Theoretische Physik IV
  • Mesoscopic effects and quantum coherence in solid state nanostructures
  • Transport properties of carbon nanotubes and graphene
  • Topological InsulatorsSpintronics: spin qubits and spin transport
  • Physics of quantum information processing
  • Physics of 1D systems: Luttinger liquids
  • Nano electromechanical systems

Chair of Theoretical Physics 4

Mesoscopic Physics

TP4 Office

Nelly Meyer

Office: M1, 02.024
Tel.: +49 931 31-85131
Fax.: +49 931 31-85939


Recent Publications

Tunneling Planar Hall Effect in Topological Insulators


We investigate tunneling across a single ferromagnetic barrier on the surface of a three-dimensional topological insulator. In the presence of a magnetization component along the bias direction, a tunneling planar Hall conductance (TPHC), transverse to the applied bias, develops. Electrostatic control of the barrier enables a giant Hall angle, with the TPHC exceeding the longitudinal tunneling conductance. [...]


Lévy Flights due to Anisotropic Disorder in Graphene


We study transport properties of graphene with anisotropically distributed on-site impurities (adatoms) that are randomly placed on every third line drawn along carbon bonds. We show that stripe states characterized by strongly suppressed backscattering are formed in this model in the direction of the lines. The system reveals Lévy-flight transport in the stripe direction such that the corresponding conductivity increases as [...]


Signatures of Topological Quantum Phase Transitions


Topological quantum phase transitions are characterized by changes in global topological invariants. These invariants classify many-body systems beyond the conventional paradigm of local order parameters describing spontaneous symmetry breaking. For noninteracting electrons, it is well understood that such transitions are continuous and always accompanied by a gap closing in he energy spectrum, given that [...]



Lehrstuhl für Theoretische Physik IV
Am Hubland
97074 Würzburg

Phone: +49 931 31-85131
Fax: +49 931 31-85141

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Hubland Süd, Geb. M1