Interlayer excitons with tunable dispersion relation | |
Article | |
关键词: SPIN-ORBIT INTERACTION; QUANTUM-WELLS; SUPERFLUIDITY; CONDENSATION; | |
DOI : 10.1103/PhysRevB.93.235110 | |
来源: SCIE |
【 摘 要 】
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. This diversity suggests a platform for continuously tuning between different quantum phases using an external field.
【 授权许可】
Free