First-Principles Study of Hole-Doped Superconductors RNiO_(2)(R=Nd,La,and Pr)

作     者：Juan-Juan Hao Pei-Han Sun Ming Zhang Xian-Xin Wu Kai Liu Fan Yang 蒿娟娟;孙培函;张铭;吴贤新;刘凯;杨帆

作者机构：School of PhysicsBeijing Institute of TechnologyBeijing 100081China Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano DevicesRenmin University of ChinaBeijing 100872China CAS Key Laboratory of Theoretical PhysicsInstitute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Max-Planck-Institut f¨ur Festk¨orperforschungHeisenbergstrasse 1D-70569 StuttgartGermany 

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

年 卷 期：2022年第39卷第6期

页      面：29-33页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 12074031, 11674025, and 12174443) the National Key R&D Program of China (Grant No. 2017YFA0302903) the Beijing Natural Science Foundation (Grant No. Z200005) 

主　　题：superconductivity phonon coupling 

摘      要：Recent experiments have found that in contrast to the nonsuperconducting bulk RNiO_(2)(R=Nd,La,and Pr),the strontium-doped R_(1−x)Sr_(x)NiO_(2)thin films show superconductivity with the critical temperature T_(c)of 9–15K at x=0.2,whose origin of superconductivity deserves further *** on first-principles calculations,we study the electronic structure,lattice dynamics,and electron–phonon coupling(EPC)of the undoped and doped RNiO_(2)(R=Nd,La,and Pr)at the experimental doping *** results show that the EPC-derived T_(c)’s are all about 0K in the undoped and doped RNiO_(2).The electron–phonon coupling strength is too small to account for the observed *** hence propose that the electron–phonon interaction can not be the exclusive origin of the superconductivity in RNiO_(2)(R=Nd,La,and Pr).