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Effects of Nitrogen Defect on Magnetism of Cu-doped InN: First-principles Calculations

Journal of Magnetics, Volume 18, Number 2, 30 Jun 2013, Pages 81-85

Byung-Sub Kang *

(Department of Nano Science and Mechanical Engineering, Konkuk University), Kwang-Pyo Chae *

(Department of Nano Science and Mechanical Engineering, Konkuk University), Haeng-Ki Lee (Department of Radiotechnology, Suseong College)

Abstract

We investigate the electronic and magnetic properties in Cu-doped InN with the N vacancy (V_N) from first
principles calculations. There is the long-range ferromagnetic order between two Cu atoms, attributed to the hole-mediated double exchange through the strong p-d interaction between the Cu atom and neighboring N atom. The system of V_N defect in Cu-doped InN has the lowest formation energy. Due to the hybridization between the Cu-3d and V_N states, the spin-polarization on the Cu atoms in the InN lattice is reduced by V_N defect. So, it shows a weak ferromagnetic behavior.

Keywords: Cu-doped InN; first-principles; nitrogen defect; ferromagnetism

DOI: http://dx.doi.org/10.4283/JMAG.2013.18.2.081

Full Text: PDF

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