典型文献
Superconductivity with a Violation of Pauli Limit and Evidences for Multigap in η-Carbide Type Ti4Ir2O
文献摘要：
We report the synthesis,crystal structure,and superconductivity of Ti4Ir2O.The title compound crystallizes in an η-carbide type structure of the space group Fd(3)m (No.227),with lattice parameters a =b =c =11.6194(1)(A).The superconducting temperature Tc is found to be 5.1-5.7K.Most surprisingly,Ti4Ir2O hosts an upper critical field of 16.45 T,which is far beyond the Pauli paramagnetic limit.Strong coupled superconductivity with evidences for multigap is revealed by the measurements of heat capacity and upper critical field.First-principles calculations suggest that the density of states near the Fermi level originates from the hybridization of Ti-3d and Ir-5d orbitals,and the effect of spin-orbit coupling on the Fermi surfaces is prominent.Large values of the Wilson ratio (RW ～ 3.9),the Kadowaki-Woods ratio[A/γ2 ～ 9.0 × 10-6 μΩ·cm/(mJ·mol-1·K-1)2],and the Sommerfeld coefficient (γ =33.74mJ·mol-1·K-2) all suggest strong electron correlations (similar to heavy fermion systems) in Ti4Ir2O.The violation of Pauli limit is possibly due to a combination of strong-coupled superconductivity and large spin-orbit scattering.With these intriguing behaviors,Ti4Ir2O serves as a candidate for unconventional superconductor.
文献关键词：
中图分类号：
作者姓名：
Bin-Bin Ruan;Meng-Hu Zhou;Qing-Song Yang;Ya-Dong Gu;Ming-Wei Ma;Gen-Fu Chen;Zhi-An Ren
作者机构：
Songshan Lake Materials Laboratory,Dongguan 523808,China;Institute of Physics and Beijing National Laboratory for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China
文献出处：
引用格式：
[1]Bin-Bin Ruan;Meng-Hu Zhou;Qing-Song Yang;Ya-Dong Gu;Ming-Wei Ma;Gen-Fu Chen;Zhi-An Ren-.Superconductivity with a Violation of Pauli Limit and Evidences for Multigap in η-Carbide Type Ti4Ir2O)[J].中国物理快报（英文版）,2022(02):81-92
A类：
Violation,Multigap,Ti4Ir2O,multigap,Kadowaki,74mJ
B类：
Superconductivity,Pauli,Limit,Evidences,Carbide,Type,We,report,synthesis,structure,superconductivity,title,compound,crystallizes,carbide,type,space,group,Fd,No,lattice,parameters,superconducting,temperature,Tc,found,7K,Most,surprisingly,hosts,upper,critical,field,which,far,beyond,paramagnetic,limit,Strong,coupled,evidences,revealed,by,measurements,heat,capacity,First,principles,calculations,suggest,that,density,states,near,Fermi,level,originates,from,hybridization,3d,5d,orbitals,effect,spin,coupling,surfaces,prominent,Large,values,Wilson,ratio,RW,Woods,Sommerfeld,coefficient,strong,electron,correlations,similar,heavy,fermion,systems,violation,possibly,due,combination,large,scattering,With,these,intriguing,behaviors,serves,candidate,unconventional,superconductor
AB值：
0.591653
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