Contact: Prof. Thierry Giamarchi .

Team fall 2003

Coupling Luttinger liquids gives back a Fermi surface and quasiparticles [1]

Electronic Properties of Low Dimensional Materials
The group works on the theory of condensed matter, in connection with various experimental groups. The research activities include the study of strongly correlated electronic systems, ab initio calculations, and disordered elastic systems (e.g. in vortex lattices or for domain walls in magnetic systems or ferroelectrics).

Under MaNEP, the main activity is to understand the properties of low (i.e. one- or two-) dimensional interacting systems (such as organic conductors, carbon nanotubes, quantum wires). Indeed in low dimensional systems interactions lead to an unconventional state (Luttinger liquid in one dimension), quite different from the canonical Fermi liquid of normal metals. One of the questions is to understand how to go from such a state to a more conventional Fermi liquid by coupling low dimensional systems. Another important issue is to understand the unusual transport properties of such systems. This is of special importance for the mesoscopic realizations of such interacting electronic systems (nanotubes, quantum wire or Wigner crystal) for which such transport measurements are the main probe of the physical properties.

References:
S. Biermann et al. Phys. Rev. Lett. 87 276405 (2001).
T. Nattermann et al. Phys. Rev. Lett. 91 056603 (2003).