Shubnikov-de Haas oscillations, peaks and different temperature regimes of the diagonal conductivity in the integer quantum Hall conductor


  • V.M. Gvozdikov Kharkov National University, 61077, Kharkov, Ukraine


Ключові слова:

PACS: 73.43.–f, 73.40.Gk, 75.47.–m


A theory for the Shubnikov—de Haas oscillations in the diagonal conductivity sxx of a 2D conductor is developed for the case when electron states within the broaden Landau levels are localized except the narrow stripe in the center. The standard Shubnikov—de Haas oscillations take place only in the low-field region which at higher magnetic fields crosses over into peaks. In the limit Wt >> 1 peaks in the sxx became sharp and between them sxx → 0 (W is the cyclotron frequency, t is the electron scattering time). The conductivity peaks display different temperature behavior with the decrease of temperature, T: a thermal activation regime, sxx µexp(-D/T), which holds at higher temperatures, crosses over into the variable-range-hopping regime at lower temperatures with sxxµ1/Texp(-√ T0/T)(the prefactor 1/T is absent in the conductance).


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Як цитувати

Gvozdikov, V. Shubnikov-De Haas Oscillations, Peaks and Different Temperature Regimes of the Diagonal Conductivity in the Integer Quantum Hall Conductor. Fiz. Nizk. Temp. 2005, 31, 826-831.



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