Weyl-like points from band inversions of spin-polarised surface states in NbGeSb
| Autor: | Shilong Wu, Keith Murphy, Philip A. E. Murgatroyd, Jonathan Alaria, Matthew S. Dyer, Matthew D. Watson, Philip D. C. King, J. M. Riley, Jun Fujii, François Bertran, P. Le Fèvre, Kaycee Underwood, Chris Hooley, K Volckaert, Ivana Vobornik, Taichi Okuda, Igor Marković, Federico Mazzola, O. J. Clark |
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| Přispěvatelé: | The Leverhulme Trust, EPSRC, The Royal Society, University of St Andrews. Centre for Designer Quantum Materials, University of St Andrews. School of Physics and Astronomy, University of St Andrews. Condensed Matter Physics |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Electronic properties and materials Band gap Science TK General Physics and Astronomy FOS: Physical sciences 02 engineering and technology 01 natural sciences General Biochemistry Genetics and Molecular Biology Article TK Electrical engineering. Electronics Nuclear engineering Settore FIS/03 - Fisica della Materia symbols.namesake Surfaces interfaces and thin films 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics Electronic band structure lcsh:Science QC Surface states Topological matter Condensed Matter - Materials Science Multidisciplinary Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Fermi level Settore FIS/01 - Fisica Sperimentale Materials Science (cond-mat.mtrl-sci) Inversion (meteorology) DAS General Chemistry 021001 nanoscience & nanotechnology Semimetal QC Physics Topological insulator symbols lcsh:Q 0210 nano-technology Mirror symmetry BDC |
| Zdroj: | Nature Communications, Vol 10, Iss 1, Pp 1-8 (2019) Nature Communications Nature communications 10 (2019). doi:10.1038/s41467-019-13464-z info:cnr-pdr/source/autori:Markovic I.; Hooley C.A.; Clark O.J.; Mazzola F.; Watson M.D.; Riley J.M.; Volckaert K.; Underwood K.; Dyer M.S.; Murgatroyd P.A.E.; Murphy K.J.; Fevre P.L.; Bertran F.; Fujii J.; Vobornik I.; Wu S.; Okuda T.; Alaria J.; King P.D.C./titolo:Weyl-like points from band inversions of spin-polarised surface states in NbGeSb/doi:10.1038%2Fs41467-019-13464-z/rivista:Nature communications/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume:10 |
| ISSN: | 2041-1723 |
| Popis: | Band inversions are key to stabilising a variety of novel electronic states in solids, from topological surface states in inverted bulk band gaps of topological insulators to the formation of symmetry-protected three-dimensional Dirac and Weyl points and nodal-line semimetals. Here, we create a band inversion not of bulk states, but rather between manifolds of surface states. We realise this by aliovalent substitution of Nb for Zr and Sb for S in the ZrSiS family of nonsymmorphic semimetals. Using angle-resolved photoemission and density-functional theory, we show how two pairs of surface states, known from ZrSiS, are driven to intersect each other in the vicinity of the Fermi level in NbGeSb, as well as to develop pronounced spin-orbit mediated spin splittings. We demonstrate how mirror symmetry leads to protected crossing points in the resulting spin-orbital entangled surface band structure, thereby stabilising surface state analogues of three-dimensional Weyl points. More generally, our observations suggest new opportunities for engineering topologically and symmetry-protected states via band inversions of surface states. In press at Nature Communications. This is the originally submitted manuscript prior to changes during the review process. Contains 20+6 pages, including Supplementary Information |
| Databáze: | OpenAIRE |
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