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arXiv 1303.3208cond-mat.str-elcond-mat.mes-hall
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外电场作用下周期势中的电子配对

Electron pairing in periodic potentials under an external electric field

Christopher Gaul, Antonio Rodríguez, Rodrigo P. A. Lima, Francisco Domínguez-Adame

摘要:

本文研究了偏置晶格中相互作用电子的半经典动力学。一个复杂的动力学场景出现从库仑和外部电场之间的相互作用。当电子相距较远时,库仑势与外部势相比可能较小,并且电子以由局部电场确定的有效布洛赫频率振荡。在相反的情况下,附近的电子要么分开,要么形成一个束缚对,这取决于与带宽相比的初始能量。由于库仑场的对是稳定的,即使在没有外场。

英文摘要:

We study the semiclassical dynamics of interacting electrons in a biased crystal lattice. A complex dynamical scenario emerges from the interplay between the Coulomb and the external electric fields. When the electrons are far apart, the Coulomb potential may be small compared to the external potential and the electrons oscillate with effective Bloch frequencies, determined by the local electric field. In the opposite case, nearby electrons either separate or form a bound pair, depending on the initial energy compared to the band width. The pair due to the Coulomb field is stable even in the absence of the external field.

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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