Schaufuss U, Kataev V, Zvyagin A A, Büchner B, Sichelschmidt J, Wykhoff J, Krellner C, Geibel C, Steglich F
IFW Dresden, Institute for Solid State Research, Post Office Box 270116, D-01171 Dresden, Germany.
Phys Rev Lett. 2009 Feb 20;102(7):076405. doi: 10.1103/PhysRevLett.102.076405.
An electron spin resonance (ESR) study of the heavy fermion compound YbRh2Si2 for fields up to approximately 8 T reveals a strongly anisotropic signal in the Kondo state below approximately 25 K. A similarity between the T dependence of the ESR parameters and that of the specific heat and the 29Si nuclear magnetic resonance data gives evidence that the ESR response is given by heavy fermions. Tuning the Kondo effect on the 4f states with magnetic fields approximately 2-8 T and temperature 2-25 K yields a gradual change of the ESR g factor and linewidth which reflects the evolution of the Kondo state in this Kondo lattice system.
对重费米子化合物YbRh2Si2在高达约8 T的磁场下进行的电子自旋共振（ESR）研究表明，在低于约25 K的近藤态中存在强烈的各向异性信号。ESR参数的温度依赖性与比热以及29Si核磁共振数据的温度依赖性之间的相似性证明，ESR响应由重费米子给出。在约2 - 8 T的磁场和2 - 25 K的温度下调节4f态上的近藤效应，会使ESR g因子和线宽逐渐变化，这反映了该近藤晶格系统中近藤态的演化。
