title: Real-space vortex glass imaging and the vortex phase diagram of SnMo6S8.
abstract: Using scanning tunneling microscopy at 400 mK, we have obtained maps of around 100 vortices in SnMo(6)S(8) from 2-9 T. The orientational and positional disorder at 5 and 9 T show that these are the first large-scale images of a vortex glass. At higher temperature a magnetization peak effect is observed, whose upper boundary coincides with a lambda anomaly in the specific heat. Our data favor a kinetic glass description of the vortex melting transition, indicating that vortex topological disorder persists at fields and temperatures far below the peak effect in low-T(c) superconductors.
authors.affiliation: DPMC-MaNEP, Université de Genève, Quai Ernest-Ansermet 24, 1211 Genève 4, Switzerland.
authors.forename: A P
authors.initials: AP
authors.lastname: Petrović
authors.forename: Y
authors.initials: Y
authors.lastname: Fasano
authors.forename: R
authors.initials: R
authors.lastname: Lortz
authors.forename: C
authors.initials: C
authors.lastname: Senatore
authors.forename: A
authors.initials: A
authors.lastname: Demuer
authors.forename: A B
authors.initials: AB
authors.lastname: Antunes
authors.forename: A
authors.initials: A
authors.lastname: Paré
authors.forename: D
authors.initials: D
authors.lastname: Salloum
authors.forename: P
authors.initials: P
authors.lastname: Gougeon
authors.forename: M
authors.initials: M
authors.lastname: Potel
authors.forename: Ø
authors.initials: Ø
authors.lastname: Fischer