Condensation of excitons in Cu2O at ultracold temperatures: experiment and theory

被引：38

作者：

Stolz, Heinrich ^{[1
]}

Schwartz, Rico ^{[1
]}

Kieseling, Frank ^{[1
]}

Som, Sunipa ^{[1
]}

Kaupsch, Maria ^{[1
]}

Sobkowiak, Siegfried ^{[1
]}

Semkat, Dirk ^{[1
]}

Naka, Nobuko ^{[2
,3
]}

Koch, Thomas ^{[4
]}

Fehske, Holger ^{[4
]}

机构：

[1] Univ Rostock, Inst Phys, D-18051 Rostock, Germany

[2] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[3] JST, PRESTO, Saitama 3320012, Japan

[4] Ernst Moritz Arndt Univ Greifswald, Inst Phys, D-17487 Greifswald, Germany

来源：

NEW JOURNAL OF PHYSICS | 2012年 / 14卷

关键词：

BOSE-EINSTEIN CONDENSATION; RELAXATION KINETICS; CUPROUS-OXIDE; PARAEXCITONS; LUMINESCENCE; MIXTURES; GAS;

D O I：

10.1088/1367-2630/14/10/105007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present experiments on the luminescence of excitons confined in a potential trap at milli-Kelvin bath temperatures under continuous-wave (cw) excitation. They reveal several distinct features like a kink in the dependence of the total integrated luminescence intensity on excitation laser power and a bimodal distribution of the spatially resolved luminescence. Furthermore, we discuss the present state of the theoretical description of Bose-Einstein condensation of excitons with respect to signatures of a condensate in the luminescence. The comparison of the experimental data with theoretical results with respect to the spatially resolved as well as the integrated luminescence intensity shows the necessity of taking into account a Bose-Einstein condensed excitonic phase in order to understand the behaviour of the trapped excitons.

引用

页数：37

共 69 条

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