Formation mechanism and low-temperature instability of exciton rings

被引：123

作者：

Butov, LV ^{[1
]}

Levitov, LS

Mintsev, AV

Simons, BD

Gossard, AC

Chemla, DS

机构：

[1] EO Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[3] MIT, Dept Phys, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

[4] Univ Cambridge, Cavendish Lab, Cambridge CB3 OHE, England

[5] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA

[6] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 11期

基金：

俄罗斯基础研究基金会; 美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.92.117404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The macroscopic rings observed in the photoluminescence patterns of excitons in coupled quantum wells are explained by a mechanism of carrier imbalance, transport, and recombination. The rings originate from the spatial separation of p and n carriers, and occur at the interface of the p and n domains, where excitons are generated. We explore the states of excitons in the ring over a range of temperatures down to 380 mK and report a transition of the ring into a periodic array of aggregates, a new low-temperature ordered exciton state.

引用

页码：117404 / 1

页数：4

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