In situ electrical and thermal transport properties of FeySe1-xTex films with ionic liquid gating

Xu, Juan1,2; Qin, Mingyang2,3; Lin, Zefeng2; Zhang, Xu2; Zhang, Ruozhou2,4; Xu, Li2,4; Zhang, Liping2; Shi, Qiuyan2,4; Yuan, Jie2,5; Zhu, Beiyi2; Dong, Chao6; Xiong, Rui1; Chen, Qihong2; Li, Yangmu2,4; Shi, Jing1; Jin, Kui2,4,7

2023-03-20

10.1103/PhysRevB.107.094514

PHYSICAL REVIEW B   影响因子和分区

2469-9950

2469-9969

We combine in situ electrical transport and Seebeck coefficient measurements with the ionic liquid gating technique to investigate superconductivity and the normal state of FeySe1-xTex (FST) films. We find that the pristine FST films feature a non-Fermi-liquid temperature dependence of the Seebeck coefficient, i.e., S/T similar to AS ln T, and AS is strongly correlated with the superconducting transition temperature (Tc). Ionic liquid gating significantly raises Tc of FST films, for which the Seebeck coefficient displays a different scaling behavior and retains the logarithmic temperature dependence. Moreover, a quantitative relationship between the slope of T-linear resistivity (A rho) and Tc for gated films is observed, i.e., (A rho)1/2 similar to Tc, consistent with previous reports on cuprates and FeSe. The scaling behaviors of AS and A rho point to a spin-fluctuation-associated transport mechanism in gated FeySe1-xTex superconductors.

SCI ; EI

英语

其他

National Key Basic Research Program of China["2021YFA0718700","2018YFB0704102","2017YFA0303003","2017YFA0302902","2022YFA1603903","2021YFA0718802"] ; National Natural Science Foundation of China["11927808","11834016","118115301","119611410","11961141008","61727805","11961141002","12274439"] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS)["QYZDB-SSW-SLH008","QYZDY-SSW-SLH001"] ; Strategic Priority Research Program (B) of CAS["XDB25000000","XDB33000000"] ; CAS through the Youth Innovation Promotion Association[2022YSBR-048] ; Beijing Natural Science Foundation[Z190008] ; Key-Area Research and Development Program of Guangdong Province[2020B0101340002] ; China Postdoctoral Science Foundation[2022M711497]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000957055800001

AMER PHYSICAL SOC

20231413830833

Copper compounds ; Fermi liquids ; Iron compounds ; Iron-based Superconductors ; Seebeck coefficient ; Selenium compounds ; Spin fluctuations ; Superconducting transition temperature ; Tellurium compounds ; Temperature distribution

Thermoelectric Energy:615.4 ; Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Superconducting Materials:708.3 ; High Temperature Superconducting Materials:708.3.1 ; Chemical Products Generally:804 ; Atomic and Molecular Physics:931.3 ; Electric Variables Measurements:942.2

PHYSICS

Web of Science

1.Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
5.Univ Chinese Acad Sci, Sch Phys Sci, Key Lab Vacuum Phys, Beijing 101408, Peoples R China
6.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
7.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China

Xu, Juan,Qin, Mingyang,Lin, Zefeng,et al. In situ electrical and thermal transport properties of FeySe1-xTex films with ionic liquid gating[J]. PHYSICAL REVIEW B,2023,107(9).

Xu, Juan.,Qin, Mingyang.,Lin, Zefeng.,Zhang, Xu.,Zhang, Ruozhou.,...&Jin, Kui.(2023).In situ electrical and thermal transport properties of FeySe1-xTex films with ionic liquid gating.PHYSICAL REVIEW B,107(9).

Xu, Juan,et al."In situ electrical and thermal transport properties of FeySe1-xTex films with ionic liquid gating".PHYSICAL REVIEW B 107.9(2023).