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arXiv 1602.08403cond-mat.mes-hall
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超高质量GaAs量子阱中的微波光阻

Microwave Photoresistance in an Ultrahigh Quality GaAs Quantum Well

Q. Shi, S. A. Studenikin, M. A. Zudov, K. W. Baldwin, L. N. Pfeiffer, K. W. West

摘要:

微波诱导电阻振荡(MIRO)的温度依赖性,根据该理论,起源于电子-电子散射。这种散射影响量子寿命或态密度,以及非弹性寿命,这决定了非平衡分布函数的弛豫。在这里,我们报告了在$0.3$ K和$1.8$ K之间的$T$处的迁移率($μ> 3 \times 10^7$ cm $^2$ /Vs)2D电子气中的MIRO。与理论预测相反,量子寿命被发现是$T$ -独立的在整个温度范围内研究。同时,非弹性寿命的$T$依赖性比电子-电子相互作用所能预期的要大\emph{stronger}。

英文摘要:

The temperature dependence of microwave-induced resistance oscillations (MIRO), according to the theory, originates from electron-electron scattering. This scattering affects both the quantum lifetime, or the density of states, and the inelastic lifetime, which governs the relaxation of the nonequilibrium distribution function. Here, we report on MIRO in an ultrahigh mobility ($μ> 3 \times 10^7$ cm$^2$/Vs) 2D electron gas at $T$ between $0.3$ K and $1.8$ K. In contrast to theoretical predictions, the quantum lifetime is found to be $T$-independent in the whole temperature range studied. At the same time, the $T$-dependence of the inelastic lifetime is much \emph{stronger} than can be expected from electron-electron interactions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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