Giant anomalous transverse transport properties of Co-doped two-dimensional Fe_(3)GaTe_(2)  

作　　者：Imran Khan Jisang Hong 

机构地区：[1]Department of Physics,Pukyong National University,Busan 48513,Republic of Korea

出　　处：《Frontiers of physics》2024年第6期95-106,共12页物理学前沿(英文版)

基　　金：supported by the National Research Foundation of Korea(NRF)grant funded by the Korean government(MSIT)(No.2022R1A2C1004440);the Supercomputing Center/Korea Institute of Science and Technology Information with supercomputing resources including technical support(KSC-2023-CRE-0190).

摘　　要：In spintronics,transverse anomalous transport properties have emerged as a highly promising avenue surpassing the conventional longitudinal trans-port behaviors.Here,we explore the transverse transport properties of monolayer and bilayer Fe_(3-x)Co_(x)GaTe_(2)(x=0.083,0.167,0.250,and 0.330)systems.All the systems exhibit ferromagnetic ground states with metallic features and also have perpendicular magnetic anisotropy.Besides,the magnetic anisotropy is substantially enhanced with increasing Co-doping concentration.However,unlike magnetic anisotropy,the Curie tempera-ture is suppressed by increasing the Co-doping concentration.For instance,the monolayer and bilayer Fe_(2.917)Co_(0.083)GaTe_(2) hold a Curie temperature of 253K and 269K,which decreases to 163K and 173K in monolayer and bilayer Fe_(2.67)Co_(0.3)3GaTe_(2) systems,respectively.We find a giant anomalous Nernst conductivity(ANC)of 6.03 A/(K·m)in the mono-layer Fe_(2.917)Co_(0.083)GaTe_(2) at-30 meV,and this is further enhanced to 11.30 A/(K m)in the bilayer Fe_(2.917)Co_(0.083)GaTe_(2) at-20 meV.Moreover,the bilayer Fe_(2.917)Co_(0.083)GaTe_(2) structure has a large anomalous thermal Hall conductivity(ATHC)of-0.14 W/(K·m)at 100 K.Overall,we find that the Fe_(3-x)Co_(x)GaTe_(2)(x=0.083,0.167,0.250,and 0.330)structures have better anomalous transverse transport performance than the pristine Fe_(3)GaTe_(2) system and can be used for potential spintronics and spin caloritronics applications.

关 键 词：two-dimensional(2D)material FesGaTe2 FERROMAGNETISM magnetic anisotropy Curie temperature anomalous Hall conductivity anomalous Nernst conductivity anomalous thermal Hall conductivity 

分 类 号：O48[理学—固体物理]