Lehrveranstaltungen

Seminar Quanteneffekte in Festkörpern

Zeit: Mittwoch, 10:15-11:45

Winter Semester 2014/15

Ort: Appelstr. 2, Raum 268

Vorbesprechung: 15.10.2014

Themen:

  • Zweidimensionale Festkörper: Überraschungen in Graphen, MoS2 und WSe2
  • Spinelektronik in Halbleitern: Von Spin-Optoelektronik zum Spin-Quantencomputer
  • Molekulare Elektronik: Die kleinsten Transistoren der Welt
  • Quantenpunkte und Nanodrähte
  • Symmetrien und Korrelationen integrabler Quantensysteme

Beteiligte Personen:

  • Prof. Dr. Rolf Haug
  • Prof. Dr. Herbert Pfnür
  • Prof. Dr. Holger Frahm
  • Prof. Dr. Christioph Tegenkamp
  • Prof. Dr. Eric Jeckelmann
  • Prof. Dr. Michael Oestreich

 

Special Events

Datum Zeit Raum Titel Vortragende(r)
17.02.15 14.15 268 Electronic transport in graphene-topological insulator hybrid devices Hadar Steinberg
23.03.15 14.15 268 Long-range Transport through Quantum Dot Arrays
Gloria Platero
18.06.15 16.15 268 Quantum Hall Effect: Where does the current flow for the quantized Hall resistance? Prof. Jürgen Weis
25.08.15 14.15 022 Thermalization of correlated electrons in quantum wires Dr. Dmitry Polyakov (KIT, Karlsruhe)
15.10.15 16.15 268 Spin-Coherent Dot-Cavity Electronics Dr. Clemens Rössler (ETH Zürich)
30.10.15 14.15 022 Search for Majorana fermions in semiconductor nanostructures Prof. Dr. Tapash Chakraborty (University of Manitoba, Winnipeg, Canada)
14.01.16 16.15 268 Waves in weakly scattering random media: from branched electron flows to the random focusing of tsunami waves Ragnar Fleischmann (Max-Planck Institut für Dynamik und Selbstorganisation, Göttingen)
08.11.16 14.00 LNQE
R001
Carbon nanotube/molecule nanostructures for quantum nanodevices

Prof. Dr. Koji Ishibash, Advanced Device Laboratory
RIKEN, Japan

17.05.2017 10:15 268 Electron spin polarization ans pseudospin ordering in correlated double-layer quantum Hall systems

Dr. Lars Tiemann, Institute of Nanostructures and Solid State Physics and Center for Hybrid Nanostructures, University Hamburg

Abstract for the talk of Lars Tiemann:


Two-dimensional electron systems (2DES) at low temperatures and high magnetic fields can display a variety of fascinating quantum effects. In a double-layer system consisting of two 2DESs, which are separated by a distance of a few nanometers, strong Coulomb interactions can govern the emergence of an even more exotic correlated double-layer state with unusual properties.

In this talk I will discuss the competition between ordinary fractional quantum Hall effects and the emergent double-layer state. By using a resistive type of nuclear magnetic resonance (NMR) experiments I can highlight the role of the Coulomb interaction between the two layers and demonstrate how it is able to spin-polarize the two-dimensional electron systems [1].

 

[1] Phys. Rev. Lett. 114, 176804 (2015).

 

Dr. Kai Schwarzwälder