Concept

Landau quantization

Related publications (47)

Growth of High-Mobility Bi2Te2Se Nanoplatelets on hBN Sheets by van der Waals Epitaxy

Klaus Kern, Marko Burghard, Pascal Gehring

The electrical detection of the surface states of topological insulators is strongly impeded by the interference of bulk conduction, which commonly arises due to pronounced doping associated with the formation of lattice defects. As exemplified by the topo ...

Amer Chemical Soc2012

Excitation energy dependent charge separation at hole-transporting dye/TiO2 hetero interface

Ulf Anders Hagfeldt

Interfacial charge sepn. in hybrid solar cells depends on both the energetic alignment and electronic coupling between the inorg. and org. semiconducting materials at the hetero interface. In the present work, bilayer solar cells comprising the small mol. ...

2012

Large Band Gap Opening between Graphene Dirac Cones Induced by Na Adsorption onto an Ir Superlattice

Harald Brune, Stefano Rusponi, Markus Etzkorn, Daniela Pacilè, Sergio Vlaic

We investigate the effects of Na adsorption on the electronic structure of bare and Ir cluster superlattice-covered epitaxial graphene on Ir(111) using angleresolved photoemission spectroscopy and scanning tunneling microscopy. At Na saturation coverage, a ...

2012

Electronic structure of Zn, Cu and Ni impurities in germanium

Alexandra Sarabando de Carvalho

We present a density functional modelling study of Zn, Cu and Ni impurities in hydrogen-terminated germanium clusters. Their electronic structure is investigated in detail, especially their Jahn-Teller instabilities and electrical levels. Interstitial and ...

2011

De Haas-van Alphen effect and energy gaps of a correlated two-dimensional electron system in an AlAs two-valley pseudospin system

Anna Fontcuberta i Morral, Dirk Grundler

We report highly sensitive de Haas-van Alphen (dHvA) effect measurements on a high-mobility two-dimensional electron system in an AlAs quantum well. Here two valleys are occupied forming a pseudospin system. At 400 mK, the dHvA effect shows pronounced osci ...

2009

Electrochemical modification of graphene

Klaus Kern, Marko Burghard, Kannan Balasubramanian, Ravi Shankar Sundaram

Nanoparticles on an atomic carpet: Individual graphene sheets have been decorated with metal nanoparticles through electrochemistry. The attachment of Pd particles onto graphene renders it sensitive to hydrogen. The controlled functionalization of graphene ...

2008

Phase Separation and Flux Quantization in the Doped Quantum Dimer Model on Square and Triangular Lattices

Frédéric Mila

The doped two-dimensional quantum dimer model is investigated by numerical techniques on the square and triangular lattices, with significantly different results. On the square lattice, at small enough doping, there is always a phase separation between an ...

2007

Simultaneous measurement of the de Haas-van Alphen and the Shubnikov-de Haas effect in a two-dimensional electron system

Dirk Grundler

In a simultaneous experiment we studied the de Haas–van Alphen (dHvA) and the Shubnikov–de Haas (SdH) effects in a two-dimensional electron system (2DES) in a modulation-doped GaAs∕AlxGa1−xAs heterostructure. For this, a gated 2DES mesa was monolithically ...

2006

Spin and interaction effects in Shubnikov-de Haas oscillations and the quantum Hall effect in GaN/AlGaN heterostructures

Nicolas Grandjean

We present the results of high magnetic field (up to 30 T) and temperature (50 mK-80 K) dependent transport measurements on a 2DEG in GaN/AlGaN heterojunctions. A high mobility (above 60000 cm(2) V-1 s(-1) at 4 K) 2DEG was obtained by MBE growth of disloca ...

2004

Observation of magnetophotoluminescence from a GaN/AlxGa1-xN heterojunction

Nicolas Grandjean

Magnetophotoluminescence has been studied from a single undoped GaN/AlxGa1-xN heterojunction with a linewidth of 2.5 meV. The peak originates from the recombination of a photoexcited hole with an electron in the two-dimensional electron gas (2DEG) formed a ...

2002

Graph Chatbot

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.