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Magnetoexcitons in Zn 0.98 Mn 0.02 Te under High Hydrostatic Pressure
Author(s) -
Hamdani F.,
Goñi A.R.,
Syassen K.,
Triboulet R.
Publication year - 2001
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200101)223:1<171::aid-pssb171>3.0.co;2-6
Subject(s) - hydrostatic pressure , superexchange , zeeman effect , condensed matter physics , ion , compressibility , photoluminescence , exchange interaction , spectral line , materials science , lattice (music) , hydrostatic equilibrium , band gap , magnetic field , chemistry , physics , ferromagnetism , thermodynamics , optoelectronics , organic chemistry , quantum mechanics , astronomy , acoustics
We have measured low‐temperature photoluminescence spectra of cubic Zn 0.98 Mn 0.02 Te in high magnetic fields up to 14 T and at hydrostatic pressures up to 3 GPa. From the variation with pressure of the Zeeman shift of the excitonic recombination at the fundamental band gap we determine the volume dependence of the hole–ion exchange interaction and the effective superexchange temperature parameter of the magnetic ions. We find a strikingly large increase of both parameters with pressure, which can be explained by assuming a larger local compressibility near Mn ions compared to the bulk elastic properties of the ZnTe host lattice.