NOVEL SUPERLATTICE IN A SELECTIVELY DOPED WIDE PARABOLIC QUANTUM-WELL WITH A MODULATED POTENTIAL

被引：24

作者：

JO, J ^{[1
]}

SANTOS, M ^{[1
]}

SHAYEGAN, M ^{[1
]}

SUEN, YW ^{[1
]}

ENGEL, LW ^{[1
]}

LANZILLOTTO, AM ^{[1
]}

机构：

[1] DAVID SARNOFF RES CTR,PRINCETON,NJ 08543

来源：

APPLIED PHYSICS LETTERS | 1990年 / 57卷 / 20期

关键词：

D O I：

10.1063/1.103920

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the realization of a novel superlattice which contains a high mobility (≅ 1.1×105 cm2/V s at 4 K) degenerate electron system. The structure consists of a wide, undoped AlxGa 1-xAs well bounded by undoped (spacer) and doped layers of Al yGa1-yAs (y≳x) on both sides. The alloy composition in the well (x) is graded in such a way as to result in a parabolic potential with an additional sinusoidal modulation superimposed on it. Once transferred into this well, the electrons screen the parabolic potential and an electron system with a modulated charge density is obtained. We present self-consistent quantum mechanical calculations of the electronic system, and report our characterization of the structure by secondary-ion mass spectrometry and magnetotransport measurements.

引用

页码：2130 / 2132

页数：3

共 15 条

[1] MAGNETIC-FIELD-DRIVEN DESTRUCTION OF QUANTUM HALL STATES IN A DOUBLE QUANTUM-WELL [J].