TY - JOUR
T1 - Unusual nernst effect suggesting time-reversal violation in the striped cuprate superconductor La 2-xBa xCuO 4
AU - Li, Lu
AU - Alidoust, N.
AU - Tranquada, J. M.
AU - Gu, G. D.
AU - Ong, N. P.
PY - 2011/12/27
Y1 - 2011/12/27
N2 - The striped cuprate La 2-xBa xCuO 4 (x=18) undergoes several transitions below the charge-ordering temperature T co=54K. 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.
AB - The striped cuprate La 2-xBa xCuO 4 (x=18) undergoes several transitions below the charge-ordering temperature T co=54K. 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.
UR - http://www.scopus.com/inward/record.url?scp=84555202689&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84555202689&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.107.277001
DO - 10.1103/PhysRevLett.107.277001
M3 - Article
C2 - 22243323
AN - SCOPUS:84555202689
SN - 0031-9007
VL - 107
JO - Physical review letters
JF - Physical review letters
IS - 27
M1 - 277001
ER -