Spin transport of half-metal Mn_(2)X_(3) with high Curie temperature:An ideal giant magnetoresistance device from electrical and thermal drives  

作　　者：Bin Liu Xiaolin Zhang Jingxian Xiong Xiuyang Pang Sheng Liu Zixin Yang Qiang Yu Honggen Li Sicong Zhu Jian Wu 

机构地区：[1]Hubei Province Key Laboratory of Systems Science in Metallurgical Process,The State Key Laboratory for Refractories and Metallurgy,Collaborative Innovation Center for Advanced Steels,International Research Institute for Steel Technology,Wuhan University of Science and Technology,Wuhan 430081,China [2]Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physical and Technology,Wuhan University,Wuhan 430072,China [3]College of Advanced Interdisciplinary Studies,Nanhu Laser Laboratory,National University of Defense Technology,Changsha 410073,China [4]Department of Mechanical Engineering,National University of Singapore,Singapore 117575,Singapore [5]i-Lab&Key Laboratory of Nanodevices and Applications&Key Laboratory of Nanophotonic Materials and Devices,Suzhou Institute of Nano-Tech and NanoBionics,Chinese Academy of Sciences,Suzhou 215123,China [6]Institute of Optical Science and Technology,School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Frontiers of physics》2024年第4期125-135,共11页物理学前沿（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Nos.11704291 and 12174296);the Hubei Province Key Laboratory of Systems Science in Metallurgical Process of Wuhan University of Science and Technology(Grant Nos.Y202101 and Y202208);the Scientific research project of Education Department of Hubei Province(Grant No.2022024);the Postgraduate Scientific Research Innovation Project of Hunan Province(Grant No.QL20230006);the High-Performance Computing Center of Wuhan University of Science and Technology.S.C.Z.also acknowledges the support from China Scholarship Council.

摘　　要：Currently,magnetic storage devices are encountering the problem of achieving lightweight and high integration in mobile computing devices during the information age.As a result,there is a growing urgency for twodimensional half-metallic materials with a high Curie temperature(TC).This study presents a theoretical investigation of the fundamental electromagnetic properties of the monolayer hexagonal lattice of Mn_(2)X_(3)(X=S,Se,Te).Additionally,the potential application of Mn_(2)X_(3) as magneto-resistive components is explored.All three of them fall into the category of ferromagnetic half-metals.In particular,the Monte Carlo simulations indicate that the TC of Mn2S3 reachs 381 K,noticeably greater than room temperature.These findings present notable advantages for the application of Mn2S3 in spintronic devices.Hence,a prominent spin filtering effect is apparent when employing non-equilibrium Green’s function simulations to examine the transport parameters.The resulting current magnitude is approximately 2×10^(4) nA,while the peak gigantic magnetoresistance exhibits a substantial value of 8.36×10^(16)%.It is noteworthy that the device demonstrates a substantial spin Seebeck effect when the temperature differential between the electrodes is modified.In brief,Mn_(2)X_(3) exhibits outstanding features as a highTC half-metal,exhibiting exceptional capabilities in electrical and thermal drives spin transport.Therefore,it holds great potential for usage in spintronics applications.

关 键 词：HALF-METALS Mn_(2)X_(3) high Curie temperature electrical and thermal GMR 

分 类 号：O46[理学—电子物理学]