EVIDENCE FOR AN ELECTRIC-FIELD-INDUCED PHASE-TRANSITION IN A SPIN-POLARIZED 2-DIMENSIONAL ELECTRON-GAS

被引：82

作者：

KANE, BE

PFEIFFER, LN

WEST, KW

机构：

[1] AT and T Bell Laboratories, Murray Hill

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.46.7264

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A junction between two coplanar two-dimensional electron gases in a AlxGa1-xAs/GaAs heterostructure at which the Fermi level crosses between adjacent spin-split Landau levels has remarkable current-voltage characteristics: current is time dependent, a consequence of dynamic nuclear polarization at the junction. Also, when biased so as to increase the junction electric field, the junction exhibits a series of abrupt transitions between distinct states, an effect that we attributed to an electric-field-induced phase transition of the spin-polarized electrons at the junction.

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页码：7264 / 7267

页数：4

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