DENSITY-FUNCTIONAL THEORY OF QUANTUM WIRES AND DOTS IN A STRONG MAGNETIC-FIELD

被引：28

作者：

STOOF, TH ^{[1
]}

BAUER, GEW ^{[1
]}

机构：

[1] DELFT UNIV TECHNOL, DELFT INST MICROELECTR & SUBMICRON TECHNOL, 2628 CJ DELFT, NETHERLANDS

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.52.12143

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the competition between the exchange and the direct Coulomb interaction near the edge of a two-dimensional electron gas in a strong magnetic field using density-functional theory in a local approximation for the exchange-energy functional. Exchange is shown to play a significant role in reducing the spatial extent of the compressible edge channel regions obtained from an electrostatic description. The transition from the incompressible edge channels of the Hartree-Fock picture to the broad, compressible strips predicted by electrostatics occurs within a narrow and experimentally accessible range of confinement strengths.

引用

页码：12143 / 12152

页数：10

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