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  Spin-valley locking in the normal state of a transition-metal dichalcogenide superconductor

Bawden, L., Cooil, S. P., Mazzola, F., Riley, J. M., Collins-McIntyre, L. J., Sunko, V., et al. (2016). Spin-valley locking in the normal state of a transition-metal dichalcogenide superconductor. Nature Communications, 7: 11711, pp. 1-6. doi:10.1038/ncomms11711.

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Bawden, L.1, Autor
Cooil, S. P.1, Autor
Mazzola, F.1, Autor
Riley, J. M.1, Autor
Collins-McIntyre, L. J.1, Autor
Sunko, V.2, Autor           
Hunvik, K. W. B.1, Autor
Leandersson, M.1, Autor
Polley, C. M.1, Autor
Balasubramanian, T.1, Autor
Kim, T. K.1, Autor
Hoesch, M.1, Autor
Wells, J. W.1, Autor
Balakrishnan, G.1, Autor
Bahramy, M. S.1, Autor
King, P. D. C.1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 Zusammenfassung: Metallic transition-metal dichalcogenides (TMDCs) are benchmark systems for studying and controlling intertwined electronic orders in solids, with superconductivity developing from a charge-density wave state. The interplay between such phases is thought to play a critical role in the unconventional superconductivity of cuprates, Fe-based and heavy-fermion systems, yet even for the more moderately-correlated TMDCs, their nature and origins have proved controversial. Here, we study a prototypical example, 2H-NbSe2, by spin-and angle-resolved photoemission and first-principles theory. We find that the normal state, from which its hallmark collective phases emerge, is characterized by quasiparticles whose spin is locked to their valley pseudospin. This results from a combination of strong spin-orbit interactions and local inversion symmetry breaking, while interlayer coupling further drives a rich three-dimensional momentum dependence of the underlying Fermi-surface spin texture. These findings necessitate a re-investigation of the nature of charge order and superconducting pairing in NbSe2 and related TMDCs.

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Sprache(n): eng - English
 Datum: 2016-05-232016-05-23
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: 000376205300001
DOI: 10.1038/ncomms11711
 Art des Abschluß: -

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Titel: Nature Communications
  Kurztitel : Nat. Commun.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: London : Nature Publishing Group
Seiten: - Band / Heft: 7 Artikelnummer: 11711 Start- / Endseite: 1 - 6 Identifikator: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723