Multiple broken symmetries in striped La2−xBaxCuO4 detected by the field-symmetric Nernst effect

Multiple broken symmetries in striped La2−xBaxCuO4 detected by the field-symmetric Nernst effect

We report a thermoelectric investigation of the stripe and superconducting phases of the cuprate La2−xBaxuO4 near x=1/8. We vary the doping and the magnetic field to identify features in the field-symmetric Nernst effect consistent with the reports of time-reversal symmetry breaking above the superc...

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Bibliographic Details
Main Authors: Tee, Xian Yang, Ito, T., Ushiyama, T., Tomioka, Y., Panagopoulos, Christos, Soumyanarayanan, Anjan
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2018
Subjects:
Cuprates
Pseudogap Phase
DRNTU::Science::Physics
Online Access:https://hdl.handle.net/10356/80437
http://hdl.handle.net/10220/46546
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Institution: Nanyang Technological University
Language: English
Description
Summary:We report a thermoelectric investigation of the stripe and superconducting phases of the cuprate La2−xBaxuO4 near x=1/8. We vary the doping and the magnetic field to identify features in the field-symmetric Nernst effect consistent with the reports of time-reversal symmetry breaking above the superconducting Tc. Crucially, we further detect a field-invariant peak at the stripe charge order temperature, TCO. Our observations suggest the onset of a nontrivial charge ordered phase at TCO, and the subsequent presence of spontaneously generated vortices before the emergence of bulk superconductivity.

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