Light-induced electron pairing in a bilayer structure
We demonstrate the existence of doubly charged exciton states in strongly screened bilayers of transition metal dichalcogenide layers. These complexes are important because they are preformed electron pairs that can, in principle, undergo Bose-Einstein condensation, in which case they would also form a new type of superconductor, consisting of stable bosons with net charge. Our measurements include 1) continuous control of the doping density with both positive and negative carriers, showing the expected population dependencies on the free carrier density, and 2) measurement of the dependence on magnetic field, showing that this new bound state is a spin triplet. These results imply that it is promising to look for superconductivity in this system.
Authors
- Igor V. Bondarev (ORCID: https://orcid.org/0000-0003-0739-210X)
- Jonathan Beaumariage
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0003-0017-7669)
- Qiaochu Wan (ORCID: https://orcid.org/0000-0003-4877-9722)
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- Zheng Sun (ORCID: https://orcid.org/0000-0002-5209-2563)
- Dmitry Smirnov (ORCID: https://orcid.org/0000-0001-6358-3221)
- David W. Snoke (ORCID: https://orcid.org/0000-0001-8207-6524)
- Li Xiang (ORCID: https://orcid.org/0000-0002-1565-0271)
- Daniel Vaz
- J. T. Ye
- Nathan Youngblood
- Anshul Ramavath
- Brandon Vargo
Institutions
- Florida State University (US)
- North Carolina Central University (US)
- University of Pittsburgh (US)
- National Institute for Materials Science (JP)
- National High Magnetic Field Laboratory (US)
- East China Normal University (CN)
Publication Details
- Journal
- Reports on Progress in Physics
- Published
- 2025-12-11
- DOI
- https://doi.org/10.1088/1361-6633/ae2ba1
- Citations
- 1
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.52