Journal
APPLIED PHYSICS LETTERS
Volume 90, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2431548
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The authors report on the growth of spinel ZnM(d(6))(2)O-4 (M=Co, Rh, and Ir), a p-type wide band gap semiconductor by pulsed laser deposition. The band gap of these compounds is determined by the ligand field splitting in the subbands of the metallic d(6) cation. Photoemission spectroscopy revealed that the valence band maximum is composed of occupied t(2g)(6) states. The observed band gap is increasing for higher quantum numbers, being as large as similar to 3 eV for ZnIr2O4, which is expected from theoretical predictions. Grown in polycrystalline phase, films of these materials display high conductivity, well above 2 S cm(-1). (c) 2007 American Institute of Physics.
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