Unusual Nernst effect suggestive of time-reversal violation in the striped cuprate La${}_{2-x}$Ba${}_x$CuO${}_4$

Abstract

The striped cuprate La${}_{2-x}$Ba${}_x$CuO${}_4$ ($x=\frac{1}{8})$ 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 $H\to 0$. The time-reversal violating signal suggests that, below $T_{co}$, vortices of one sign are spontaneously created to relieve interlayer phase frustration.

5 pages, 4 figures

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• Enhanced charge stripe order of superconducting La(2-x)Ba(x)CuO(4) in a magnetic field
• Magneto-optical signatures of a cascade of transitions in La${}_2-x$Ba${}_x$CuO${}_4$
• Evidence of Chiral Order in the Charge-Ordered Phase of Superconducting La1.875Ba0.125Cuo4 Single Crystals Using Polar Kerr-Effect Measurements
• Time reversal symmetry breaking superconductivity in topological materials
• Uniaxial linear resistivity of superconducting La(1.905)Ba(0.095)CuO(4) induced by an external magnetic field
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• Crisscrossed stripe order from interlayer tunneling in hole-doped cuprates
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• Fluctuations and Higgs mechanism in Under-Doped Cuprates: a Review
• Prediction and description of a chiral pseudogap phase
• Transport Properties of Stripe-Ordered High Tc Cuprates
• Multiple Broken Symmetries in Striped La${}_{2-x}$Ba${}_x$CuO${}_4$ detected by the Field Symmetric Nernst Effect
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