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】

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