Emergent dirac gullies and gully-symmetry-breaking quantum hall states in ABA trilayer graphene

A. Zibrov, R. Peng, C. Kometter, J. Li, C. Dean, T. Taniguchi, K. Watanabe, M. Serbyn, A. Young, Physical Review Letters 121 (2018) 167601.


Journal Article | Published | English
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Abstract
We report on quantum capacitance measurements of high quality, graphite- and hexagonal boron nitride encapsulated Bernal stacked trilayer graphene devices. At zero applied magnetic field, we observe a number of electron density- and electrical displacement-tuned features in the electronic compressibility associated with changes in Fermi surface topology. At high displacement field and low density, strong trigonal warping gives rise to emergent Dirac gullies centered near the corners of the hexagonal Brillouin and related by three fold rotation symmetry. At low magnetic fields of B=1.25~T, the gullies manifest as a change in the degeneracy of the Landau levels from two to three. Weak incompressible states are also observed at integer filling within these triplets Landau levels, which a Hartree-Fock analysis indicates are associated with Coulomb-driven nematic phases that spontaneously break rotation symmetry.
Publishing Year
Date Published
2018-10-15
Journal Title
Physical Review Letters
Acknowledgement
The experimental work at UCSB was funded by the National Science Foundation under Grant No. DMR- 1654186. Work at Columbia was supported by the National Science Foundation under Grant No. DMR- 1507788. K. W. and T. T. acknowledge support from the Elemental Strategy Initiative conducted by the Ministry of Education, Culture, Sports, Science and Technology, Japan, and the Japan Society for the Promotion of Science KAKENHI Grant No. JP15K21722. E. M. S. acknowledges the support of the Elings Fellowship from the California Nanosystems Institute at the University of California, Santa Barbara. A. F. Y. acknowledges the support of the David and Lucile Packard foundation and the Sloan Foundation. Measurements made use of a dilution refrigerator funded through the Major Research Instrumentation program of the U.S. National Science Foundation under Grant No. DMR- 1531389, and the MRL Shared Experimental Facilities, which are supported by the MRSEC Program of the U.S. National Science Foundation under Grant No. DMR- 1720256.
Volume
121
Issue
16
Article Number
167601
IST-REx-ID

Cite this

Zibrov A, Peng R, Kometter C, et al. Emergent dirac gullies and gully-symmetry-breaking quantum hall states in ABA trilayer graphene. Physical Review Letters. 2018;121(16):167601. doi:10.1103/PhysRevLett.121.167601
Zibrov, A., Peng, R., Kometter, C., Li, J., Dean, C., Taniguchi, T., … Young, A. (2018). Emergent dirac gullies and gully-symmetry-breaking quantum hall states in ABA trilayer graphene. Physical Review Letters, 121(16), 167601. https://doi.org/10.1103/PhysRevLett.121.167601
Zibrov, Alexander, Rao Peng, Carlos Kometter, Jia Li, Cory Dean, Takashi Taniguchi, Kenji Watanabe, Maksym Serbyn, and Andrea Young. “Emergent Dirac Gullies and Gully-Symmetry-Breaking Quantum Hall States in ABA Trilayer Graphene.” Physical Review Letters 121, no. 16 (2018): 167601. https://doi.org/10.1103/PhysRevLett.121.167601.
A. Zibrov et al., “Emergent dirac gullies and gully-symmetry-breaking quantum hall states in ABA trilayer graphene,” Physical Review Letters, vol. 121, no. 16, p. 167601, 2018.
Zibrov A, Peng R, Kometter C, Li J, Dean C, Taniguchi T, Watanabe K, Serbyn M, Young A. 2018. Emergent dirac gullies and gully-symmetry-breaking quantum hall states in ABA trilayer graphene. Physical Review Letters. 121(16), 167601.
Zibrov, Alexander, et al. “Emergent Dirac Gullies and Gully-Symmetry-Breaking Quantum Hall States in ABA Trilayer Graphene.” Physical Review Letters, vol. 121, no. 16, American Physical Society, 2018, p. 167601, doi:10.1103/PhysRevLett.121.167601.

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