Open AccessSi cluster based spintronics:a density functional theory study
Author(s) -
Huang Yao-Qing,
Hao Cheng-Hong,
Zheng Ji-Ming,
Zhaoyu Ren
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.083601
Subject(s) - spintronics , cluster (spacecraft) , condensed matter physics , doping , density functional theory , atom (system on chip) , spin (aerodynamics) , materials science , magnetic moment , spin polarization , electron , magnetic semiconductor , atomic physics , ferromagnetism , physics , quantum mechanics , computer science , programming language , embedded system , thermodynamics
A kind of spintronics is designed by doping the transition metal into Si clusters. Their spin-polarized electron transport properties are investigated by using the first principle analysis. Calculation shows that Fe, Cr and Mn atom doped clusters give the largest spin-polarized transmission coefficients in all the clusters. From Sc to Ni doped clusters, spin filter efficiencies of the systems increase gradually, and the maximal spin filter coefficiency appears in the Fe doped system. The ability to induce the spin-polarized electron transport of the cluster in junction is not cosistent with the magnetic moment of cluster under isolated states.