A magneto‐reflectivity study of CuGaSe2 single crystals

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

Research output: Contribution to journalLetter

1 Citation (Scopus)

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.
LanguageEnglish
Article number1800374
Number of pages4
JournalPhysica Status Solidi (RRL) - Rapid Research Letters
Volume13
Issue number2
Early online date29 Oct 2018
DOIs
Publication statusPublished - 28 Feb 2019

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Excitons
excitons
Single crystals
reflectance
single crystals
electron mass
blue shift
free electrons
Magnetic fields
perturbation
radii
Electrons
magnetic fields
LDS 751

Keywords

  • CuGaSe2
  • excitons
  • magnetic field

Cite this

Yakushev, Michael V. ; Mudryi, Alexander V. ; Faugeras, Clement ; Martin, Robert W. / A magneto‐reflectivity study of CuGaSe2 single crystals. In: Physica Status Solidi (RRL) - Rapid Research Letters . 2019 ; Vol. 13, No. 2.
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A magneto‐reflectivity study of CuGaSe2 single crystals. / Yakushev, Michael V.; Mudryi, Alexander V.; Faugeras, Clement; Martin, Robert W.

In: Physica Status Solidi (RRL) - Rapid Research Letters , Vol. 13, No. 2, 1800374, 28.02.2019.

Research output: Contribution to journalLetter

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

T2 - Physica Status Solidi (RRL) - Rapid Research Letters

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

SN - 1862-6254

IS - 2

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ER -