Many-body states in a quantum dot under high magnetic fields

被引：11

作者：

Eto, M ^{[1
]}

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Phys, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1999年 / 38卷 / 1B期

关键词：

quantum dot; Coulomb blockade; Coulomb oscillation; electronic correlation; exact diagonalization; maximum density droplet;

D O I：

10.1143/JJAP.38.376

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Many-body electronic states in a quantum dot an studied under high magnetic fields, using the exact diagonalization method. The magnetic field dependence of low-lying excited states as well as the ground state is calculated, which is in good agreement with experimental results of Coulomb oscillation. The maximum density droplet (MDD), in which all the electrons are completely spin-polarized and accommodated in the lowest levels, appears in a range of the magnetic field. The range is narrower for larger number of electrons in the dot. Under higher magnetic fields, the MDD state is replaced by a new ground state in which electrons are strongly correlated to each other. The correlation effect considerably reduces the peak heights of the conductance.

引用

页码：376 / 379

页数：4

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