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Scanning tunneling spectroscopic evidence for magnetic-field-induced microscopic orders in the high-T_c superconductor YBa_2Cu_3O_(7-δ)

Beyer, A. D. and Grinolds, M. S. and Teague, M. L. and Tajima, S. and Yeh, N.-C. (2009) Scanning tunneling spectroscopic evidence for magnetic-field-induced microscopic orders in the high-T_c superconductor YBa_2Cu_3O_(7-δ). Europhysics Letters, 87 (3). Art. No. 37005. ISSN 0295-5075. https://resolver.caltech.edu/CaltechAUTHORS:20090923-143136744

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Abstract

We report spatially resolved tunneling spectroscopic evidence for field-induced microscopic orders in the high-T_c superconductor YBa_2Cu_3O_(7-δ). The spectral characteristics inside vortices reveal a pseudogap (V_(CO)) larger than the superconducting gap (Δ_(SC)) as well as a subgap (Δ') smaller than Δ_(SC), and the spectral weight shifts steadily from Δ_(SC) to V_(CO) and Δ' upon increasing magnetic field. Additionally, energy-independent conductance modulations at 3.6 and 7.1 lattice constants along the Cu-O bonding directions and at 9.5 lattice constants along the nodal directions are manifested in the vortex state. These wave vectors differ fundamentally from the strongly dispersive modes due to Bogoliubov quasiparticle scattering interferences and may be associated with field-induced microscopic orders of pair-, charge- and spin-density waves.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1209/0295-5075/87/37005DOIArticle
http://www.iop.org/EJ/abstract/0295-5075/87/3/37005/PublisherArticle
ORCID:
AuthorORCID
Yeh, N.-C.0000-0002-1826-419X
Additional Information:© EPLA 2009. Received 5 April 2009, accepted for publication 23 July 2009. Published 26 August 2009. Print publication: Issue 3 (August 2009). This work 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 authors thank Dr. A. I. Rykov for growing the single crystal used in this work and Profs. S. A. Kivelson and S.-C. Zhang for useful discussions. ADB acknowledges the support of Intel Graduate Fellowship.
Group:Kavli Nanoscience Institute
Funders:
Funding AgencyGrant Number
Gordon and Betty Moore FoundationUNSPECIFIED
Kavli FoundationUNSPECIFIED
Kavli Nanoscience InstituteUNSPECIFIED
NSFDMR-0405088
IntelUNSPECIFIED
Issue or Number:3
Classification Code:PACS numbers: 74.50.+r, 74.25.Op, 74.72.Bk.
Record Number:CaltechAUTHORS:20090923-143136744
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20090923-143136744
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16029
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:06 Oct 2009 18:20
Last Modified:03 Oct 2019 01:06

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