dorsal/arxiv
View SchemaPrediction of superconductivity in mass-asymmetric electron-hole bilayers
| Authors | Luca Nashabeh, Liang Fu |
|---|---|
| Categories | |
| ArXiv ID | 2601.07729vv2 |
| URL | https://arxiv.org/abs/2601.07729 |
| License | http://creativecommons.org/licenses/by/4.0/ |
Abstract
We study density-balanced, mass-asymmetric electron-hole bilayers as a tunable platform for correlated quantum phases. With independent control of carrier density and interlayer separation, the system exhibits a rich phase diagram, including exciton condensates, Wigner crystals, and for large hole-to-electron mass ratios, an electron-liquid hole-crystal phase. This mixed phase is an analog of two-dimensional metallic hydrogen, featuring an electron liquid immersed in and coupled to a lattice of heavy holes. We show that acoustic plasmons mediate an attractive interaction between electrons, leading to BCS-type superconductivity at experimentally accessible parameters. The superconducting transition temperature is calculated from first principles, and experimental realization in van der Waals heterostructures is discussed.
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"abstract": "We study density-balanced, mass-asymmetric electron-hole bilayers as a tunable platform for correlated quantum phases. With independent control of carrier density and interlayer separation, the system exhibits a rich phase diagram, including exciton condensates, Wigner crystals, and for large hole-to-electron mass ratios, an electron-liquid hole-crystal phase. This mixed phase is an analog of two-dimensional metallic hydrogen, featuring an electron liquid immersed in and coupled to a lattice of heavy holes. We show that acoustic plasmons mediate an attractive interaction between electrons, leading to BCS-type superconductivity at experimentally accessible parameters. The superconducting transition temperature is calculated from first principles, and experimental realization in van der Waals heterostructures is discussed.",
"arxiv_id": "2601.07729",
"authors": [
"Luca Nashabeh",
"Liang Fu"
],
"categories": [
"cond-mat.supr-con",
"cond-mat.mes-hall",
"cond-mat.str-el"
],
"license": "http://creativecommons.org/licenses/by/4.0/",
"title": "Prediction of superconductivity in mass-asymmetric electron-hole bilayers",
"url": "https://arxiv.org/abs/2601.07729",
"version": "v2"
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