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  • ValleydegeneracybreakingbymagneticfieldinmonolayerMoSe2

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  • MoSe2

    Rights statement: © 2015 American Physical Society

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Breaking of valley degeneracy by magnetic field in monolayer MoSe2

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Breaking of valley degeneracy by magnetic field in monolayer MoSe2. / MacNeill, David; Heikes, Colin; Mak, Kin Fai et al.
In: Physical review letters, Vol. 114, No. 3, 037401, 22.01.2015.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

MacNeill, D, Heikes, C, Mak, KF, Anderson, Z, Kormanyos, A, Zolyomi, V, Park, J & Ralph, DC 2015, 'Breaking of valley degeneracy by magnetic field in monolayer MoSe2', Physical review letters, vol. 114, no. 3, 037401. https://doi.org/10.1103/PhysRevLett.114.037401

APA

MacNeill, D., Heikes, C., Mak, K. F., Anderson, Z., Kormanyos, A., Zolyomi, V., Park, J., & Ralph, D. C. (2015). Breaking of valley degeneracy by magnetic field in monolayer MoSe2. Physical review letters, 114(3), Article 037401. https://doi.org/10.1103/PhysRevLett.114.037401

Vancouver

MacNeill D, Heikes C, Mak KF, Anderson Z, Kormanyos A, Zolyomi V et al. Breaking of valley degeneracy by magnetic field in monolayer MoSe2. Physical review letters. 2015 Jan 22;114(3):037401. doi: 10.1103/PhysRevLett.114.037401

Author

MacNeill, David ; Heikes, Colin ; Mak, Kin Fai et al. / Breaking of valley degeneracy by magnetic field in monolayer MoSe2. In: Physical review letters. 2015 ; Vol. 114, No. 3.

Bibtex

@article{59fa3161daad4c4cb170a29795454f7f,
title = "Breaking of valley degeneracy by magnetic field in monolayer MoSe2",
abstract = "Using polarization-resolved photoluminescence spectroscopy, we investigate the breaking of valley degeneracy by an out-of-plane magnetic field in back-gated monolayer MoSe2 devices. We observe a linear splitting of -0.22 meV/T between luminescence peak energies in sigma(+) and sigma(-) emission for both neutral and charged excitons. The optical selection rules of monolayer MoSe2 couple the photon handedness to the exciton valley degree of freedom; so this splitting demonstrates valley degeneracy breaking. In addition, we find that the luminescence handedness can be controlled with a magnetic field to a degree that depends on the back-gate voltage. An applied magnetic field, therefore, provides effective strategies for control over the valley degree of freedom.",
keywords = "SPIN-LATTICE RELAXATION, QUANTUM-WELLS, DIAMAGNETIC SHIFT, EXCITONS, CDTE, POLARIZATION, TRANSITION, ELECTRONS",
author = "David MacNeill and Colin Heikes and Mak, {Kin Fai} and Zachary Anderson and Andor Kormanyos and Viktor Zolyomi and Jiwoong Park and Ralph, {Daniel C.}",
note = "{\textcopyright} 2015 American Physical Society",
year = "2015",
month = jan,
day = "22",
doi = "10.1103/PhysRevLett.114.037401",
language = "English",
volume = "114",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "3",

}

RIS

TY - JOUR

T1 - Breaking of valley degeneracy by magnetic field in monolayer MoSe2

AU - MacNeill, David

AU - Heikes, Colin

AU - Mak, Kin Fai

AU - Anderson, Zachary

AU - Kormanyos, Andor

AU - Zolyomi, Viktor

AU - Park, Jiwoong

AU - Ralph, Daniel C.

N1 - © 2015 American Physical Society

PY - 2015/1/22

Y1 - 2015/1/22

N2 - Using polarization-resolved photoluminescence spectroscopy, we investigate the breaking of valley degeneracy by an out-of-plane magnetic field in back-gated monolayer MoSe2 devices. We observe a linear splitting of -0.22 meV/T between luminescence peak energies in sigma(+) and sigma(-) emission for both neutral and charged excitons. The optical selection rules of monolayer MoSe2 couple the photon handedness to the exciton valley degree of freedom; so this splitting demonstrates valley degeneracy breaking. In addition, we find that the luminescence handedness can be controlled with a magnetic field to a degree that depends on the back-gate voltage. An applied magnetic field, therefore, provides effective strategies for control over the valley degree of freedom.

AB - Using polarization-resolved photoluminescence spectroscopy, we investigate the breaking of valley degeneracy by an out-of-plane magnetic field in back-gated monolayer MoSe2 devices. We observe a linear splitting of -0.22 meV/T between luminescence peak energies in sigma(+) and sigma(-) emission for both neutral and charged excitons. The optical selection rules of monolayer MoSe2 couple the photon handedness to the exciton valley degree of freedom; so this splitting demonstrates valley degeneracy breaking. In addition, we find that the luminescence handedness can be controlled with a magnetic field to a degree that depends on the back-gate voltage. An applied magnetic field, therefore, provides effective strategies for control over the valley degree of freedom.

KW - SPIN-LATTICE RELAXATION

KW - QUANTUM-WELLS

KW - DIAMAGNETIC SHIFT

KW - EXCITONS

KW - CDTE

KW - POLARIZATION

KW - TRANSITION

KW - ELECTRONS

U2 - 10.1103/PhysRevLett.114.037401

DO - 10.1103/PhysRevLett.114.037401

M3 - Journal article

VL - 114

JO - Physical review letters

JF - Physical review letters

SN - 0031-9007

IS - 3

M1 - 037401

ER -