Fermionic Critical Fluctuations: Potential Driver of Strange Metallicity and Violation of the Wiedemann-Franz Law in YbRh_(2)Si_(2)  

作　　者：Frank Steglich 

机构地区：[1]Max Planck Institute for Chemical Physics of Solids(MPI CPfS),01187 Dresden,Germany [2]Center for Correlated Matter(CCM)and School of Physics,Zhejiang University,Hangzhou 310058,China

出　　处：《Chinese Physics Letters》2024年第12期155-158,共4页中国物理快报（英文版）

摘　　要：Results of combined thermal and electrical transport measurements through the magnetic field-induced quantum critical point(QCP)in the heavy-fermion compound YbRh_(2)Si_(2) were revisited to explore the relationship between the strange-metal behavior observed in electrical and electronic thermal resistivities and the violation of the Wiedemann-Franz(WF)law in the zero-temperature limit.A new type of inelastic scattering center for the charge and heat carriers was detected,attributed to small-to-large Fermi surface fluctuations operating near the Kondo-destroying QCP.These fermionic quantum critical fluctuations are considered the primary driver of the strange-metal behavior and the violation of the WF law.

关 键 词：FERMI quantum CRITICAL 

分 类 号：O413[理学—理论物理]