Interlayer excitons with tunable dispersion relation
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Interlayer excitons, comprising an electron in one material bound by Coulomb attraction to a hole in an adjacent material, are composite bosons that can assume a variety of many-body phases. The phase diagram of the bosonic system is largely determined by the dispersion relation of the bosons, which itself arises as a combination of the dispersion relations of the electron and hole separately. Here I show that in situations where either the electron or the hole has a nonmonotonic, “Mexican hat-shaped” dispersion relation, the exciton dispersion relation can have a range of qualitatively different forms, each corresponding to a different many-body phase at low temperature. Finally, this diversity suggests a platform for continuously tuning between different quantum phases using an external field.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Excitonics (CE); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0001088
- OSTI ID:
- 1388202
- Alternate ID(s):
- OSTI ID: 1256113
- Journal Information:
- Physical Review B, Vol. 93, Issue 23; Related Information: CE partners with Massachusetts Institute of Technology (lead); Brookhaven National Laboratory; Harvard University; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Calculating excitons, plasmons, and quasiparticles in 2D materials and van der Waals heterostructures
|
journal | June 2017 |
Excitons without effective mass: Biased bilayer graphene
|
journal | January 2019 |
Excitons without effective mass: biased bilayer graphene | text | January 2018 |
Similar Records
Chemical potential and compressibility of quantum Hall bilayer excitons
Long-living excited states of a 2D diamagnetic exciton