Evidence for an electric-field-induced phase transition in a spin-polarized two-dimensional electron gas.
Evidence for an electric-field-induced phase transition in a spin-polarized two-dimensional electron gas.
复制标题
自旋极化二维电子气中电场诱导相变的证据。
DOI：
10.1103/physrevb.46.7264
复制
发表时间：
1992
期刊：
影响因子：
--
通讯作者：
West
中科院分区：
文献类型：
--
作者：
Kane;Pfeiffer.;West
在AlₓGa₁₋ₓAs/GaAs异质结构中，两个共面二维电子气之间的一个结具有显著的电流 - 电压特性，在该结处费米能级在相邻的自旋分裂朗道能级之间交叉：电流是时间相关的，这是结处动态核极化的结果。此外，当施加偏压以增加结电场时，结在不同状态之间呈现出一系列突然的转变，我们将这种效应归因于结处自旋极化电子的电场诱导相变。
A junction between two coplanar two-dimensional electron gases in a Al x Ga 1-x As/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