The effect of Hubbard potential on effective mass of carriers in doped Indium oxide

Rahnamaye Aliabad H. A and H. Arabshahi ()
Additional contact information
Rahnamaye Aliabad H. A: Department of Physics,Sabzevar Tarbiat Moalem University, Sabzevar, Iran
H. Arabshahi: Corresponding author, Department of Physics,Payame Noor University, Tehran, Iran

Journal of Asian Scientific Research, 2011, vol. 1, issue 8, pages 427-440

Abstract: Structural and electronic properties of pure In2O3 and its alloys with Sc, Y, La and Ac including the band gap, the effective mass and the effect of dopant ionic radius have been investigated using density functional theory (DFT). The full potential linearized augmented plane wave (FL-LAPW) method was used with the local density approximation (LDA+U). The calculated results indicated that substituting indium atoms by these dopants have a significant influence on the structural and electronic properties of alloyed In2O3 crystals. Lattice parameters expand as a function of dopant ionic radii in the order Sc (9.987Å) < In (10.057Å) < Y (10.187Å) < La (10.446 Å) < Ac (10.546 Å) except for Sc dopant Sc (9.987Å) that shrinks. The band gap is increased with Sc and Y dopant while with Ac and La dopants decreases. The calculations have indicated that there are two band gaps for In2O3. One with a strong optical absorption, as direct band gap occurs from 0.81eV energy level below the top of valence band. The second is a much weaker absorption from top of the valence to the bottom of conduction band. The value of the electron effective mass in the bottom of conduction bands is increased for alloys In2O3. The results show that In 5s states do not have significant hybridization with Sc 4s, Y 5s, La 6s and Ac 7s states.

Date: 2011
References: View complete reference list from CitEc
Citations Track citations by RSS feed

Downloads: (external link)
http://www.aessweb.com/download.php?id=1120 (application/pdf)
http://www.aessweb.com/archives.php?m=December&id=1120 (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: http://EconPapers.repec.org/RePEc:asi:joasrj:2011:p:427-440

Access Statistics for this article

Journal of Asian Scientific Research is edited by Dr. RAMANI. K

More articles in Journal of Asian Scientific Research from Asian Economic and Social Society
Address: Sadeeq Block, Near Fawara Chowk, Abbasia Town, Rahim Yar Khan - 64200, Punjab, Pakistan
Series data maintained by Qazi Muhammad Imran ().