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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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Published in: | Nature communications 2016-05, Vol.7 (1), p.11747-11747, Article 11747 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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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. |
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ISSN: | 2041-1723 2041-1723 |
DOI: | 10.1038/ncomms11747 |