DOI

The partition function of the periodic Anderson model for an infinite U-term is represented by the path integral over the Grassmann variables for band s-electrons and supercoherent SU(2\1) variables for localized d-electrons. The effective electron action is obtained for d-electrons with a level E < 0 through the averaging of the thermal distribution over the s-electron trajectories. Due to the spinon-charge separation in the path integral over the d-variables, the low-temperature and spin mean-field approximations are introduced and are shown to lead to the adiabatic approximation suggested earlier. Non-linear dependence of the chemical potential μ on the electron concentration n < 1 is established for the narrow s-electron band w ≪ |E\ and the Kondo-like temperature behavior is found for n > 1 in wide w ≪ |E\ s-electron band.

Язык оригиналаанглийский
Страницы (с-по)298-306
Число страниц9
ЖурналPhysica C: Superconductivity and its Applications
Том296
Номер выпуска3-4
DOI
СостояниеОпубликовано - 20 фев 1998

    Предметные области Scopus

  • Электроника, оптика и магнитные материалы
  • Физика конденсатов
  • Энергетическая технология
  • Электротехника и электроника

ID: 51232116