Superconductivity in the Layered Cage Compound Ba_(3)Rh_(4)Ge_(16)

作     者：Yi Zhao Jun Deng A.Bhattacharyya D.T.Adroja P.K.Biswas Lingling Gao Weizheng Cao Changhua Li Cuiying Pei Tianping Ying Hideo Hosono Yanpeng Qi 赵毅;邓俊;A.Bhattacharyya;D.T.Adroja;P.K.Biswas;高玲玲;曹渭征;李昌华;裴翠颖;应天平;Hideo Hosono;齐彦鹏

作者机构：School of Physical Science and TechnologyShanghaiTech UniversityShanghai 201210China University of Chinese Academy of ScienceBeijing 100049China Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Department of PhysicsRamakrishna Mission Vivekananda Educational and Research InstituteBelur MathHowrah 711202West BengalIndia ISIS FacilityRutherford Appleton LaboratoryChiltonDidcot OxonOX110QXUnited Kingdom Highly Correlated Matter Research GroupPhysics DepartmentUniversity of JohannesburgP.O.Box 524Auckland Park 2006South Africa Materials Research Center for Element StrategyTokyo Institute of Technology4259 NagatsutaMidori-kuYokohama 226-8503Japan 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2021年第38卷第12期

页      面：69-75页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Supported the National Key R&D Program of China(Grant No.2018YFA0704300) the National Natural Science Foundation of China(Grant Nos.U1932217,11974246,and 12004252) the Natural Science Foundation of Shanghai(Grant No.19ZR1477300) the Science and Technology Commission of Shanghai Municipality(Grant No.19JC1413900) the Analytical Instrumentation Center,SPST,Shanghai Tech University(Grant No.SPST-AIC10112914)the SERB,India for Core Research grant support UK-India Newton Funding for funding support the Royal Society of London for Newton Advanced Fellowship funding and International Exchange funding between UK and Japan ISIS Facility for beam time(Grant No.RB1968041) 

主　　题：Cage coupling critical 

摘      要：We report the synthesis and superconducting properties of a layered cage compound Ba_(3)Rh_(4)Ge_(16).Similar to Ba_(3)Ir_(4)Ge_(16),the compound is composed of 2 D networks of cage units,formed by noncubic Rh-Ge building blocks,in marked contrast to the reported rattling *** electrical resistivity,magnetization,specific heat capacity,andμSR measurements unveiled moderately coupled s-wave superconductivity with a critical temperature T_(c)=7.0 K,the upper critical field μ_(0)H_(c2)(0)~2.5 T,the electron-phonon coupling strength λ_(e-ph)~0.80,and the Ginzburg-Landau parameterκ~*** mass reduction with the substitution of Ir by Rh is believed to be responsible for the enhancement of T_(c) and coupling between the cage and guest *** results highlight the importance of atomic weight of framework in cage compounds in controlling the λ_(e-ph) strength and T_(c).