Biexciton-like quartet condensates in an electron-hole liquid
We theoretically study the ground-state properties and the condensations of exciton-like Cooper pairs and biexciton-like Cooper quartets in an electron-hole system. Applying the quartet Bardeen-Cooper-Schrieffer (BCS) theory to the four-component fermionic system consisting of spin-1/2 electrons and...
| Published in: | Physical Review Research |
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| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2022-05-01
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| Online Access: | http://doi.org/10.1103/PhysRevResearch.4.023152 |
| Summary: | We theoretically study the ground-state properties and the condensations of exciton-like Cooper pairs and biexciton-like Cooper quartets in an electron-hole system. Applying the quartet Bardeen-Cooper-Schrieffer (BCS) theory to the four-component fermionic system consisting of spin-1/2 electrons and spin-1/2 holes, we show how Cooper pairs and quartet correlations appear in the equation of state at the thermodynamic limit. The biexciton-like four-body correlations survive even at the high-density regime as a many-body BCS-like state of Cooper quartets. Our results are useful for further understanding of exotic matter in the interdisciplinary context of quantum many-body physics with multiple degrees of freedom. |
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| ISSN: | 2643-1564 |