Inhaltszusammenfassung

We report on a finite-size Hartree-Fock study of the competition between disorder and interactions in a two-dimensional electron gas near landau-level filling factor nu =1. the ground state at nu =1 evolves with increasing disorder from a fully spin-polarized ferromagnet with a charge gap to a partially spin-polarized ferromagnetic anderson insulator, to a quasimetallic paramagnet at the critical point between i=0 and i=2 quantum hall plateaus. away from nu =1, the ground state evolves from a...We report on a finite-size Hartree-Fock study of the competition between disorder and interactions in a two-dimensional electron gas near landau-level filling factor nu =1. the ground state at nu =1 evolves with increasing disorder from a fully spin-polarized ferromagnet with a charge gap to a partially spin-polarized ferromagnetic anderson insulator, to a quasimetallic paramagnet at the critical point between i=0 and i=2 quantum hall plateaus. away from nu =1, the ground state evolves from a ferromagnetic skyrmion quasiparticle glass to a conventional quasiparticle glass, and finally to a conventional anderson insulator. we comment on signatures of these different regimes in low-temperature transport and nmr line shape and peak position data.» weiterlesen» einklappen

Autoren

Klassifikation

DFG Fachgebiet:
3.17 - Theoretische Chemie

DDC Sachgruppe:
Physik