Optical observation of non-Fermi-liquid behavior in the heavy fermion state of YbRh2Si2
Optical observation of non-Fermi-liquid behavior in the heavy fermion state of YbRh2Si2
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DOI：
10.1103/physrevb.74.132408
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发表时间：
2006-10-01
影响因子：
3.7
通讯作者：
Steglich, F.
中科院分区：
文献类型：
--
作者：
Kimura, S.;Sichelschmidt, J.;Steglich, F.
我们报道了YbRh2Si2在光子能量低至2 meV，温度为0.4-300 K时的远红外光学性质。在相干重准粒子态，低能散射率与温度和光子能量呈线性关系。我们将这种不同于费米-液体材料的独特动力学行为与YbRh2Si2的非费米-液体性质联系起来，这是由于它靠近反铁磁量子临界点。
We report far-infrared optical properties of YbRh2Si2 for photon energies down to 2 meV and temperatures 0.4-300 K. In the coherent heavy quasiparticle state, a linear dependence of the low-energy scattering rate on both temperature and photon energy was found. We relate this distinct dynamical behavior different from that of Fermi-liquid materials to the non-Fermi-liquid nature of YbRh2Si2 which is due to its close vicinity to an antiferromagnetic quantum critical point.