Predin, Sonja and Wenk, Paul and Schliemann, John (2016) Trigonal warping in bilayer graphene: Energy versus entanglement spectrum. PHYSICAL REVIEW B, 93 (11): 115106. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We present a mainly analytical study of the entanglement spectrum of Bernal-stacked graphene bilayers in the presence of trigonal warping in the energy spectrum. Upon tracing out one layer, the entanglement spectrum shows qualitative geometric differences to the energy spectrum of a graphene monolayer. However, topological quantities such as Berry-phase-type contributions to Chern numbers agree. The latter analysis involves not only the eigenvalues of the entanglement Hamiltonian but also its eigenvectors. We also discuss the entanglement spectra resulting from tracing out other sublattices. As a technical basis of our analysis, we provide closed analytical expressions for the full eigensystem of bilayer graphene in the entire Brillouin zone with a trigonally warped spectrum.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ENTROPY; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group John Schliemann |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 12 Mar 2019 06:24 |
| Last Modified: | 12 Mar 2019 06:24 |
| URI: | https://pred.uni-regensburg.de/id/eprint/2269 |
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