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Bipartite electronic superstructures in the vortex core of Bi2Sr2CaCu2O8+δ

The central issue in the physics of cuprate superconductivity is the mutual relationship among superconductivity, pseudogap and broken-spatial-symmetry states. A magnetic field B suppresses superconductivity, providing an opportunity to investigate the competition among these states. Although variou...

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Bibliographic Details
Published in:Nature communications 2016-05, Vol.7 (1), p.11747-11747, Article 11747
Main Authors: Machida, T., Kohsaka, Y., Matsuoka, K., Iwaya, K., Hanaguri, T., Tamegai, T.
Format: Article
Language:English
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Summary:The central issue in the physics of cuprate superconductivity is the mutual relationship among superconductivity, pseudogap and broken-spatial-symmetry states. A magnetic field B suppresses superconductivity, providing an opportunity to investigate the competition among these states. Although various B -induced electronic superstructures have been reported, their energy, spatial and momentum-space structures are unclear. Here, we show using spectroscopic-imaging scanning tunnelling microscopy on Bi 2 Sr 2 CaCu 2 O 8+ δ that there are two distinct B -induced electronic superstructures, both being localized in the vortex core but appearing at different energies. In the low-energy range where the nodal Bogoliubov quasiparticles are well-defined, we observe the so-called vortex checkerboard that we identify as the B -enhanced quasiparticle interference pattern. By contrast, in the high-energy region where the pseudogap develops, the broken-spatial-symmetry patterns that pre-exist at B =0 T is locally enhanced in the vortex core. This evidences the competition between superconductivity and the broken-spatial-symmetry state that is associated with the pseudogap. Field-induced electronic structures with spatial, momentum and energy resolution reveal the nature of interaction among multiple phases in correlated materials. Here, Machida et al . report two magnetic field-induced electronic superstructures in Bi 2 Se 2 CaCu 2 O 8+ δ , evidencing competition between superconductivity and emerging states.
ISSN:2041-1723
2041-1723
DOI:10.1038/ncomms11747