A magneto‐reflectivity study of CuGaSe2 single crystals

Michael V. Yakushev; Alexander V. Mudryi; Clement Faugeras; Robert W. Martin

doi:10.1002/pssr.201800374

A magneto‐reflectivity study of CuGaSe₂ single crystals

Michael V. Yakushev, Alexander V. Mudryi, Clement Faugeras, Robert W. Martin

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Abstract

CuGaSe₂ single crystals are studied using magneto-reflectivity at 4.2 K in magnetic fields B up to 20 T. The A and B free excitons, observed in the optical reflectivity spectra, blue shift with increasing B. A low-field perturbation approach within the anisotropic hydrogenic model is used to fit the dependence of the spectral position of these excitons on B. The A and B exciton reduced masses of 0.115m0 and 0.108m0 (m0 is the free electron mass), Rydbergs of 12.9 and 12.2meV, Bohr radii 5.08 and 5.4 nm, and effective hole masses of 0.64m0 and 0.48m0, respectively, are determined.

Original language	English
Article number	1800374
Number of pages	4
Journal	Physica Status Solidi (RRL) - Rapid Research Letters
Volume	13
Issue number	2
Early online date	29 Oct 2018
DOIs	https://doi.org/10.1002/pssr.201800374
Publication status	Published - 28 Feb 2019

Keywords

CuGaSe2
excitons
magnetic field

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Yakushev-etal-PSSRRL-2018-A-magneto-reflectivity-study-of-CuGaSe2-single-crystalsAccepted author manuscript, 553 KB

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title = "A magneto‐reflectivity study of CuGaSe2 single crystals",

abstract = "CuGaSe2 single crystals are studied using magneto-reflectivity at 4.2 K in magnetic fields B up to 20 T. The A and B free excitons, observed in the optical reflectivity spectra, blue shift with increasing B. A low-field perturbation approach within the anisotropic hydrogenic model is used to fit the dependence of the spectral position of these excitons on B. The A and B exciton reduced masses of 0.115m0 and 0.108m0 (m0 is the free electron mass), Rydbergs of 12.9 and 12.2meV, Bohr radii 5.08 and 5.4 nm, and effective hole masses of 0.64m0 and 0.48m0, respectively, are determined.",

keywords = "CuGaSe2, excitons, magnetic field",

author = "Yakushev, {Michael V.} and Mudryi, {Alexander V.} and Clement Faugeras and Martin, {Robert W.}",

year = "2019",

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doi = "10.1002/pssr.201800374",

language = "English",

volume = "13",

journal = "Physica Status Solidi (RRL) - Rapid Research Letters ",

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TY - JOUR

T1 - A magneto‐reflectivity study of CuGaSe2 single crystals

AU - Yakushev, Michael V.

AU - Mudryi, Alexander V.

AU - Faugeras, Clement

AU - Martin, Robert W.

PY - 2019/2/28

Y1 - 2019/2/28

N2 - CuGaSe2 single crystals are studied using magneto-reflectivity at 4.2 K in magnetic fields B up to 20 T. The A and B free excitons, observed in the optical reflectivity spectra, blue shift with increasing B. A low-field perturbation approach within the anisotropic hydrogenic model is used to fit the dependence of the spectral position of these excitons on B. The A and B exciton reduced masses of 0.115m0 and 0.108m0 (m0 is the free electron mass), Rydbergs of 12.9 and 12.2meV, Bohr radii 5.08 and 5.4 nm, and effective hole masses of 0.64m0 and 0.48m0, respectively, are determined.

AB - CuGaSe2 single crystals are studied using magneto-reflectivity at 4.2 K in magnetic fields B up to 20 T. The A and B free excitons, observed in the optical reflectivity spectra, blue shift with increasing B. A low-field perturbation approach within the anisotropic hydrogenic model is used to fit the dependence of the spectral position of these excitons on B. The A and B exciton reduced masses of 0.115m0 and 0.108m0 (m0 is the free electron mass), Rydbergs of 12.9 and 12.2meV, Bohr radii 5.08 and 5.4 nm, and effective hole masses of 0.64m0 and 0.48m0, respectively, are determined.

KW - CuGaSe2

KW - excitons

KW - magnetic field

UR - https://onlinelibrary.wiley.com/journal/18626270

U2 - 10.1002/pssr.201800374

DO - 10.1002/pssr.201800374

M3 - Letter

VL - 13

JO - Physica Status Solidi (RRL) - Rapid Research Letters

JF - Physica Status Solidi (RRL) - Rapid Research Letters

SN - 1862-6254

IS - 2

M1 - 1800374

ER -

A magneto‐reflectivity study of CuGaSe₂ single crystals

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