详细信息
文献类型:期刊文献
中文题名:Multi-loop node line states in ternary MgSrSi-type crystals
作者:Jinling Lian[1];Lixian Yu[1];Qi-Feng Liang[1];Jian Zhou[2];Rui Yu[3];Hongming Weng[4,5]
机构:[1]Department of Physics,Shaoxing University,312000 Shaoxing,China;[2]National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering,Nanjing University,210093 Nanjing,China;[3]School of Physics and Technology,Wuhan University,430072 Wuhan,China;[4]Beijing National Laboratory for Condensed Matter Physics,and Institute of Physics,Chinese Academy of Sciences,100190 Beijing,China;[5]Songshan Lake Materials Laboratory,Guangdong 523808,China
年份:2019
期号:1
起止页码:1056
中文期刊名:计算材料学(英文)
外文期刊名:npj Computational Materials
收录:CSCD2019_2020、CSCD
基金:The work is supported by National Natural Science Foundation of China(NSFC)(Grants No.11574215,No.11575116,No.11274359,and No.11422428);H.M.W is also supported by the National 973 program of China(Grants No.2018YFA0305700 and No.2013CB921700);the“Strategic Priority Research Program(B)”of the Chinese Academy of Sciences(Grant No.XDB07020100).
语种:英文
中文关键词:structure;materials;topological;
中文摘要:Node line band-touchings protected by mirror symmetry(named as m-NLs),the product of inversion and time reversal symmetry S=PT(named as s-NLs),or nonsymmorphic symmetry are nontrivial topological objects of topological semimetals in the Brillouin Zone.In this work,we screened a family of MgSrSi-type crystals using first principles calculations,and discovered that more than 70 members are node-line semimetals.A new type of multi-loop structure was found in AsRhTi that a s-NL touches robustly with a m-NL at some“nexus point”,and in the meanwhile a second m-NL crosses with the s-NL to form a Hopf-link.Unlike the previously proposed Hopf-link formed by two s-NLs or two m-NLs,a Hopf-link formed by a s-NL and a m-NL requires a minimal three-band model to characterize its essential electronic structure.The associated topological surface states on different surfaces of AsRhTi crystal were also obtained.Even more complicated and exotic multi-loop structure of NLs were predicted in AsFeNb and PNiNb.Our work may shed light on search for exotic multi-loop node-line semimetals in real materials.
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