2003/01/01 by Tigran Sedrakyan, T. A. Sedrakyan, M. E. Raikh +2
Arts and Humanities · Materials Science · Physics and Astronomy · Social Sciences · #Economic and Social Development #Electronic and Structural Properties of Oxides #Libraries, Manuscripts, and Books #Philosophical Thought and Analysis #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.100.086808
published as Phys. Rev. Lett. 100, 086808 (2008) · 4+ pages, 3 figures
openalex publication_date 2003/01/01 · arxiv created 2008/03/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/04/28
Electron-electron interactions give rise to the correction, deltasigma(int)(omega), to the ac magnetoconductivity, sigma(omega), of a clean 2D electron gas that is periodic in omega_(c)(-1), where omega_(c) is the cyclotron frequency. Unlike conventional harmonics of the cyclotron resonance, which are periodic with omega, this correction is periodic with omega(3/2). Oscillations in deltasigma(int)(omega) develop at low magnetic fields, omega_(c)<<omega, when the conventional harmonics are suppressed by the disorder. Their origin is a double backscattering of an electron from the impurity-induced Friedel oscillations. During the time approximately omega(-1) between the two backscattering events the electron travels only a small portion of the Larmour circle.