High-energy Landau levels in graphene beyond nearest-neighbor hopping processes: Corrections to the effective Dirac Hamiltonian

KJU Vidarte, C Lewenkopf - Physical Review B, 2022 - APS
We study the Landau level spectrum of bulk graphene monolayers beyond the Dirac
Hamiltonian with linear dispersion. We consider an effective Wannier-like tight-binding …

Probing the extended-state width of disorder-broadened Landau levels in epitaxial graphene

K Takase, H Hibino, K Muraki - Physical Review B, 2015 - APS
We experimentally investigate the width of extended states in disorder-broadened Landau
levels (LLs) in top-gated epitaxial graphene on silicon carbide using two different methods …

The effects of the magnetopolaron on the energy gap opening in graphene

WP Li, ZW Wang, JW Yin, YF Yu - Journal of Physics: Condensed …, 2012 - iopscience.iop.org
The magnetopolaron is formed via electron–acoustic deformation phonon coupling in the
presence of a magnetic field in monolayer graphene. We find that an energy gap (EG) is …

Conductance fluctuations in graphene systems: The relevance of classical dynamics

L Ying, L Huang, YC Lai, C Grebogi - Physical Review B—Condensed Matter …, 2012 - APS
Conductance fluctuations associated with transport through quantum-dot systems are
currently understood to depend on the nature of the corresponding classical dynamics, ie …

Temperature effect of the bound magnetopolaron on the bandgap in monolayer graphene

XJ Ma, CH Jia, ZH Ding, Y Sun, JL Xiao - Superlattices and Microstructures, 2018 - Elsevier
Temperature effect of the bound magnetopolaron on the bandgap are discussed in
monolayer graphene (MG). The Lee-Low-Pine unitary variational method and linear …

Lattice relaxation of graphene under high magnetic field

ZW Wang, SS Li - Journal of Physics: Condensed Matter, 2012 - iopscience.iop.org
We investigate the n= 0 Landau level (LL) in monolayer graphene with high magnetic field.
We find that the energy gap is opened in the n= 0 LL by the magnetic-field-dependent lattice …

Polarization of graphene in a strong magnetic field beyond the Dirac cone approximation

S Yuan, R Roldan, MI Katsnelson - Solid state communications, 2012 - Elsevier
In this paper we study the excitation spectrum of graphene in a strong magnetic field,
beyond the Dirac cone approximation. The dynamical polarizability is obtained using a full π …

Two-phonon scattering in graphene in the quantum Hall regime

AM Alexeev, RR Hartmann, ME Portnoi - Physical Review B, 2015 - APS
One of the most distinctive features of graphene is its huge inter-Landau-level splitting in
experimentally attainable magnetic fields which results in the room-temperature quantum …

[PDF][PDF] The direct insulator-quantum Hall transition

CT Liang, ST Lo - Chinese Journal of Physics, 2014 - academia.edu
The simultaneous presence of a strong magnetic field B and disorder can result in many
fascinating physical phenomena. For instance, the integer quantum Hall effect (IQHE) is …

Effective tunnel conductance and effective ac conductivity of randomly strained graphene

RK Malla, ME Raikh - Physical Review B, 2018 - APS
We consider a single-layer graphene with high ripples, so that the pseudomagnetic fields
due to these ripples are strong. If the magnetic length corresponding to a typical …