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Article: Quantized Circulation of Anomalous Shift in Interface Reflection

TitleQuantized Circulation of Anomalous Shift in Interface Reflection
Authors
Issue Date2020
Citation
Physical Review Letters, 2020, v. 125, n. 7, article no. 076801 How to Cite?
AbstractA particle beam may undergo an anomalous spatial shift when it is reflected at an interface. The shift forms a vector field defined in the two-dimensional interface momentum space. We show that, although the shift vector at individual momentum is typically sensitive to the system details, its integral along a close loop, i.e., its circulation, could yield a robust quantized number under certain conditions of interest. Particularly, this is the case when the beam is incident from a trivial medium, then the quantized circulation of anomalous shift (CAS) directly manifests the topological character of the other medium. We demonstrate that the topological charge of a Weyl medium as well as the unconventional pair potentials of a superconductor can be captured and distinguished by CAS. Our work unveils a hidden quantized feature in a ubiquitous physical process, which may also offer a new approach for probing topological media.
Persistent Identifierhttp://hdl.handle.net/10722/311490
ISSN
2023 Impact Factor: 8.1
2023 SCImago Journal Rankings: 3.040
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLiu, Ying-
dc.contributor.authorYu, Zhi Ming-
dc.contributor.authorXiao, Cong-
dc.contributor.authorYang, Shengyuan A.-
dc.date.accessioned2022-03-22T11:54:04Z-
dc.date.available2022-03-22T11:54:04Z-
dc.date.issued2020-
dc.identifier.citationPhysical Review Letters, 2020, v. 125, n. 7, article no. 076801-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/311490-
dc.description.abstractA particle beam may undergo an anomalous spatial shift when it is reflected at an interface. The shift forms a vector field defined in the two-dimensional interface momentum space. We show that, although the shift vector at individual momentum is typically sensitive to the system details, its integral along a close loop, i.e., its circulation, could yield a robust quantized number under certain conditions of interest. Particularly, this is the case when the beam is incident from a trivial medium, then the quantized circulation of anomalous shift (CAS) directly manifests the topological character of the other medium. We demonstrate that the topological charge of a Weyl medium as well as the unconventional pair potentials of a superconductor can be captured and distinguished by CAS. Our work unveils a hidden quantized feature in a ubiquitous physical process, which may also offer a new approach for probing topological media.-
dc.languageeng-
dc.relation.ispartofPhysical Review Letters-
dc.titleQuantized Circulation of Anomalous Shift in Interface Reflection-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1103/PhysRevLett.125.076801-
dc.identifier.pmid32857537-
dc.identifier.scopuseid_2-s2.0-85090169719-
dc.identifier.volume125-
dc.identifier.issue7-
dc.identifier.spagearticle no. 076801-
dc.identifier.epagearticle no. 076801-
dc.identifier.eissn1079-7114-
dc.identifier.isiWOS:000558086800009-

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