corner
corner
APS » Journals » Phys. Rev. B » Volume 77 » Issue 10
< Previous Article | Next Article >

Phys. Rev. B 77, 104515 (2008) [10 pages]

Two-dimensional vortex behavior in highly underdoped YBa2Cu3O6+x observed by scanning Hall probe microscopy

Download: PDF (598 kB) Buy this article Export: BibTeX or EndNote (RIS)

J. W. Guikema1,*, Hendrik Bluhm1, D. A. Bonn2, Ruixing Liang2, W. N. Hardy2, and K. A. Moler1,†
1Department of Physics and Department of Applied Physics, Stanford University, Stanford, California 94305, USA
2Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1

Received 5 August 2007; revised 10 February 2008; published 17 March 2008

We report scanning Hall probe microscopy of highly underdoped superconducting YBa2Cu3O6+x with Tc ranging from 5 to 15 K, which showed distinct flux bundles with less than one superconducting flux quantum (Φ0) through the sample surface. The sub-Φ0 features occurred more frequently for lower Tc, were more mobile than conventional vortices, and occurred more readily when the sample was cooled with an in-plane field component. We show that these features are consistent with kinked stacks of pancake vortices.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.77.104515
DOI:
10.1103/PhysRevB.77.104515
PACS:
74.25.Ha, 74.25.Qt, 74.72.Bk

*Present address: Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA.

†kmoler@stanford.edu

 
< Previous Article | Next Article >