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Published January 2009 | Version Published
Journal Article Open

Observation of vortices and hidden pseudogap from scanning tunneling spectroscopic studies of the electron-doped cuprate superconductor Sr0.9La0.1CuO2

Creators

  • 1. ROR icon California Institute of Technology
  • 2. ROR icon Sogang University

Abstract

We present the first demonstration of vortices in an electron-type cuprate superconductor, the highest Tc(=43 K) electron-type cuprate Sr0.9La0.1CuO2. Our spatially resolved quasiparticle tunneling spectra reveal a hidden low-energy pseudogap inside the vortex core and unconventional spectral evolution with temperature and magnetic field. These results cannot be easily explained by the scenario of pure superconductivity in the ground state of high-Tc superconductivity.

Additional Information

© 2009 EPLA. Received 2 September 2008, accepted for publication 27 November 2008. Published 7 January 2009. Print publication: Issue 1 (January 2009). The work at Caltech was jointly supported by the Moore Foundation and the Kavli Foundation through the Kavli Nanoscience Institute at Caltech, and the NSF Grant DMR-0405088. The work at Sogang University was supported by the Center of Superconductivity from the program of Acceleration Research of MOST/KOSEF of Korea and Special fund of Sogang University. ADB acknowledges the support of Intel Graduate Fellowship.

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Additional details

Identifiers

Eprint ID
12956
Resolver ID
CaltechAUTHORS:TEAepl09

Funding

Gordon and Betty Moore Foundation
Kavli Nanoscience Institute
NSF
DMR-0405088
Korea Science and Engineering Foundation
Sogang University
Intel

Dates

Created
2009-01-10
Created from EPrint's datestamp field
Updated
2022-07-12
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Caltech Custom Metadata

Caltech groups
Kavli Nanoscience Institute , Physics Department