Optical spectra and excitonic BEC–BCS crossover in coherent electron–hole pair condensation

Optical spectra and excitonic BEC–BCS crossover in coherent electron–hole pair condensation
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相干电子空穴对凝聚中的光谱和激子 BEC-BCS 交叉

DOI:
10.1016/j.jlumin.2007.12.019
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发表时间:
2008
影响因子:
3.6
通讯作者:
T. Ogawa
T. Ogawa
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Y. Tomio;T. Ogawa

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本文从光学性质的角度出发,利用具有排斥和吸引的两波段Hubbard模型研究了三维电子-空穴(e-h)系统中的相干对凝聚现象。应用自洽t矩阵和局部近似,描述了有限温度下e-h类bcs态和激子玻色-爱因斯坦凝聚(BEC)之间的交叉行为是e-h吸引强度的函数。讨论了激子BEC-BCS交叉过程中吸收光谱和发光光谱的变化。
We investigate coherent pair condensation in three-dimensional electron–hole (e–h) systems using the two-band Hubbard model with both repulsion and attraction, especially from the viewpoint of optical properties. Applying the self-consistent t-matrix and local approximations, the crossover behavior between the e–h BCS-like state and the excitonic Bose–Einstein condensation (BEC) at finite temperatures is described as a function of the e–h attraction strength. The changes of absorption and luminescence spectra are also discussed along the excitonic BEC–BCS crossover.
有限温度下的激子 BCS-BEC 交叉:斥力和电子空穴质量差的影响
DOI: --
发表时间: 2006
期刊: Physical Review B73・23
影响因子: --
作者:
Kimura;Gaku;Y.Tomio
通讯作者: Y.Tomio
高激发激子-极化子凝聚态:交叉到 BCS 相?
DOI: --
发表时间: 2010
期刊:
影响因子: --
作者:
柴田 剛志;田浦 健次朗;河岡義裕;T.Horikiri
通讯作者: T.Horikiri