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Orthorhombic TaAs: A New Topological Phase of the Archetypical Weyl Semimetal

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Titel: Orthorhombic TaAs: A New Topological Phase of the Archetypical Weyl Semimetal
Autoren: Z. Ogorzałek, C.-C. Lee, J. Z. Domagala, W. Zajkowska-Pietrzak, S. Kret, R. Bożek, W. Pacuski, I. Lutsyk, W. Ryś, P. J. Kowalczyk, M. Tokarczyk, M. Polakowski, D. Wasik, J. Sadowski, B.-H. Huang, H. Lin, M. Gryglas-Borysiewicz
Publikationsjahr: 2025
Schlagwörter: Biochemistry, Genetics, Cancer, Computational Biology, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, weyl semimetal layers, ray diffraction pattern, molecular beam epitaxy, archetypical weyl semimetal, 20 weyl nodes, topologically nontrivial phase, topological weyl semimetal, new way toward, new atom arrangement, known tetragonal phase, new topological phase, new orthorhombic phase, tetragonal phase, new phase, topological origin, orthorhombic taas, ∼ 0, weak antilocalization, valence band, taas identified, strain adjustment, slightly higher, low temperatures, formation energy
Beschreibung: We report on a new, topologically nontrivial phase of TaAs identified in thin TaAs layers grown by molecular beam epitaxy. Structural investigations clearly show a new atom arrangement, confirmed by the presence of 104 reflections in the X-ray diffraction pattern, forbidden for the well-known tetragonal phase. Density functional theory confirms the presence of a new orthorhombic phase and reveals that its formation energy is slightly higher (by ∼0.6 meV per atom) than for the tetragonal phase. The orthorhombic TaAs is a topological Weyl semimetal with 20 Weyl nodes. Weak antilocalization of a topological origin is observed at low temperatures. With the Fermi energy relatively deep in the valence band, no other signatures of the chiral properties are resolved. The demonstration of the new phase, combined with the molecular beam epitaxy capabilities of doping and strain adjustment, opens a new way toward the fine-tuning of Weyl semimetal layers and heterostructures.
Publikationsart: article in journal/newspaper
Sprache: unknown
Relation: https://figshare.com/articles/journal_contribution/Orthorhombic_TaAs_A_New_Topological_Phase_of_the_Archetypical_Weyl_Semimetal/29980003
DOI: 10.1021/acsami.5c04474.s001
Verfügbarkeit: https://doi.org/10.1021/acsami.5c04474.s001
https://figshare.com/articles/journal_contribution/Orthorhombic_TaAs_A_New_Topological_Phase_of_the_Archetypical_Weyl_Semimetal/29980003
Rights: CC BY-NC 4.0
Dokumentencode: edsbas.D8325D2F
Datenbank: BASE
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  – Url: https://doi.org/10.1021/acsami.5c04474.s001#
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  Data: Orthorhombic TaAs: A New Topological Phase of the Archetypical Weyl Semimetal
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  Data: <searchLink fieldCode="AR" term="%22Z%2E+Ogorzałek%22">Z. Ogorzałek</searchLink><br /><searchLink fieldCode="AR" term="%22C%2E-C%2E+Lee%22">C.-C. Lee</searchLink><br /><searchLink fieldCode="AR" term="%22J%2E+Z%2E+Domagala%22">J. Z. Domagala</searchLink><br /><searchLink fieldCode="AR" term="%22W%2E+Zajkowska-Pietrzak%22">W. Zajkowska-Pietrzak</searchLink><br /><searchLink fieldCode="AR" term="%22S%2E+Kret%22">S. Kret</searchLink><br /><searchLink fieldCode="AR" term="%22R%2E+Bożek%22">R. Bożek</searchLink><br /><searchLink fieldCode="AR" term="%22W%2E+Pacuski%22">W. Pacuski</searchLink><br /><searchLink fieldCode="AR" term="%22I%2E+Lutsyk%22">I. Lutsyk</searchLink><br /><searchLink fieldCode="AR" term="%22W%2E+Ryś%22">W. Ryś</searchLink><br /><searchLink fieldCode="AR" term="%22P%2E+J%2E+Kowalczyk%22">P. J. Kowalczyk</searchLink><br /><searchLink fieldCode="AR" term="%22M%2E+Tokarczyk%22">M. Tokarczyk</searchLink><br /><searchLink fieldCode="AR" term="%22M%2E+Polakowski%22">M. Polakowski</searchLink><br /><searchLink fieldCode="AR" term="%22D%2E+Wasik%22">D. Wasik</searchLink><br /><searchLink fieldCode="AR" term="%22J%2E+Sadowski%22">J. Sadowski</searchLink><br /><searchLink fieldCode="AR" term="%22B%2E-H%2E+Huang%22">B.-H. Huang</searchLink><br /><searchLink fieldCode="AR" term="%22H%2E+Lin%22">H. Lin</searchLink><br /><searchLink fieldCode="AR" term="%22M%2E+Gryglas-Borysiewicz%22">M. Gryglas-Borysiewicz</searchLink>
– Name: DatePubCY
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  Data: 2025
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  Data: <searchLink fieldCode="DE" term="%22Biochemistry%22">Biochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Genetics%22">Genetics</searchLink><br /><searchLink fieldCode="DE" term="%22Cancer%22">Cancer</searchLink><br /><searchLink fieldCode="DE" term="%22Computational+Biology%22">Computational Biology</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+Sciences+not+elsewhere+classified%22">Chemical Sciences not elsewhere classified</searchLink><br /><searchLink fieldCode="DE" term="%22Physical+Sciences+not+elsewhere+classified%22">Physical Sciences not elsewhere classified</searchLink><br /><searchLink fieldCode="DE" term="%22weyl+semimetal+layers%22">weyl semimetal layers</searchLink><br /><searchLink fieldCode="DE" term="%22ray+diffraction+pattern%22">ray diffraction pattern</searchLink><br /><searchLink fieldCode="DE" term="%22molecular+beam+epitaxy%22">molecular beam epitaxy</searchLink><br /><searchLink fieldCode="DE" term="%22archetypical+weyl+semimetal%22">archetypical weyl semimetal</searchLink><br /><searchLink fieldCode="DE" term="%2220+weyl+nodes%22">20 weyl nodes</searchLink><br /><searchLink fieldCode="DE" term="%22topologically+nontrivial+phase%22">topologically nontrivial phase</searchLink><br /><searchLink fieldCode="DE" term="%22topological+weyl+semimetal%22">topological weyl semimetal</searchLink><br /><searchLink fieldCode="DE" term="%22new+way+toward%22">new way toward</searchLink><br /><searchLink fieldCode="DE" term="%22new+atom+arrangement%22">new atom arrangement</searchLink><br /><searchLink fieldCode="DE" term="%22known+tetragonal+phase%22">known tetragonal phase</searchLink><br /><searchLink fieldCode="DE" term="%22new+topological+phase%22">new topological phase</searchLink><br /><searchLink fieldCode="DE" term="%22new+orthorhombic+phase%22">new orthorhombic phase</searchLink><br /><searchLink fieldCode="DE" term="%22tetragonal+phase%22">tetragonal phase</searchLink><br /><searchLink fieldCode="DE" term="%22new+phase%22">new phase</searchLink><br /><searchLink fieldCode="DE" term="%22topological+origin%22">topological origin</searchLink><br /><searchLink fieldCode="DE" term="%22orthorhombic+taas%22">orthorhombic taas</searchLink><br /><searchLink fieldCode="DE" term="%22∼+0%22">∼ 0</searchLink><br /><searchLink fieldCode="DE" term="%22weak+antilocalization%22">weak antilocalization</searchLink><br /><searchLink fieldCode="DE" term="%22valence+band%22">valence band</searchLink><br /><searchLink fieldCode="DE" term="%22taas+identified%22">taas identified</searchLink><br /><searchLink fieldCode="DE" term="%22strain+adjustment%22">strain adjustment</searchLink><br /><searchLink fieldCode="DE" term="%22slightly+higher%22">slightly higher</searchLink><br /><searchLink fieldCode="DE" term="%22low+temperatures%22">low temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22formation+energy%22">formation energy</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: We report on a new, topologically nontrivial phase of TaAs identified in thin TaAs layers grown by molecular beam epitaxy. Structural investigations clearly show a new atom arrangement, confirmed by the presence of 104 reflections in the X-ray diffraction pattern, forbidden for the well-known tetragonal phase. Density functional theory confirms the presence of a new orthorhombic phase and reveals that its formation energy is slightly higher (by ∼0.6 meV per atom) than for the tetragonal phase. The orthorhombic TaAs is a topological Weyl semimetal with 20 Weyl nodes. Weak antilocalization of a topological origin is observed at low temperatures. With the Fermi energy relatively deep in the valence band, no other signatures of the chiral properties are resolved. The demonstration of the new phase, combined with the molecular beam epitaxy capabilities of doping and strain adjustment, opens a new way toward the fine-tuning of Weyl semimetal layers and heterostructures.
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– Name: NoteTitleSource
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  Data: https://figshare.com/articles/journal_contribution/Orthorhombic_TaAs_A_New_Topological_Phase_of_the_Archetypical_Weyl_Semimetal/29980003
– Name: DOI
  Label: DOI
  Group: ID
  Data: 10.1021/acsami.5c04474.s001
– Name: URL
  Label: Availability
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  Data: https://doi.org/10.1021/acsami.5c04474.s001<br />https://figshare.com/articles/journal_contribution/Orthorhombic_TaAs_A_New_Topological_Phase_of_the_Archetypical_Weyl_Semimetal/29980003
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        Value: 10.1021/acsami.5c04474.s001
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      – SubjectFull: Biochemistry
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      – SubjectFull: Genetics
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      – SubjectFull: Physical Sciences not elsewhere classified
        Type: general
      – SubjectFull: weyl semimetal layers
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      – SubjectFull: ray diffraction pattern
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      – TitleFull: Orthorhombic TaAs: A New Topological Phase of the Archetypical Weyl Semimetal
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