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Article: Impurity-induced resonant states in topological nodal-line semimetals

TitleImpurity-induced resonant states in topological nodal-line semimetals
Authors
KeywordsSCATTERING
Issue Date2019
PublisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prb/
Citation
Physical Review B: covering condensed matter and materials physics, 2019, v. 100 n. 20, p. article no. 205119 How to Cite?
AbstractNodal-line semimetals are characterized by a kind of topologically nontrivial bulk-band crossing, giving rise to almost flat surface states. Notably, direct evidence of the surface states is still awaited. Here we theoretically study impurity effects in topological nodal-line semimetals based on the T-matrix method. It is found that some low energy states may be induced near the impurity site for a bulk impurity, while the visible resonant impurity state can only exist for certain impurity strength. For a surface impurity, a robust resonant impurity state exists in a wide parametric range of impurity strength. Such robust resonant state stems from the topologically protected weak dispersive surface states, which can be probed by scanning tunneling microscopy, providing a clear signature of the topological surface states in the nodal-line semimetals.
Persistent Identifierhttp://hdl.handle.net/10722/279997
ISSN
2019 Impact Factor: 3.575
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhou, T-
dc.contributor.authorChen, W-
dc.contributor.authorGao, Y-
dc.contributor.authorWang, ZD-
dc.date.accessioned2019-12-23T08:24:46Z-
dc.date.available2019-12-23T08:24:46Z-
dc.date.issued2019-
dc.identifier.citationPhysical Review B: covering condensed matter and materials physics, 2019, v. 100 n. 20, p. article no. 205119-
dc.identifier.issn2469-9950-
dc.identifier.urihttp://hdl.handle.net/10722/279997-
dc.description.abstractNodal-line semimetals are characterized by a kind of topologically nontrivial bulk-band crossing, giving rise to almost flat surface states. Notably, direct evidence of the surface states is still awaited. Here we theoretically study impurity effects in topological nodal-line semimetals based on the T-matrix method. It is found that some low energy states may be induced near the impurity site for a bulk impurity, while the visible resonant impurity state can only exist for certain impurity strength. For a surface impurity, a robust resonant impurity state exists in a wide parametric range of impurity strength. Such robust resonant state stems from the topologically protected weak dispersive surface states, which can be probed by scanning tunneling microscopy, providing a clear signature of the topological surface states in the nodal-line semimetals.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prb/-
dc.relation.ispartofPhysical Review B: covering condensed matter and materials physics-
dc.rightsPhysical Review B: covering condensed matter and materials physics. Copyright © American Physical Society.-
dc.rightsCopyright [2019] by The American Physical Society. This article is available online at [http://dx.doi.org/10.1103/PhysRevB.100.205119].-
dc.subjectSCATTERING-
dc.titleImpurity-induced resonant states in topological nodal-line semimetals-
dc.typeArticle-
dc.identifier.emailWang, ZD: zwang@hku.hk-
dc.identifier.authorityWang, ZD=rp00802-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevB.100.205119-
dc.identifier.hkuros308725-
dc.identifier.volume100-
dc.identifier.issue20-
dc.identifier.spagearticle no. 205119-
dc.identifier.epagearticle no. 205119-
dc.identifier.isiWOS:000495967500004-
dc.publisher.placeUnited States-

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