Interlayer excitons with tunable dispersion relation

Skinner, Brian

doi:10.1103/PhysRevB.93.235110

Title: Interlayer excitons with tunable dispersion relation

Journal Article · Tue Jun 07 00:00:00 EDT 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.93.235110· OSTI ID:1388202

Skinner, Brian ^[1]

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.

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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

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Cited by: 8 works

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