SYRBU, N. N.; PARVAN, V. I.; URSAKI, V. V.
(ELSEVIER, 2012)
Exciton states with a large oscillator strength (transverse–longitudinal splitting of 50meV) and binding energy of 290meV have been observed in PbGa2S4 crystals. The ground exciton states are stable up to the room temperature. ...