Dynamical exciton condensates in biased electron-hole bilayers

Sun, Zhiyuan (author), Murakami, Yuta (author), Xuan, Fengyuan (author), Kaneko, Tatsuya (author), Golež, Denis (author), Millis, Andrew J. (author)

Bilayer materials may support interlayer excitons comprised of electrons in one layer and holes in the other. In experiments, a nonzero exciton density is typically sustained by a bias chemical potential, implemented either by optical pumping or by electrical contacts connected to the two layers. We show that if charge can tunnel between the layers, the chemical potential bias means that an exciton condensate is in the dynamical regime of ac Josephson effect. It has physical consequences such as tunneling currents and the ability to tune a condensate from bright (emitting coherent photons) to dark by experimental controlling knobs. If the system is placed in an optical cavity, coupling with cavity photons favors different dynamical states depending on the bias, realizing superradiant phases.

• Language: English
• Keywords: condensed matter physics
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FMF - Faculty of Mathematics and Physics
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: Str. 217002-1-217002-9
• Numbering: Vol. 133, iss. 21
• PID: 20.500.12556/RUL-165177
• UDC: 538.9
• ISSN on article: 0031-9007
• DOI: 10.1103/PhysRevLett.133.217002
• COBISS.SI-ID: 216468995
• Publication date in RUL: 26.11.2024

Record is a part of a journal

• Title: Physical review letters
• Shortened title: Phys. rev. lett.
• Publisher: American Physical Society
• ISSN: 0031-9007
• COBISS.SI-ID: 1282575

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: fizika kondenzirane snovi

Projects

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P1-0044-2022
• Name: Teorija trdnih snovi in statistična fizika

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: J1-2455-2020
• Name: Modeliranje neravnovesnih kvantnih materialov na različnih skalah