Huge magnetoresistance induced by half-metal-semiconductor phase transition in a one-dimensional spin chain: a first-principles study.
In experimental studies, magnetoresistance (MR) values of 103are hard to reach for conventional single-molecule spin-valves. Motivated by a recent experiment [Nano Lett., 2016, 16, 577-582], where tailored Co-salophene-based all-spin molecular devices are successfully realized, we demonstrate the functionality of a Co-salophene-based spin chain without magnetic electrodes. By using nonequilibrium Green's functions in combination with density functional theory, we find that the maximum MR ratio of this spin chain can reach 106by manipulating its spins in a controlled way, which is several orders of magnitude higher than previously reported experimental values. As the Co-salophene-based spin chain has been successfully synthesized, we are highly expectant of the experimental realization of huge MR ratios.
College of Physics and Electronic Engineering, Hengyang Normal University, Hengyang 421002, People's Republic of China. zengjing@hynu.edu.cn and Hunan Provincial Key Laboratory of Intelligent Information Processing and Application, Hengyang 421002, People's Republic of China.
Jing
http://orcid.org/0000-0002-7453-5513
J
Zeng
Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, People's Republic of China. keqiuchen@hnu.edu.cn.
Ke-Qiu
KQ
Chen