Rashba cavity QED: a route towards the superradiant quantum phase transition

P Nataf, T Champel, G Blatter, DM Basko - Physical review letters, 2019 - APS
We develop a theory of cavity quantum electrodynamics for a 2D electron gas in the
presence of Rashba spin-orbit coupling and perpendicular static magnetic field, coupled to …

Robust nodal structure of Landau level wave functions revealed by Fourier transform scanning tunneling spectroscopy

K Hashimoto, T Champel, S Florens, C Sohrmann… - Physical Review Letters, 2012 - APS
Scanning tunneling spectroscopy is used to study the real-space local density of states of a
two-dimensional electron system in a magnetic field, in particular within higher Landau …

High magnetic field theory for the local density of states in graphene with smooth arbitrary potential landscapes

T Champel, S Florens - Physical Review B—Condensed Matter and Materials …, 2010 - APS
We study theoretically the energy and spatially resolved local density of states (LDoS) in
graphene at high perpendicular magnetic field. For this purpose, we extend from the …

Probing Electron-Electron Interaction in Quantum Hall Systems<? format?> with Scanning Tunneling Spectroscopy

S Becker, C Karrasch, T Mashoff, M Pratzer… - Physical Review Letters, 2011 - APS
Using low-temperature scanning tunneling spectroscopy applied to the Cs-induced two-
dimensional electron system (2DES) on p-type InSb (110), we probe electron-electron …

Probing the nodal structure of Landau level wave functions in real space

JR Bindel, J Ulrich, M Liebmann, M Morgenstern - Physical Review Letters, 2017 - APS
The inversion layer of p-InSb (110) obtained by Cs adsorption of 1.8% of a monolayer is
used to probe the Landau level wave functions within smooth potential valleys by scanning …

Local density of states in disordered two-dimensional electron gases at high magnetic field

T Champel, S Florens - Physical Review B—Condensed Matter and Materials …, 2009 - APS
Motivated by high-accuracy scanning tunneling spectroscopy measurements on disordered
two-dimensional electron gases in strong magnetic field, we present an expression for the …

Spectral properties and local density of states of disordered quantum Hall systems with Rashba spin-orbit coupling

D Hernangómez-Pérez, J Ulrich, S Florens, T Champel - Physical Review B, 2013 - APS
We theoretically investigate the spectral properties and the spatial dependence of the local
density of states (LDOS) in disordered two-dimensional electron gases (2DEG) in the …

Transmission coefficient through a saddle-point electrostatic potential for graphene in the quantum Hall regime

M Flöser, S Florens, T Champel - Physical Review B—Condensed Matter and …, 2010 - APS
From the scattering of semicoherent-state wave packets at high magnetic field, we derive
analytically the transmission coefficient of electrons in graphene in the quantum Hall regime …

Shape of the Landau subbands in disordered graphene

W Zhu, HY Yuan, QW Shi, JG Hou, XR Wang - Physical Review B …, 2011 - APS
The question of why different experiments obtain different shapes of Landau subbands of
two-dimensional electron gases (2DEG's) is investigated. In particular, we consider …

Nonlocal correlations of the local density of states in disordered quantum Hall systems

T Champel, S Florens, ME Raikh - Physical Review B—Condensed Matter and …, 2011 - APS
Motivated by recent high-resolution scanning tunneling microscopy (STM) experiments in
the quantum Hall regime both on massive two-dimensional electron gas and on graphene …