Abstract
Our theoretical study reveals the dependence of quantum conductance of Au-Co nanowires on their atomic structure. The results show the emergence of spin-filter state in one-dimensional Au-Co bimetallic nanowires. We found the existence of two transmission regime in Au-Co nanowires with low and high conductivity 1G0 and 2G0 for “zig-zag” and linear nanowire correspondingly. The study of transmission spectra of Au-Co nanowires reveals the control capability of spin transport regime by changing of bias voltage between bulk electrodes.
Highlights
Bimetallic atomic wires are the most promising objects for construction of new nanoelectronics and spintronics devices [1, 2]
IBM's labs (Yorktown, New York) by using CMOS technology produced the first prototype of racetrack memory based on “giant magnetoresistance” in vertical magnetic nanowires
The main problem of spintronics is the search for new spin control capabilities in one dimensional nanostructures [7]
Summary
Bimetallic atomic wires are the most promising objects for construction of new nanoelectronics and spintronics devices [1, 2]. The atomic structure and magnetic properties of suspended atomic chain consciously have not been investigated they can have the decisive impact on the electronic transport in the ballistic regime of bimetallic NJ. The study of the magnetic properties of the mixed Au-Co nanowires was carried out using the program Vienna Ab-initio Simulation Package (VASP) which is based on the density functional theory (DFT) [14].
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