Three-dimensional electron-hole superfluidity in a superlattice close to room temperature

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...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2019-11
Main Authors: Van der Donck, M, Conti, S, Perali, A, Hamilton, A R, Partoens, B, Peeters, F M, Neilson, D
Format: Article
Language:English
Subjects:
Electrons
Fluids
Holes (electron deficiencies)
Monolayers
Room temperature
Superfluidity
Superlattices
Transition metal compounds
Transition temperature
Variation
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1911.01123