中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Evidence of a Kondo Destroying Quantum Critical Point in YbRh2Si2

文献类型:期刊论文

作者Steglich, F ; Pfau, H ; Lausberg, S ; Hamann, S ; Sun, PJ ; Stockert, U ; Brando, M ; Friedemann, S ; Krellner, C ; Geibel, C ; Wirth, S ; Kirchner, S ; Abrahams, E ; Si, QM
刊名JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
出版日期2014
卷号83期号:6
ISSN号0031-9015
通讯作者Steglich, F (reprint author), Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany.
中文摘要The heavy-fermion metal YbRh2Si2 is a weak antiferromagnet below T-N = 0.07 K. Application of a low magnetic field B-c = 0.06 T (perpendicular to c) is sufficient to continuously suppress the antiferromagnetic (AF) order. Below T approximate to 10 K, the Sommerfeld coefficient of the electronic specific heat gamma(T) exhibits a logarithmic divergence. At T < 0.3 K, gamma(T) similar to T-epsilon (epsilon : 0.3-0.4), while the electrical resistivity rho(T) = rho(0) + aT (rho(0): residual resistivity). Upon extrapolating finite-T data of transport and thermodynamic quantities to T = 0, one observes (i) a vanishing of the "Fermi surface crossover" scale T* (B), (ii) an abrupt jump of the initial Hall coefficient R-H(B) and (iii) a violation of the Wiedemann Franz law at B = B-c, the field-induced quantum critical point (QCP). These observations are interpreted as evidence of a critical destruction of the heavy quasiparticles, i. e., propagating Kondo singlets, at the QCP of this material.
资助信息DFG [FOR 960]; NSF [DMR-1309531]; Robert A. Welch Grant [C-1411]
语种英语
公开日期2015-04-14
源URL[http://ir.iphy.ac.cn/handle/311004/59295]  
专题物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式
GB/T 7714
Steglich, F,Pfau, H,Lausberg, S,et al. Evidence of a Kondo Destroying Quantum Critical Point in YbRh2Si2[J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN,2014,83(6).
APA Steglich, F.,Pfau, H.,Lausberg, S.,Hamann, S.,Sun, PJ.,...&Si, QM.(2014).Evidence of a Kondo Destroying Quantum Critical Point in YbRh2Si2.JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN,83(6).
MLA Steglich, F,et al."Evidence of a Kondo Destroying Quantum Critical Point in YbRh2Si2".JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 83.6(2014).

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来源:物理研究所

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