title: Determination of the optical gap bowing parameter for ternary Ni1-xZnxO cubic rocksalt solid solutions.
abstract: The lattice parameter variation for phase pure cubic rocksalt (RS) Ni1-xZnxO ternary solid solutions is observed to be perfectly governed by Vegard's law. X-ray absorption near edge spectroscopy confirms the RS symmetry of Zn atoms in the cubic lattice of Ni1-xZnxO. The optical gap bowing parameter for RS Ni1-xZnxO ternary solid solutions is determined, using diffuse reflectivity, to be -0.93 ± 0.05 eV. The negative value of the bowing indicates a repulsive interaction between the ligand O-2p and the metal Ni-3d orbitals. The determined value of the bowing parameter can be useful in designing UV photodetectors based on Ni1-xZnxO solid solutions.
authors.affiliation: Raja Ramanna Centre for Advanced Technology, Indore, Madhya Pradesh-452013, India. devsh@rrcat.gov.in.
authors.forename: S D
authors.initials: SD
authors.lastname: Singh
authors.forename: V
authors.initials: V
authors.lastname: Nandanwar
authors.forename: Himanshu
authors.initials: H
authors.lastname: Srivastava
authors.forename: A K
authors.initials: AK
authors.lastname: Yadav
authors.forename: Ashok
authors.initials: A
authors.lastname: Bhakar
authors.forename: P R
authors.initials: PR
authors.lastname: Sagdeo
authors.forename: A K
authors.initials: AK
authors.lastname: Sinha
authors.forename: Tapas
authors.initials: T
authors.lastname: Ganguli