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  Microscopic theory of the nematic phase in Sr3Ru2O7

Raghu, S., Paramekanti, A., Kim, E. A., Borzi, R. A., Grigera, S. A., Mackenzie, A. P., et al. (2009). Microscopic theory of the nematic phase in Sr3Ru2O7. Physical Review B, 79(21): 214402, pp. 1-10. doi:10.1103/PhysRevB.79.214402.

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 Urheber:
Raghu, S.1, Autor
Paramekanti, A.1, Autor
Kim, E. A.1, Autor
Borzi, R. A.1, Autor
Grigera, S. A.1, Autor
Mackenzie, A. P.2, Autor           
Kivelson, S. A.1, Autor
Affiliations:
1external, ou_persistent22              
2External Organizations, ou_persistent22              

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 Zusammenfassung: In an externally applied magnetic field, ultrapure crystals of the bilayer compound Sr3Ru2O7 undergo a metamagnetic transition below a critical temperature, T-*, which varies as a function of the angle between the magnetic field H and the Ru-O planes. Moreover, T-* approaches zero when H is perpendicular to the planes. This putative "metamagnetic quantum critical point," however, is pre-empted by a nematic fluid phase with order one resistive anisotropy in the ab plane. In a "realistic" bilayer model with moderate strength local Coulomb interactions, the existence of a sharp divergence of the electronic density of states near a van Hove singularity of the quasi-one-dimensional bands, and the presence of spin-orbit coupling results in a mean-field phase diagram which accounts for many of these experimentally observed phenomena. Although the spin-orbit coupling is not overly strong, it destroys the otherwise near-perfect Fermi-surface nesting and hence suppresses spin-density-wave ordering.

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 Datum: 2009-06-04
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: 000267699200063
DOI: 10.1103/PhysRevB.79.214402
 Art des Abschluß: -

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Titel: Physical Review B
  Andere : Phys. Rev. B
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Woodbury, NY : American Physical Society
Seiten: - Band / Heft: 79 (21) Artikelnummer: 214402 Start- / Endseite: 1 - 10 Identifikator: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008