Observation of preformed electron-hole Cooper pairs in highly excited ZnO

Marijn A. M. Versteegh; A. J. van Lange; H. T. C. Stoof; Jaap I. Dijkhuis

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Observation of preformed electron-hole Cooper pairs in highly excited ZnO

机译：高激发ZnO中预先形成的电子-空穴Cooper对的观察

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Electrons and holes in a semiconductor form hydrogen-atom-like bound states, called excitons. At high electron-hole densities the attractive Coulomb force becomes screened and excitons can no longer exist. BCS theory predicts that at such high densities cooperative many-body effects can at low temperatures induce a bound state, an electron-hole Cooper pair, comparable to an electron-electron Cooper pair in a superconductor. Here we report the observation of preformed electron-hole Cooper pairs in a semiconductor. By measuring stimulated emission from a dense electron-hole gas in ZnO, we have explored both the crossover from the electron-hole plasma to the preformed Cooper-pair regime, and the crossover from the exciton to the preformed Cooper-pair regime.

机译：半导体中的电子和空穴形成类似于氢原子的结合态，称为激子。在高电子空穴密度下，有吸引力的库仑力被屏蔽，激子不再存在。 BCS理论预测，在如此高的密度下，协作多体效应可以在低温下诱导一个束缚态，一个电子-空穴库珀对，与超导体中的电子-电子库珀对相当。在这里，我们报告对半导体中预先形成的电子-空穴库珀对的观察。通过测量ZnO中致密的电子空穴气体的受激发射，我们既研究了从电子空穴等离子体到预先形成的Cooper对机制的交叉，又研究了从激子到预先形成的Cooper对机制的交叉。

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来源
《Physical review》 |2012年第19期|p.195206.1-195206.8|共8页
作者
Marijn A. M. Versteegh; A. J. van Lange; H. T. C. Stoof; Jaap I. Dijkhuis;
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作者单位

Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands;

Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands;

Institute for Theoretical Physics, Utrecht University, Leuvenlaan 4, 3584 CE Utrecht, The Netherlands;

Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands;

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正文语种 eng
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collective effects (bose effects, phase space filling, and excitonic phase transitions); excited states and pairing interactions in model systems; stimulated emission; Ⅱ-Ⅵ semiconductors;

机译：集体效应（玻色效应;相空间填充和激子相变）;模型系统中的激发态和配对相互作用;受激发射;Ⅱ-Ⅵ半导体;

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机译：静态和微波磁场中电子-空穴对的自旋重新取向引起的激发ZnO量子点中隧道余辉强度的巨大变化
2. Spatial separation of photogenerated electron-hole pairs in solution-grown ZnO tandem n-p core-shell nanowire arrays toward highly sensitive photoelectrochemical detection of hydrogen peroxide [J] . Cai Yun, Kozhummal Rajeevan, Kuebel Christian, Journal of Materials Chemistry, A. Materials for energy and sustainability . 2017,第27期

机译：溶液生长的ZnO串联N-P核 - 壳纳米线阵列朝向高敏光电化学检测的光生电子空穴对的空间分离
3. Shot noise of photon-excited electron-hole pairs in open quantum dots [J] . M. L. Polianski, P. Samuelsson, M. Buettiker Physical review. B, Condensed Matter And Materials Physics . 2005,第16期

机译：开量子点中光子激发的电子-空穴对的散粒噪声
4. Berry phases in quantum trajectories of optically excited electron-hole pairs in semiconductors under intense terahertz fields [C] . Yang Fan, Liu Ren-Bao Conference on Lasers and Electro-Optics . 2013

机译：太赫兹场下半导体中光激发电子-空穴对的量子轨迹中的贝里相
5. Transverse sound spectroscopy of excited Cooper pair states in superfluid helium-3. [D] . Davis, John Patrick. 2008

机译：超流氦3中激发库珀对态的横向声谱。
6. Evidence for a preformed Cooper pair model in the pseudogap spectra of a Ca10(Pt4As8)(Fe2As2)5 single crystal with a nodal superconducting gap [O] . Y. I. Seo, W. J. Choi, Shin-ichi Kimura, -1

机译：带有结超导间隙的Ca10（Pt4As8）（Fe2As2）5单晶的伪能隙谱中预制Cooper对模型的证据
7. Observation of preformed electron-hole Cooper pairs in highly excited ZnO [O] . Versteegh, M.A.M., van Lange, A.J., Stoof, H.T.C., 2012

机译：高激发ZnO中预制电子 - 空穴Cooper对的观察
8. Formation of Electron-Hole Pairs in a Semiconductor by Vibrationally-Excited Molecules [R] . Last, I., George, T. F. 1984

机译：用振动激发分子在半导体中形成电子 - 空穴对

Observation of preformed electron-hole Cooper pairs in highly excited ZnO

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