OPTICAL STUDY OF MN-2+ INTRAIONIC TRANSITIONS IN ZINCBLENDE MNTE

Mn2+ d-d* multiplet transitions in zinc-blende MnTe were studied with photoluminescence, absorption, and magnetic circular dichroism spectroscopy. A simple ligand-field theory with Racah parameters, B = 0. 045 91 eV, C = 0. 4363 eV, and Dq = 0. 077 63 eV, can well reproduce the observed absorption bands from 6A1(6S) to 4T1(4 G), 4T2(4G), 4A1(4 G), 4E(4G), 4T2(4D), 4E(4D), and 2T2(2I) multiplets. The magnetic circular dichroism spectrum clearly showed the existence of the Zeeman effect for Mn2+ multiplet transitions. The effective g value of Mn2+ multiplets was roughly estimated to be approximately 2.2, which implies that the strong optical-absorption bands of Mn2+ d-d* multiplets are nonmagnon sideband-type transitions.