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VOLUME 34 (1981) | ISSUE 1 | PAGE 36
Bose gas of spin-oriented excitons in uniaxially deformed germanium
A narrowing of the spontaneous, indirect exciton-annihilation line with increasing density of Optical excitation has been detected in uniaxially compressed Ge crystals in a magnetic field that orients the spin of the electrons and holes in the excitons. The observed changes in the exciton-phonon radiation spectrum of the high-density exciton gas are explained in terms of the nonideal Bose gas.