Helicity-Controlled Spin Hall Angle in 2D Altermagnets with Rashba Spin-Orbit Coupling  

作　　者：Weiwei Chen Longhai Zeng W.Zhu 

机构地区：[1]Key Laboratory of Intelligent Manufacturing Quality Big Data Tracing and Analysis of Zhejiang Province,College of Sciences,China Jiliang University,Hangzhou 310018,China [2]Key Laboratory of Intelligent Manufacturing Quality Big Data Tracing and Analysis of Zhejiang Province,College of Science,China Jiliang University,Hangzhou 310018,China [3]School of Science,Westlake University,Hangzhou 310024,China

出　　处：《Chinese Physics Letters》2025年第1期134-140,共7页中国物理快报(英文版)

基　　金：supported by the National Key R&D Program(Grant No.2022YFA1402204);the National Natural Science Foundation of China(Grant No.52471020)。

摘　　要：We investigated the efficiency of charge-to-spin conversion in two-dimensional Rashba altermagnets,a class of materials that combines the characteristics of both ferromagnets and antiferromagnets.Using quantum linear response theory,we quantified the longitudinal and spin Hall conductivities in this system and demonstrated a substantial enhancement in the spin Hall angle below the band crossing point through the dual effects of relativistic spin–orbit interaction and nonrelativistic altermagnetic exchange interaction.Additionally,the results showed that the skew scattering and intrinsic mechanisms arising from Fermi sea states are almost negligible in this system,in contrast to conventional ferromagnetic Rashba systems.Our findings not only elucidate the spin dynamics in Rashba altermagnets but also pave the way for developing novel strategies for manipulating charge-to-spin conversion via sophisticated control of noncollinear and collinear out-of-plane spin textures.

关 键 词：interaction MAGNETS RASHBA 

分 类 号：O469[理学—凝聚态物理]