniguchi, T., Jarillo-Herrero, P., Jacquod, P., & LeRoy, B. (2012). Emergence of superlattice Dirac points in graphene on hexagonal boron nitride. Nature Physics, 8, 382.
• Leroy, B., Deshpande, A., & Leroy, B. J. (2010). Smoothing the ripples. Chemphyschem : a European journal of chemical physics and physical chemistry, 11(9).

Presentations

• LeRoy, B. J. (2021, 08). Designer electronic states in van der Waals heterostructures. ORNL Quantum Materials WorkshopOak Ridge National Laboratory.
• LeRoy, B. J. (2021, May). Designer electronic states in van der Waals heterostructures. USA-Australia Transpacific Colloquium, Monash University.
• LeRoy, B. J. (2020, Feb.). Imaging electronic states in van der Waals heterostructures. Army Research Office Annual Review.
• LeRoy, B. J. (2020, Jan.). Designer electronic states in van der Waals heterostructures. Seminar at Argonne National Laboratory.
• LeRoy, B. J. (2019, August). Designer electronic states in van der Waals heterostructures. University of South Florida Colloquium.
• LeRoy, B. J. (2019, March). Topologically Protected Helical States in Minimally Twisted Bilayer Graphene. APS March Meeting. Boston, MA.
• LeRoy, B. J. (2019, October). Designer electronic states in van der Waals heterostructures. Penn State Colloquium.
• LeRoy, B. J. (2018, 09). Imaging electronic states in van der Waals heterostructures. APS Four Corners Meeting.
• LeRoy, B. J. (2018, 10). Topologically protected states in van der Waals heterostructures. Harvard/MIT Center for Integrated Quantum Materials Seminar. Harvard.
• LeRoy, B. J. (2018, 10). Topologically protected states in van der Waals heterostructures. UC Santa Cruz Physics colloquium. UC-Santa Cruz.
• LeRoy, B. J. (2017, 03). Scanning Tunneling Microscopy and Spectroscopy of Twisted Bilayer Graphene with Small Twist Angles. APS March Meeting.
• LeRoy, B. J. (2017, 09). Topologically protected states in van der Waals heterostructures. Arizona Physics Colloquium. University of Arizona.
• LeRoy, B. J. (2017, 09). Topologically protected states in van der Waals heterostructures. Utah Condensed Matter Seminar. University of Utah.
• LeRoy, B. J. (2017, 10). Imaging electronic states in van der Waals heterostructures. Caltech Materials Science Colloquium. Caltech University.
• Hao, Q., LeRoy, B. J., & Du, X. (2016, Nov.). Thermoelectric Property Measurements of Graphene Antidot Lattices on Different Substrates. ASME’s IMECE Conference. Phoenix, AZ: ASME.
• LeRoy, B. J. (2016, May). Imaging and Spectroscopy of van der Waals Heterostructures. Penn State 2D Layered Materials Workshop.
• LeRoy, B. J. (2015, April). Imaging and Spectroscopy of Graphene Heterostructures. University of Maryland Condensed Matter Seminar.
• LeRoy, B. J. (2015, January). Imaging the Electronic Properties of van der Waals Heterostructures. University of Arizona Colloquium.
• LeRoy, B. J. (2015, March). Electronic Band Structure Modification upon Doping in Twisted Bilayer Graphene. APS March Meeting.
  More info

  Talk given by graduate student, Shengqiang Huang
• LeRoy, B. J. (2015, March). Intrinsic disorder in graphene on transition metal dichalcogenide heterostructures. APS March Meeting.
  More info

  Talk given by graduate student, Matthew Yankowitz
• LeRoy, B. J. (2015, November). Imaging and Spectroscopy of van der Waals Heterostructures. Aalto University Colloquium.
• LeRoy, B. J. (2015, October). Imaging and Spectroscopy of Graphene Heterostructures. AVS Symposium.
• LeRoy, B. J. (2015, September). Imaging and Spectroscopy of Graphene Heterostructures. University of Pennsylvania Colloquium.
• Leroy, B. J. (2014, April). Imaging Electronic Properties of Two-Dimensional Materials. Optical Sciences Colloquium. Tucson AZ: University of Arizona.
• Leroy, B. J. (2014, June). Imaging and spectroscopy of graphene heterostructures. European Workshop on Epitaxial Graphene and 2D Materials. Primosten Croatia.
• Leroy, B. J. (2014, March). Imaging and spectroscopy of graphene heterostructures. March Meeting of the American Physical Society. Denver CO.
• Leroy, B. J. (2014, September). Imaging and Spectroscopy of Graphene Heterostructures. University of Texas.
• Leroy, B. J. (2014, September). Imaging the Electronic Properties of Graphene. University of Texas.
• Leroy, B. J. (2013, April). Electronic properties of graphene on boron nitride. Spring Meeting of the Materials Research Society. San Francisco CA.
• Leroy, B. J. (2013, January). Imaging local electronic properties of graphene. Physics Colloquium. Melbourne Australia: Monash University.
• Leroy, B. J. (2013, June). Electronic properties of graphene on boron nitride. CECAM-Workshop. Breman Germany.
• Leroy, B. J. (2013, October). Local electronic properties of graphene. AVS Symposium. Long Beach CA.
• Leroy, B. J. (2013, September). Electronic properties of graphene on boron nitride. DyProSo XXXIV Conference. Vienna Austria.
• Leroy, B. J. (2012, January). Imaging local electronic properties of graphene. 39th Conference on the Physics and Chemistry of Surfaces and Interfaces (PCSI-39). Santa Fe NM.
• Leroy, B. J. (2012, January). Scanning tunneling spectroscopy of graphene on boron nitride. Fundamental Aspects of Graphene and Other Carbon Allotropes, KITP Workshop. Santa Barbara CA.
• Leroy, B. J. (2012, June). Imaging local electronic properties of carbon nanostructures. Molecular Electronic Devices Seminar. Delft The Netherlands: Delft University of Technology.
• Leroy, B. J. (2012, June). Imaging local electronic properties of graphene. Condensed Matter Seminar. Geneva Switzerland: University of Geneva.
• Leroy, B. J. (2012, June). Scanning tunneling spectroscopy of graphene on BN. Graphene Week 2012 Conference. Delft The Netherlands.
• Leroy, B. J. (2012, March). STM of graphene on boron nitride. March Meeting of the American Physical Society. Boston MA.
• Leroy, B. J. (2012, May). Imaging local electronic properties of graphene. Condensed Matter Seminar. College Park MD: University of Maryland.

Reviews

• Yankowitz, M., Xue, J., & LeRoy, B. J. (2014. Graphene on hexagonal boron nitride.
• Deshpande, A., & LeRoy, B. (2012. Scanning probe microscopy of graphene(pp 743-759).
  More info

  Volume: 44

Others

• Hersam, M. C., & LeRoy, B. J. (2014, SEP). Preface to Special Topic: Two-Dimensional Materials. APL MATERIALS.