Observation of an hexatic vortex glass in flux lattices of the high-Tc superconductor Bi2.1 Sr1.9 Ca0.9 Cu2 O8+δ

Journal Article

We report observation of hexatic order in Abrikosov flux lattices in very clean crystals of the high-Tc superconductor Bi2.1Sr1.9Ca0.9Cu2O8+δ (BSCCO). Our experiments consist of in situ magnetic decoration of the flux lattice at 4.2 K. Analysis of the decoration images shows that the positional order decays exponentially with a correlation length of a few lattice constants while the orientational order persists for hundreds of lattice constants and decays algebraically with an exponent η6 = 0.6 ± 0.01. Our results confirm recent theoretical speculation that the positional order should be far more sensitive to disorder than the orientational order and that the low-temperature ordered phase of the flux lines in these systems might be an hexatic glass. © 1991.

Full Text

Duke Authors

Cited Authors

  • Bishop, DJ; Gammel, PL; Murray, CA; Mitzi, DB; Kapitulnik, A

Published Date

  • 1991

Published In

Volume / Issue

  • 169 / 1-4

Start / End Page

  • 72 - 79

International Standard Serial Number (ISSN)

  • 0921-4526

Digital Object Identifier (DOI)

  • 10.1016/0921-4526(91)90210-6