A magneto‐reflectivity study of CuInTe2 single crystals

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

Research output: Contribution to journalLetter

Abstract

CuInTe2 single crystals were studied using optical magneto-reflectance (MR) in magnetic fields B up to 20 T at 4.2 K. The spectra exhibited the A and B free excitons blue shifting at increasing magnetic fields. Fitting quadratic functions to the experimental dependencies of the exciton spectral energy on B assuming a lowfield limit allowed determination of diamagnetic shift rates of 8.2˟10-5 eV/T2 and 8.5˟10-5 eV/T2 for the A and B free excitons, respectively. Exciton reduced masses of 0.0575m0 and 0.0568m0 (m0 is the free electron mass), Rydbergs of 6.2 meV and 6.1 meV, and Bohr radii 10.4 nm and 10.5 nm were then estimated. An electron effective mass of 0.062m0 and B sub-band effective hole mass of 0.70m0 were determined using a literature value of the A valence sub-band hole of 0.78m.
LanguageEnglish
Number of pages4
JournalPhysica Status Solidi B
DOIs
Publication statusAccepted/In press - 13 Aug 2019

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Excitons
excitons
Single crystals
reflectance
single crystals
Magnetic fields
magnetic fields
valence
radii
LDS 751
shift
energy

Keywords

  • CuInTe2
  • excitons
  • magnetic field
  • effective masses

Cite this

Yakushev, Michael V. ; Faugeras, Clement ; Mudryi, Alexander V. ; Martin, Robert W. / A magneto‐reflectivity study of CuInTe2 single crystals. In: Physica Status Solidi B. 2019.
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title = "A magneto‐reflectivity study of CuInTe2 single crystals",
abstract = "CuInTe2 single crystals were studied using optical magneto-reflectance (MR) in magnetic fields B up to 20 T at 4.2 K. The spectra exhibited the A and B free excitons blue shifting at increasing magnetic fields. Fitting quadratic functions to the experimental dependencies of the exciton spectral energy on B assuming a lowfield limit allowed determination of diamagnetic shift rates of 8.2˟10-5 eV/T2 and 8.5˟10-5 eV/T2 for the A and B free excitons, respectively. Exciton reduced masses of 0.0575m0 and 0.0568m0 (m0 is the free electron mass), Rydbergs of 6.2 meV and 6.1 meV, and Bohr radii 10.4 nm and 10.5 nm were then estimated. An electron effective mass of 0.062m0 and B sub-band effective hole mass of 0.70m0 were determined using a literature value of the A valence sub-band hole of 0.78m0 .",
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A magneto‐reflectivity study of CuInTe2 single crystals. / Yakushev, Michael V.; Faugeras, Clement; Mudryi, Alexander V.; Martin, Robert W.

In: Physica Status Solidi B, 13.08.2019.

Research output: Contribution to journalLetter

TY - JOUR

T1 - A magneto‐reflectivity study of CuInTe2 single crystals

AU - Yakushev, Michael V.

AU - Faugeras, Clement

AU - Mudryi, Alexander V.

AU - Martin, Robert W.

PY - 2019/8/13

Y1 - 2019/8/13

N2 - CuInTe2 single crystals were studied using optical magneto-reflectance (MR) in magnetic fields B up to 20 T at 4.2 K. The spectra exhibited the A and B free excitons blue shifting at increasing magnetic fields. Fitting quadratic functions to the experimental dependencies of the exciton spectral energy on B assuming a lowfield limit allowed determination of diamagnetic shift rates of 8.2˟10-5 eV/T2 and 8.5˟10-5 eV/T2 for the A and B free excitons, respectively. Exciton reduced masses of 0.0575m0 and 0.0568m0 (m0 is the free electron mass), Rydbergs of 6.2 meV and 6.1 meV, and Bohr radii 10.4 nm and 10.5 nm were then estimated. An electron effective mass of 0.062m0 and B sub-band effective hole mass of 0.70m0 were determined using a literature value of the A valence sub-band hole of 0.78m0 .

AB - CuInTe2 single crystals were studied using optical magneto-reflectance (MR) in magnetic fields B up to 20 T at 4.2 K. The spectra exhibited the A and B free excitons blue shifting at increasing magnetic fields. Fitting quadratic functions to the experimental dependencies of the exciton spectral energy on B assuming a lowfield limit allowed determination of diamagnetic shift rates of 8.2˟10-5 eV/T2 and 8.5˟10-5 eV/T2 for the A and B free excitons, respectively. Exciton reduced masses of 0.0575m0 and 0.0568m0 (m0 is the free electron mass), Rydbergs of 6.2 meV and 6.1 meV, and Bohr radii 10.4 nm and 10.5 nm were then estimated. An electron effective mass of 0.062m0 and B sub-band effective hole mass of 0.70m0 were determined using a literature value of the A valence sub-band hole of 0.78m0 .

KW - CuInTe2

KW - excitons

KW - magnetic field

KW - effective masses

UR - https://onlinelibrary.wiley.com/journal/15213951

U2 - 10.1002/pssb.201900464

DO - 10.1002/pssb.201900464

M3 - Letter

JO - Physica Status Solidi B

T2 - Physica Status Solidi B

JF - Physica Status Solidi B

SN - 0370-1972

ER -