中国物理B ›› 2019, Vol. 28 ›› Issue (1): 17106-017106.doi: 10.1088/1674-1056/28/1/017106

所属专题: TOPICAL REVIEW — Fundamental research under high magnetic fields

• TOPICAL REVIEW—Fundamental research under high magnetic fields • 上一篇    下一篇

Heavy fermions in high magnetic fields

M Smidman, B Shen(沈斌), C Y Guo(郭春煜), L Jiao(焦琳), X Lu(路欣), H Q Yuan(袁辉球)   

  1. 1 Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou 310058, China;
    2 Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
  • 收稿日期:2018-11-06 修回日期:2018-12-27 出版日期:2019-01-05 发布日期:2019-01-05
  • 通讯作者: H Q Yuan E-mail:hqyuan@zju.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. U1632275), the National Key R&D Program of China (Grant Nos. 2017YFA0303100 and 2016YFA0300202), and the Science Challenge Project of China (Grant No. TZ2016004).

Heavy fermions in high magnetic fields

M Smidman1, B Shen(沈斌)1, C Y Guo(郭春煜)1, L Jiao(焦琳)1, X Lu(路欣)1,2, H Q Yuan(袁辉球)1,2   

  1. 1 Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou 310058, China;
    2 Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
  • Received:2018-11-06 Revised:2018-12-27 Online:2019-01-05 Published:2019-01-05
  • Contact: H Q Yuan E-mail:hqyuan@zju.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. U1632275), the National Key R&D Program of China (Grant Nos. 2017YFA0303100 and 2016YFA0300202), and the Science Challenge Project of China (Grant No. TZ2016004).

摘要: Heavy fermion materials are prototypical strongly correlated electron systems, where the strong electron–electron interactions lead to a wide range of novel phenomena and emergent phases of matter. Due to the low energy scales, the relative strengths of the Ruderman–Kittel–Kasuya–Yosida (RKKY) and Kondo interactions can often be readily tuned by non-thermal control parameters such as pressure, doping, or applied magnetic fields, which can give rise to quantum criticality and unconventional superconductivity. Here we provide a brief overview of research into heavy fermion materials in high magnetic fields, focussing on three main areas. Firstly we review the use of magnetic fields as a tuning parameter, and in particular the ability to realize different varieties of quantum critical behaviors. We then discuss the properties of heavy fermion superconductors in magnetic fields, where experiments in applied fields can reveal the nature of the order parameter, and induce new novel phenomena. Finally we report recent studies of topological Kondo systems, including topological Kondo insulators and Kondo–Weyl semimetals. Here experiments in magnetic fields can be used to probe the topologically non-trivial Fermi surface, as well as related field-induced phenomena such as the chiral anomaly and topological Hall effect.

关键词: heavy fermions, high magnetic fields, quantum phase transitions, heavy fermion superconductivity, topological Kondo systems

Abstract: Heavy fermion materials are prototypical strongly correlated electron systems, where the strong electron–electron interactions lead to a wide range of novel phenomena and emergent phases of matter. Due to the low energy scales, the relative strengths of the Ruderman–Kittel–Kasuya–Yosida (RKKY) and Kondo interactions can often be readily tuned by non-thermal control parameters such as pressure, doping, or applied magnetic fields, which can give rise to quantum criticality and unconventional superconductivity. Here we provide a brief overview of research into heavy fermion materials in high magnetic fields, focussing on three main areas. Firstly we review the use of magnetic fields as a tuning parameter, and in particular the ability to realize different varieties of quantum critical behaviors. We then discuss the properties of heavy fermion superconductors in magnetic fields, where experiments in applied fields can reveal the nature of the order parameter, and induce new novel phenomena. Finally we report recent studies of topological Kondo systems, including topological Kondo insulators and Kondo–Weyl semimetals. Here experiments in magnetic fields can be used to probe the topologically non-trivial Fermi surface, as well as related field-induced phenomena such as the chiral anomaly and topological Hall effect.

Key words: heavy fermions, high magnetic fields, quantum phase transitions, heavy fermion superconductivity, topological Kondo systems

中图分类号:  (Strongly correlated electron systems; heavy fermions)

  • 71.27.+a
74.70.-b (Superconducting materials other than cuprates) 74.70.Tx (Heavy-fermion superconductors)