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Multiple Broken Symmetries in Striped La$_{2-x}$Ba$_{x}$CuO$_{4}$ detected by the Field Symmetric Nernst Effect
- Source :
- Phys. Rev. B 93, 054512 (2016)
- Publication Year :
- 2015
-
Abstract
- We report on a thermoelectric investigation of the stripe and superconducting phases of the cuprate La$_{2-x}$Ba$_{x}$CuO$_{4}$ near the $x=1/8$ doping known to host stable stripes. We use the doping and magnetic field dependence of field-symmetric Nernst effect features to delineate the phenomenology of these phases. Our measurements are consistent with prior reports of time-reversal symmetry breaking signatures above the superconducting $T_{{\rm c}}$, and crucially detect a sharp, robust, field-invariant peak at the stripe charge order temperature, $T_{{\rm {\scriptscriptstyle CO}}}$. Our observations suggest the onset of a nontrivial charge ordered phase at $T_{{\rm {\scriptscriptstyle CO}}}$, and the subsequent presence of spontaneously generated vortices over a broad temperature range before the emergence of bulk superconductivity in LBCO.
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 93, 054512 (2016)
- Publication Type :
- Report
- Accession number :
- edsarx.1506.01994
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.93.054512