WORK FUNCTION OF A 2-DIMENSIONAL ELECTRON-GAS IN FLAT-BAND HETEROJUNCTIONS - THE ROLE OF IMAGE CHARGES

被引：9

作者：

GROSHEV, A ^{[1
]}

SCHON, G ^{[1
]}

机构：

[1] UNIV SOFIA, DEPT THEORET PHYS, BU-1126 SOFIA, BULGARIA

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.71.2809

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce and calculate the work function PHI2DEG of a 2-dimensional electron gas (2DEG). In contrast to the situation in 3D metals PHI2DEG is determined by the image tail of the potential, which arises due to the screening by the free carriers in the 2DEG. The work function PHI2DEG can be measured by the photoelectric effect in the far-infrared regime using existing experimental structures and techniques. Typical values for GaAs/AlGaAs heterojunctions are in the range PHI2DEG almost-equal-to 1.5 - 2 meV.

引用

页码：2809 / 2812

页数：4

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