Magnetoresistance of two-dimensional tight-binding electrons in a weak magnetic field

Unal B., Usta K., KABAK M.

PHYSICA B-CONDENSED MATTER, cilt.404, sa.16, ss.2364-2368, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 404 Sayı: 16
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.physb.2009.04.042
  • Dergi Adı: PHYSICA B-CONDENSED MATTER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2364-2368
  • Anahtar Kelimeler: Magnetoresistance, Disorder, Magnetic field, ANDERSON LOCALIZATION, CONDUCTIVITY, METALS
  • Ankara Üniversitesi Adresli: Evet

Özet

We study the Anderson model on a two-dimensional square lattice with an applied weak magnetic field B which causes the hopping matrix elements to have Peierls phase factors. The recursion method is applied and B dependent conductivity sigma(B) is calculated from the Kubo formula for different system sizes N and degree of disorder W. For large W there is no appreciable change of U(B) with B, but its system size dependence is first an increasing and then a decreasing behavior. (C) 2009 Elsevier B.V. All rights reserved.