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Title: Interlayer excitons with tunable dispersion relation

Abstract

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.

Authors:
 [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Excitonics (CE); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1388202
Alternate Identifier(s):
OSTI ID: 1256113
Grant/Contract Number:  
SC0001088
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 23; Related Information: CE partners with Massachusetts Institute of Technology (lead); Brookhaven National Laboratory; Harvard University; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Skinner, Brian. Interlayer excitons with tunable dispersion relation. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.235110.
Skinner, Brian. Interlayer excitons with tunable dispersion relation. United States. https://doi.org/10.1103/PhysRevB.93.235110
Skinner, Brian. 2016. "Interlayer excitons with tunable dispersion relation". United States. https://doi.org/10.1103/PhysRevB.93.235110. https://www.osti.gov/servlets/purl/1388202.
@article{osti_1388202,
title = {Interlayer excitons with tunable dispersion relation},
author = {Skinner, Brian},
abstractNote = {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.},
doi = {10.1103/PhysRevB.93.235110},
url = {https://www.osti.gov/biblio/1388202}, journal = {Physical Review B},
issn = {2469-9950},
number = 23,
volume = 93,
place = {United States},
year = {Tue Jun 07 00:00:00 EDT 2016},
month = {Tue Jun 07 00:00:00 EDT 2016}
}

Journal Article:

Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

Figures / Tables:

FIG. 1 FIG. 1: Schematic illustration of a composite boson with tunable dispersion relation. A material containing electrons (blue layer) is placed adjacent to a material containing holes (yellow layer), with the electron dispersion relation following Eq. (1) and the hole dispersion relation following Eq. (2). In this configuration the electron andmore » hole can bind together to form an interlayer exciton, which has a dispersion relation that can take a number of qualitatively different forms, depending on the value of k0.« less

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Works referencing / citing this record:

Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.