Three-dimensional electron-hole superfluidity in a superlattice close to room temperature
Autor: | Van der Donck, M., Conti, S., Perali, A., Hamilton, A. R., Partoens, B., Peeters, F. M., Neilson, D. |
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Rok vydání: | 2019 |
Předmět: | |
Zdroj: | Phys. Rev. B 102, 060503 (2020) |
Druh dokumentu: | Working Paper |
DOI: | 10.1103/PhysRevB.102.060503 |
Popis: | Although there is strong theoretical and experimental evidence for electron-hole superfluidity in separated sheets of electrons and holes at low $T$, extending superfluidity to high $T$ is limited by strong 2D fluctuations and Kosterlitz-Thouless effects. We show this limitation can be overcome using a superlattice of alternating electron- and hole-doped semiconductor monolayers. The superfluid transition in a 3D superlattice is not topological, and for strong electron-hole pair coupling, the transition temperature $T_c$ can be at room temperature. As a quantitative illustration, we show $T_c$ can reach $270$ K for a superfluid in a realistic superlattice of transition metal dichalcogenide monolayers. Comment: 5 pages, 3 figures, supplementary material (3 pages) includes 1 table and 1 figure |
Databáze: | arXiv |
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