Volume 87, Number 3, August 2009
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||26 August 2009|
Scanning tunneling spectroscopic evidence for magnetic-field–induced microscopic orders in the high-Tc superconductor YBa2Cu3O7-
Department of Physics, California Institute of Technology - Pasadena, CA 91125, USA
2 Department of Physics, Osaka University - Osaka 560-0043, Japan
Corresponding author: email@example.com
Accepted: 23 July 2009
We report spatially resolved tunneling spectroscopic evidence for field-induced microscopic orders in the high-Tc superconductor YBa2Cu3O7-. The spectral characteristics inside vortices reveal a pseudogap larger than the superconducting gap as well as a subgap smaller than , and the spectral weight shifts steadily from to and 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.
PACS: 74.50.+r – Tunneling phenomena; point contacts, weak links, Josephson effects / 74.25.Op – Mixed states, critical fields, and surface sheaths / 74.72.Bk – Y-based cuprates
© EPLA, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.