EXCHANGE EFFECTS IN AN ARTIFICIAL ATOM AT HIGH MAGNETIC-FIELDS

被引：94

作者：

KLEIN, O ^{[1
]}

CHAMON, CD ^{[1
]}

TANG, D ^{[1
]}

ABUSCHMAGDER, DM ^{[1
]}

MEIRAV, U ^{[1
]}

WEN, XG ^{[1
]}

KASTNER, MA ^{[1
]}

WIND, SJ ^{[1
]}

机构：

[1] IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.74.785

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A droplet of N∼30 electrons is created by lateral confinement of a two-dimensional electron gas. The evolution of its chemical potential μN with magnetic field B is inferred from resonant tunneling experiments and is used to study the dependence of its magnetization on B.The experimental data, quantitatively described by Hartree-Fock theory, suggest a divergent spin susceptibility at Bc implying a ground state of minimum total spin just below Bc. In the spin polarized regime we observe a new phase also predicted by Hartree-Fock theory. © 1995 The American Physical Society.

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页码：785 / 788

页数：4

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