Category: List of Bases 2011 Throughout the year RESEARCH IN CONDENSED MATTER PHYSICS 

Title:

Seminar on Disorder and strong electron correlations: "Local spectroscopies and percolating transport in quantum Hall systems: Theory and experiment"

Start Time:

11:30

Location:

ICTP (Leonardo da Vinci Building Luigi Stasi Seminar Room)

Contact:

M. Poropat

Speaker(s):

Serge FLORENS (CNRS, Grenoble)

Description:

Recent advances in high resolution scanning tunneling spectroscopy of disordered two-dimensional electron systems under high magnetic field will be the starting point for theoretical developments aiming at a quantum description of guiding center motion of the usual cyclotron orbits. The emphasis will be put on real-space imaging of Landau states and the description of some new observables, such as two-point correlations of density of states in the quantum Hall regime.
In a second part of the talk, macroscopic transport will be studied theoretically in a high temperature range where the classical percolation of drift states dominates. Crossover functions are obtained, which allow the extraction of critical exponent from recent conductivity measurements.