Spin dynamics of two-dimensional electrons in a quantum Hall system probed by time-resolved Kerr rotation spectroscopy

被引：29

作者：

Fukuoka, D. ^{[1
]}

Yamazaki, T. ^{[1
]}

Tanaka, N. ^{[1
]}

Oto, K. ^{[1
]}

Muro, K. ^{[1
]}

Hirayama, Y. ^{[2
]}

Kumada, N. ^{[3
]}

Yamaguchi, H. ^{[3
]}

机构：

[1] Chiba Univ, Grad Sch Sci, Chiba 2638522, Japan

[2] Tohoku Univ, Grad Sch Sci, Sendai, Miyagi 9808577, Japan

[3] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.78.041304

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Time-resolved Kerr rotation spectroscopy under the radio frequency field to depolarize dynamic nuclear polarization reveals the intrinsic spin-relaxation time (T(2)(*)) and g factor of two-dimensional electrons in a quantum Hall system. Out-of-plane magnetic field increases the spin coherence drastically through the Landau level quantization. T(2)(*) is enhanced strongly around odd filling factors where a quantum Hall ferromagnet is formed. Collapse of spin coherence and appearance of an anomalous Kerr signal observed around nu=1 are discussed in the relation to the formation of Skyrmions.

引用

页数：4

共 24 条

[1]

[Anonymous], SEMICONDUCTOR SPINTR

[2] Spin relaxation in quantum hall systems [J].