title: Unusual Nernst effect suggesting time-reversal violation in the striped cuprate superconductor La(2-x)Ba(x)CuO4.
abstract: The striped cuprate La(2-x)Ba(x)CuO(4) (x=1/8) undergoes several transitions below the charge-ordering temperature T(co)=54  K. From Nernst experiments, we find that, below T(co), there exists a large, anomalous Nernst signal e(N,even)(H,T) that is symmetric in field H, and remains finite as H→0. The time-reversal violating signal suggests that, below T(co), vortices of one sign are spontaneously created to relieve interlayer phase frustration.
authors.affiliation: Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
authors.forename: Lu
authors.initials: L
authors.lastname: Li
authors.forename: N
authors.initials: N
authors.lastname: Alidoust
authors.forename: J M
authors.initials: JM
authors.lastname: Tranquada
authors.forename: G D
authors.initials: GD
authors.lastname: Gu
authors.forename: N P
authors.initials: NP
authors.lastname: Ong