Two-Dimensional Superconducting Fluctuations Associated with Charge-Density-Wave Stripes in La1.87Sr0.13Cu0.99Fe0.01 O4

H. Huang, S. J. Lee, Y. Ikeda, T. Taniguchi, M. Takahama, C. C. Kao, M. Fujita, J. S. Lee

Research output: Contribution to journalArticlepeer-review

Abstract

The presence of a small concentration of in-plane Fe dopants in La1.87Sr0.13Cu0.99Fe0.01O4 is known to enhance stripelike spin and charge density wave (SDW and CDW) order and suppress the superconducting Tc. Here, we show that it also induces highly two-dimensional superconducting correlations that have been argued to be the signatures of a new form of superconducting order, the so-called pair density wave (PDW) order. In addition, using resonant soft x-ray scattering, we find that the two-dimensional superconducting fluctuation is strongly associated with the CDW stripe. In particular, the PDW signature first appears when the correlation length of the CDW stripe grows over eight times the lattice unit (∼8a). These results provide critical conditions for the formation of the PDW order.

Original languageEnglish
Article number167001
JournalPhysical review letters
Volume126
Issue number16
DOIs
Publication statusPublished - 2021 Apr 21

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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