A Magneto‐Reflectivity Study of CuGaSe 2  Single Crystals | Zendy

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

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A Magneto‐Reflectivity Study of CuGaSe 2 Single Crystals

Author(s) -

Yakushev Michael V.,

Mudryi Alexander V.,

Faugeras Clement,

Martin Robert W.

Publication year - 2019

Publication title -

physica status solidi (rrl) – rapid research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.786

H-Index - 68

eISSN - 1862-6270

pISSN - 1862-6254

DOI - 10.1002/pssr.201800374

Subject(s) - exciton , reflectivity , bohr model , anisotropy , spectral line , magnetic field , magneto optical , physics , condensed matter physics , atomic physics , molecular physics , optics , quantum mechanics , astronomy

CuGaSe 2 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 0.115 m 0 and 0.108 m 0 ( m 0 is the free electron mass), Rydbergs of 12.9 and 12.2 meV, Bohr radii 5.08 and 5.4 nm, and effective hole masses of 0.64 m 0 and 0.48 m 0 , respectively, are determined.

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