Coexistence of competing orders with two energy gaps in real and momentum space in the high temperature superconductor Bi2Sr2-xLaxCuO6+δ

J. H. Ma, Z. H. Pan, F. C. Niestemski, M. Neupane, Y. M. Xu, P. Richard, K. Nakayama, T. Sato, T. Takahashi, H. Q. Luo, L. Fang, H. H. Wen, Ziqiang Wang, H. Ding, V. Madhavan

Research output: Contribution to journalArticlepeer-review

90 Citations (Scopus)

Abstract

Through a combined scanning tunneling microscopy and angle-resolved photoemission spectroscopy study, we report the observation of two distinct gaps (a small and a large gap) that coexist both in real space and in the antinodal region of momentum space, below the superconducting transition temperature (Tc) of Bi2Sr2-xLaxCuO6+δ. We show that the small gap is associated with superconductivity. The large-gap persists above Tc, and seems linked to observed charge ordering. We find a strong correlation between the large and small gaps suggesting that they are affected by similar physical processes.

Original languageEnglish
Article number207002
JournalPhysical review letters
Volume101
Issue number20
DOIs
Publication statusPublished - 2008 Nov 13

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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