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Title
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Effect of mismatched electron-hole effective masses on superfluidity in double layer solid-state systems
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Author
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Abstract
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| Superfluidity has been predicted and now observed in a number of different electron-hole double-layer semiconductor heterostructures. In some of the heterostructures, such as GaAs and Ge-Si electron-hole double quantum wells, there is a strong mismatch between the electron and hole effective masses. We systematically investigate the sensitivity to unequal masses of the superfluid properties and the self-consistent screening of the electron-hole pairing interaction. We find that the superfluid properties are insensitive to mass imbalance in the low density BEC regime of strongly-coupled boson-like electron-hole pairs. At higher densities, in the BEC-BCS crossover regime of fermionic pairs, we find that mass imbalance between electrons and holes weakens the superfluidity and expands the density range for the BEC-BCS crossover regime. This permits screening to kill the superfluid at a lower density than for equal masses. |
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Language
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English
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Source (journal)
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Condensed Matter. - [S.l.]
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Publication
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[S.l.]
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MDPI AG
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2021
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ISSN
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2410-3896
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DOI
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10.3390/CONDMAT6020014
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Volume/pages
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6
:2
(2021)
, 13 p.
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Article Reference
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14
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ISI
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000665155800001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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