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arXiv 1010.6080cond-mat.mes-hall
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量子阱中的热激活子带间散射和振荡磁电阻

Thermally activated intersubband scattering and oscillating magnetoresistance in quantum wells

S. Wiedmann, G. M. Gusev, O. E. Raichev, A. K. Bakarov, J. C. Portal

摘要:

高迁移率宽量子阱中磁电阻的实验研究揭示了随着温度升高到10 K而出现的振荡,其周期接近于Shubnikov-de Haas振荡。所观察到的现象被确定为magnetointersubband振荡所造成的两个被占领的子带和第三子带之间的电子的散射成为占领作为热激活的结果。这些小周期振荡对热抑制的敏感性低于由第一和第二子带之间的散射引起的大周期磁子带间振荡。理论研究的基础上考虑电子散射的边缘附近的第三个子带,给出了一个合理的解释,我们的实验结果。

英文摘要:

Experimental studies of magnetoresistance in high-mobility wide quantum wells reveal oscillations which appear with an increase in temperature to 10 K and whose period is close to that of Shubnikov-de Haas oscillations. The observed phenomenon is identified as magnetointersubband oscillations caused by the scattering of electrons between two occupied subbands and the third subband which becomes occupied as a result of thermal activation. These small-period oscillations are less sensitive to thermal suppression than the largeperiod magnetointersubband oscillations caused by the scattering between the first and the second subbands. Theoretical study, based on consideration of electron scattering near the edge of the third subband, gives a reasonable explanation of our experimental findings.

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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