15 Papers
20 Citations
Yi Liu is an academic researcher from University of Science and Technology of China. The author has contributed to research in topics: Quasiparticle & Antiferromagnetism. The author has an hindex of 5, co-authored 15 publications.
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Papers
Emergence of Kondo lattice behavior in a van der Waals itinerant ferromagnet, Fe3GeTe2
Yun Zhang,Haiyan Lu,Xie-Gang Zhu,Shiyong Tan,Wei Feng,Qin Liu,Wen Zhang,Qiuyun Chen,Yi Liu,Xue-Bing Luo,Donghua Xie,Lizhu Luo,Zhengjun Zhang,Xinchun Lai +13 more
TL;DR: This work expands the limit of ferromagnetic HF materials from f- to d-electron systems and illustrates the positive correlation between ferromagnetism and HF state in the 3d-electrons material, which is quite different from the f-Electron systems.
232
Tunable Topological Surface States in Rare Earth Mono-Bismuthides with Partially Filled f Shell.
Peng Li,Zhongzheng Wu,Fan Wu,Chao Cao,Chunyu Guo,Yi Wu,Yi Liu,Zhe Sun,Cheng-Maw Cheng,Deng-Sung Lin,Frank Steglich,Huiqiu Yuan,Tai-Chang Chiang,Yang Liu +13 more
TL;DR: In this paper, the bulk band structure, existence and evolution of topological surface states in rare earth mono-bismuthides were determined using synchrotron-based photoemission spectroscopy.
25
Strong coupling between localized 5f moments and itinerant quasiparticles in the ferromagnetic superconductor UGe 2
Abstract: The heavy fermion physics arises from the complex interplay of nearly localized 4f/5f electrons and itinerant band-like ones, yielding heavy quasiparticles with an effective mass about 100 times (or more) of the bare electrons. Recently, experimental and theoretical investigations point out a localized and delocalized dual nature in actinide compounds, where itinerant quasiparticles account for the unconventional superconductivity in the vicinity of a magnetic instability. Here we report the strong coupling between localized 5f moments and itinerant quasiparticles in the ferromagnetic superconductor UGe2. The coupling is nearly antiferromagnetic. As embedded in the ferromagnetic matrix of localized 5f moments below T C ≈ 52 K , this coupling leads to short-range dynamic correlations of heavy quasiparticles, characterized by fluctuations of magnetic clusters. Those cluster-like spins of itinerant quasiparticles show a broad hump of magnetization at T X ≈ 28 K , which is typical for the spin-glass freezing. Thus, our results present the direct observation of itinerant quasiparticles coexisting with localized 5f moments by conventional magnetic measurements, providing a new route into the coexistence between ferromagnetism and superconductivity in heavy fermion systems.
7
•Journal Article
Large Fermi surface expansion through anisotropic mixing of conduction and f electrons in the semimetallic Kondo lattice CeBi
Peng Li,Zhongzheng Wu,Fan Wu,Chunyu Guo,Yi Liu,Haijiang Liu,Zhe Sun,Ming Shi,Fanny Rodolakis,Jessica L. McChesney,Chao Cao,Huiqiu Yuan,Frank Steglich,Yang Liu +13 more
TL;DR: Using angle-resolved photoemission spectroscopy (ARPES) and resonant ARPES, this article reported evidence of strong anisotropic conduction-$f$ electron mixing in CeBi by observing a largely expanded Ce $5d$ pocket at low temperature, with no change in the Bi $6p$ bands.
5
Physical properties and field-induced metamagnetic transitions in UAu 0.8 Sb 2
Wen Zhang,Chunyu Guo,Donghua Xie,Michael Smidman,Bingfeng Hu,Yuanhua Xia,Yi Liu,Shiyong Tan,Wei Feng,Xie-Gang Zhu,Yun Zhang,Qunqing Hao,Lizhu Luo,Huiqiu Yuan,Xinchun Lai +14 more
TL;DR: A comprehensive study of its physical properties by measuring the magnetic susceptibility, electrical resistivity and specific heat is presented and evidence for at least three magnetic phases is observed in the field-temperature phase diagram of UAu0.8Sb2.