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Nonlinear characteristics in the magnetoconductance of electron billiards
Matthew S. Fairbanks,Colleen A. Marlow,Richard P. Taylor,Heiner Linke 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
The effect of an applied bias on transport through an electron billiard is studied by analysis of magnetoconductance uctuations. It isshown that at low bias, nonlinear eects are well-described by electron heating alone, while at higher bias (V > 2 mV, or approximately 5% of the electron Fermi energy) non-equilibrium eects become signicant. We chart this behavior by examining the eective electrontemperature plotted against the empirical parameter Q (average energy level spacing over energy level broadening) and the spectral scal-ing exponent a. The high bias data shows a departure from a curve composed of lattice temperature data for the same device, which indicates a change in electron dynamics within the billiard.