Planckian dissipation and non-Ginzburg-Landau type upper critical field in Bi2201  

作　　者：Qihao Zang Zhengyan Zhu Zuyu Xu Shichao Qi Haoran Ji Yiwen Li Jian Wang Huiqian Luo Hua-Bing Wang Hai-Hu Wen 

机构地区：[1]National Laboratory of Solid State Microstructures and Department of Physics,Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China [2]Research Institute of Superconductor Electronics,Nanjing University,Nanjing 210093,China [3]International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China [4]Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [5]Purple Mountain Laboratories,Nanjing 211111,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2023年第3期147-155,共9页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11927809,NSFC-DFG12061131001,61727805;11888101);the National Key R&D Program of China(Grant Nos.2016YFA0300401,2021YFA0718802,and 2018YFA0305604);the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB25000000);the Beijing Natural Science Foundation(Grant No.Z180010)。

摘　　要：Resistivity and Hall effect measurements have been carried out on a micro-fabricated bridge of Bi2201 single crystal at low temperatures down to 0.4 K under high magnetic fields.When superconductivity is crashed by a high magnetic field,the recovered "normal state" resistivity still shows a linear temperature dependence in the low temperature region.Combining with the effective mass and the charge carrier density,we get a linear scattering rate 1/τ=αkBT/h with 0.77 <α <1.16,which gives a strong evidence of the Planckian dissipation.Furthermore,our results reveal a new type of temperature dependence of the upper critical field,H_(c2)(T)=H*■,which is totally different from the expectation of the Ginzburg-Landau theory,and suggests the existence of uncondensed Cooper pairs above H_(c2)(T) line.

关 键 词：CUPRATES scattering rate Planckian dessipation anomalous upper critical field 

分 类 号：O17[理学—数学]