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兰州大学机构库  > 物理科学与技术学院  > 期刊论文
题名: Superfluid response in heavy fermion superconductors
作者: Zhong, Y; Zhang, L; Shao, C; Luo, HG
收录类别: SCIE
出版日期: 2017-10
刊名: FRONTIERS OF PHYSICS
卷号: 12, 期号:1-5
期刊主办单位: 高等教育出版社
出版者: HIGHER EDUCATION PRESS
出版地: BEIJING
英文摘要: Motivated by a recent London penetration depth measurement [H. Kim, et al., Phys. Rev. Lett. 114, 027003 (2015)] and novel composite pairing scenario [O. Erten, R. Flint, and P. Coleman, Phys. Rev. Lett. 114, 027002 (2015)] of the Yb-doped heavy fermion superconductor CeCoIn 5, we revisit the issue of superfluid response in the microscopic heavy fermion lattice model. However, from the literature, an explicit expression for the superfluid response function in heavy fermion superconductors is rare. In this paper, we investigate the superfluid density response function in the celebrated KondoHeisenberg model. To be specific, we derive the corresponding formalism from an effective fermionic large-N mean-field pairing Hamiltonian whose pairing interaction is assumed to originate from the effective local antiferromagnetic exchange interaction. Interestingly, we find that the physically correct, temperature-dependent superfluid density formula can only be obtained if the external electromagnetic field is directly coupled to the heavy fermion quasi-particle rather than the bare conduction electron or local moment. Such a unique feature emphasizes the key role of the Kondo-screening-renormalized heavy quasi-particle for low-temperature/energy thermodynamics and transport behaviors. As an important application, the theoretical result is compared to an experimental measurement in heavy fermion superconductors CeCoIn 5 and Yb-doped Ce1-xYbx CoIn5 with fairly good agreement and the transition of the pairing symmetry in the latter material is explained as a simple doping effect. In addition, the requisite formalism for the commonly encountered nonmagnetic impurity and non-local electrodynamic effect are developed. Inspired by the success in explaining classic 115-series heavy fermion superconductors, we expect the present theory will be applied to understand other heavy fermion superconductors such as CeCu2Si2 and more generic multi-band superconductors.
关键词: heavy fermion superconductor ; Kondo lattice system ; superfluid density
作者部门: [Zhong, Yin ; Zhang, Lan ; Luo, Hong-Gang] Lanzhou Univ, Ctr Interdisciplinary Studies, Lanzhou 730000, Peoples R China ; [Zhong, Yin ; Zhang, Lan ; Luo, Hong-Gang] Lanzhou Univ, Key Lab Magnetism & Magnet Mat, MoE, Lanzhou 730000, Peoples R China ; [Luo, Hong-Gang] Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China
通讯作者: Zhong, Y ; Luo, HG (reprint author), Lanzhou Univ, Ctr Interdisciplinary Studies, Lanzhou 730000, Peoples R China. ; Zhong, Y ; Luo, HG (reprint author), Lanzhou Univ, Key Lab Magnetism & Magnet Mat, MoE, Lanzhou 730000, Peoples R China. ; Luo, HG (reprint author), Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China.
学科分类: Physics
文章类型: Article
所属项目编号: NSFC ; PCSIRT [IRT1251] ; Fundamental Research Funds for the Central Universities ; national program for basic research of China
所属项目名称: 国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划) ; 长江学者和创新团队发展计划 ; 中央高校基本科研业务费专项资金
项目资助者: NSFC ; MOST ; MOE ; LZU
语种: 英语
DOI: 10.1007/s11467-016-0625-y
ISSN号: 2095-0462
WOS记录号: WOS:000394185900007
IR记录号: WOS:000394185900007
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/189337
Appears in Collections:物理科学与技术学院_期刊论文

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Recommended Citation:
Zhong, Y,Zhang, L,Shao, C,et al. Superfluid response in heavy fermion superconductors[J]. FRONTIERS OF PHYSICS,2017,12(1-5).
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