Orbital magnetization in the hopping regime

O. Entin-Wohlman, Y. Imry, A. G. Aronov, Y. Levinson

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The orbital magnetic moment of localized electrons is considered, both in the absence and in the presence of the electron-phonon interaction. This magnetic moment, proportional to the persistent current circulating around groups of at least three localized states, arises from interference of the localized electronic wave functions. It is shown that for the isolated electronic system the magnetic moment has a definite sign which alternates as the location of the Fermi level is varied. When the electrons are coupled to the thermal bath, the orbital magnetic moment decreases due to two effects: (i) the appearance of a current that flows in the opposite direction to that of the isolated system-this countercurrent results from resonant electron-phonon processes, suggested by Holstein; (ii) an overall Debye-Waller factor that diminishes the magnitude of the orbital response to the external magnetic field. A possible experimental realization to observe the countercurrent is discussed.

Original languageEnglish
Pages (from-to)11584-11596
Number of pages13
JournalPhysical Review B
Volume51
Issue number17
DOIs
StatePublished - 1 Jan 1995
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Orbital magnetization in the hopping regime'. Together they form a unique fingerprint.

Cite this