A magneto‐reflectivity study of CuInTe2 single crystals

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

Research output: Contribution to journalArticle

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.

LanguageEnglish
Number of pages4
JournalPhysica Status Solidi B
DOIs
Publication statusAccepted/In press - 13 Aug 2019

Fingerprint

Excitons
excitons
Single crystals
reflectance
single crystals
Magnetic fields
Electrons
electron mass
magnetic fields
free electrons
valence
radii
LDS 751
shift
electrons
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.
@article{8cdfeeb9d25d43c3bc7c1fef5ba782d8,
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.",
keywords = "CuInTe2, excitons, magnetic field, effective masses",
author = "Yakushev, {Michael V.} and Clement Faugeras and Mudryi, {Alexander V.} and Martin, {Robert W.}",
year = "2019",
month = "8",
day = "13",
doi = "10.1002/pssb.201900464",
language = "English",
journal = "Physica Status Solidi B",
issn = "0370-1972",

}

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 journalArticle

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 - 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

JO - Physica Status Solidi B

T2 - Physica Status Solidi B

JF - Physica Status Solidi B

SN - 0370-1972

ER -