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  Magnetic field–induced pair density wave state in the cuprate vortex halo

Edkins, S. D., Kostin, A., Fujita, K., Mackenzie, A. P., Eisaki, H., Uchida, S., et al. (2019). Magnetic field–induced pair density wave state in the cuprate vortex halo. Science, 364(6444), 976-980. doi:10.1126/science.aat1773.

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Edkins, S. D.1, Autor
Kostin, A.1, Autor
Fujita, K.1, Autor
Mackenzie, A. P.2, Autor           
Eisaki, H.1, Autor
Uchida, S.1, Autor
Sachdev, Subir1, Autor
Lawler, Michael J.1, Autor
Kim, E.-A.1, Autor
Davis, J. C. Séamus1, Autor
Hamidian, M. H.1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2Andrew Mackenzie, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863463              

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 Zusammenfassung: Magnetic fields can cause the formation of vortices in a superconductor. In cuprate superconductors, the vortex cores are surrounded by “halos,” where the density of electronic states exhibits a checkerboard pattern. Edkins et al. used scanning tunneling spectroscopy to take a closer look into the halos. The results revealed that the patterns correspond to an exotic state called the pair density wave, in which the density of finite momentum Cooper pairs is spatially modulated.Science, this issue p. 976High magnetic fields suppress cuprate superconductivity to reveal an unusual density wave (DW) state coexisting with unexplained quantum oscillations. Although routinely labeled a charge density wave (CDW), this DW state could actually be an electron-pair density wave (PDW). To search for evidence of a field-induced PDW, we visualized modulations in the density of electronic states N(r) within the halo surrounding Bi2Sr2CaCu2O8 vortex cores. We detected numerous phenomena predicted for a field-induced PDW, including two sets of particle-hole symmetric N(r) modulations with wave vectors QP and 2QP, with the latter decaying twice as rapidly from the core as the former. These data imply that the primary field-induced state in underdoped superconducting cuprates is a PDW, with approximately eight CuO2 unit-cell periodicity and coexisting with its secondary CDWs.

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Sprache(n): eng - English
 Datum: 2019-06-072019-06-07
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: DOI: 10.1126/science.aat1773
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Titel: Science
  Andere : Science
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, D.C. : American Association for the Advancement of Science
Seiten: - Band / Heft: 364 (6444) Artikelnummer: - Start- / Endseite: 976 - 980 Identifikator: ISSN: 0036-8075
CoNE: https://pure.mpg.de/cone/journals/resource/991042748276600_1