A magneto‐reflectivity study of CuInTe2 single crystals

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

doi:10.1002/pssb.201900464

A magneto‐reflectivity study of CuInTe₂ single crystals

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

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Abstract

CuInTe ₂ single crystals are studied using optical magneto-reflectance (MR) in magnetic fields B up to 20 T at 4.2 K. The spectra exhibit 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 low field limit allow the determination of diamagnetic shift rates of 8.2 × 10 ⁻⁵ and 8.5 × 10 ⁻⁵ eV T ⁻² for the A and B free excitons, respectively. The excitons' reduced masses of 0.0575m ₀ and 0.0568m ₀ (m ₀ is the free electron mass), Rydbergs of 6.2 and 6.1 meV, and Bohr radii of 10.4 and 10.5 nm are then estimated. An electron effective mass of 0.062m ₀ and B sub-band effective hole mass of 0.70m ₀ are determined using a literature value of the A valence sub-band hole of 0.78m ₀.

Original language	English
Article number	1900464
Number of pages	4
Journal	Physica Status Solidi B
Volume	257
Issue number	1
Early online date	19 Sep 2019
DOIs	https://doi.org/10.1002/pssb.201900464
Publication status	E-pub ahead of print - 19 Sep 2019

Keywords

CuInTe2
excitons
magnetic field
effective masses

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10.1002/pssb.201900464

Yakushev-etal-PSSB-2019-A-magneto-reflectivity-study-of-CuInTe2-singleAccepted author manuscript, 199 KB

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title = "A magneto‐reflectivity study of CuInTe2 single crystals",

abstract = "CuInTe 2 single crystals are studied using optical magneto-reflectance (MR) in magnetic fields B up to 20 T at 4.2 K. The spectra exhibit 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 low field limit allow the determination of diamagnetic shift rates of 8.2 × 10 −5 and 8.5 × 10 −5 eV T −2 for the A and B free excitons, respectively. The excitons' reduced masses of 0.0575m 0 and 0.0568m 0 (m 0 is the free electron mass), Rydbergs of 6.2 and 6.1 meV, and Bohr radii of 10.4 and 10.5 nm are then estimated. An electron effective mass of 0.062m 0 and B sub-band effective hole mass of 0.70m 0 are determined using a literature value of the A valence sub-band hole of 0.78m 0. ",

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

year = "2019",

month = sep,

day = "19",

doi = "10.1002/pssb.201900464",

language = "English",

volume = "257",

journal = "Physica Status Solidi B",

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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 - 2019/9/19

Y1 - 2019/9/19

N2 - CuInTe 2 single crystals are studied using optical magneto-reflectance (MR) in magnetic fields B up to 20 T at 4.2 K. The spectra exhibit 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 low field limit allow the determination of diamagnetic shift rates of 8.2 × 10 −5 and 8.5 × 10 −5 eV T −2 for the A and B free excitons, respectively. The excitons' reduced masses of 0.0575m 0 and 0.0568m 0 (m 0 is the free electron mass), Rydbergs of 6.2 and 6.1 meV, and Bohr radii of 10.4 and 10.5 nm are then estimated. An electron effective mass of 0.062m 0 and B sub-band effective hole mass of 0.70m 0 are determined using a literature value of the A valence sub-band hole of 0.78m 0.

AB - CuInTe 2 single crystals are studied using optical magneto-reflectance (MR) in magnetic fields B up to 20 T at 4.2 K. The spectra exhibit 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 low field limit allow the determination of diamagnetic shift rates of 8.2 × 10 −5 and 8.5 × 10 −5 eV T −2 for the A and B free excitons, respectively. The excitons' reduced masses of 0.0575m 0 and 0.0568m 0 (m 0 is the free electron mass), Rydbergs of 6.2 and 6.1 meV, and Bohr radii of 10.4 and 10.5 nm are then estimated. An electron effective mass of 0.062m 0 and B sub-band effective hole mass of 0.70m 0 are determined using a literature value of the A valence sub-band hole of 0.78m 0.

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 - Article

VL - 257

JO - Physica Status Solidi B

JF - Physica Status Solidi B

SN - 0370-1972

IS - 1

M1 - 1900464

ER -

A magneto‐reflectivity study of CuInTe₂ single crystals

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