Biexciton-like quartet condensates in an electron-hole liquid

@article{Guo2022BiexcitonlikeQC,
  title={Biexciton-like quartet condensates in an electron-hole liquid},
  author={Yixin Guo and Hiroyuki Tajima and Haozhao Liang},
  journal={Physical Review Research},
  year={2022}
}
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- 12 electrons and spin- 12 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… 
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