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.
Rok vydání:	2019
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Mesoscale and Nanoscale Physics
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
Externí odkaz:	http://arxiv.org/abs/1911.01123 Zobrazit plný text záznamu View this record from Arxiv