Band Edge Energies Pinning in Magnetic Field in Semimagnetic Cd_{0.7}Mn_{0.3}Te

• Authors: L. Barauskaitė , R. Brazis , V. Ivanov , M. Godlewski
• Languages of publication: EN

Abstracts

EN

Results of Cd_{0.7}Mn_{0.3}Te magneto-photoluminescence investigations are analyzed. Photoluminescence was measured in a Voigt geometry at the temperature of 1.6 K. Two models describing radiative transition energy are compared with the experimental results of Cd_{0.7}Mn_{0.3}Te luminescence. The energy of recombination transition, employing the complete form of band states splitting description (term due to the Landau splitting included), shows deviation from experiment at B > 2 T. Two possible reasons of discrepancies from the experiment - exchange interaction constants dependence on magnetic field or band edge energies pinning in magnetic field - are discussed. Band edge energies pinning in magnetic field is related to the hybridization of Mn 3 d^{5} levels with the band states of the host. We determine the corrected values of exchange interaction constants (N_0 α -N_0 β/3) at magnetic fields B < 5 T.

Keywords

EN

78.55.Et; 75.50.Pp; 71.70.-d

Discipline

• 71.70.-d: Level splitting and interactions(see also 73.20.-r Surface and interface electron states; 75.30.Et Exchange and superexchange interactions)
• 78.55.Et: II-VI semiconductors
• 75.50.Pp: Magnetic semiconductors

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2011
• Volume: 120
• Issue: 6
• Pages: 1056-1060

Dates

published

2011-12

received

2010-11-12

(unknown)

2011-07-08

Contributors

author

L. Barauskaitė

• Center of Physical Sciences and Technology, A. Goštauto 11, 01108 Vilnius, Lithuania

author

R. Brazis

• Center of Physical Sciences and Technology, A. Goštauto 11, 01108 Vilnius, Lithuania

author

V. Ivanov

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

M. Godlewski

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

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Identifiers

DOI

10.12693/APhysPolA.120.1056