[PCP2] Physics and Chemistry2

[PCP2-10] Observation of Nonreciprocal Transport in High-Temperature Superconducting Cuprate La_1.6-xNd_0.4Sr_xCuO₄

*Ryo Motobayashi¹, Masamichi Nakajima², Naoki Ogawa², Yoshinori Tokura^1,2,3 (1. Department of Applied Physics, Graduate School of Engineering, The University of Tokyo (Japan), 2. RIKEN Center for Emergent Matter Science (CEMS) (Japan), 3. Tokyo College, The University of Tokyo (Japan))

Keywords:

Cuprates,Stripe Order,Nonreciprocal Transport

In high-temperature superconducting cuprate La_1.6−xNd_0.4Sr_xCuO₄ (LNSCO), superconductivity coexists with charge–spin stripe order. The stripe order locally breaks spatial inversion symmetry, which can give rise to nonlinear and nonreciprocal transport. We studied nonreciprocal transport in LNSCO single crystals with x = 0.125, where the stripe order is strongly stabilized, by performing lock-in measurement with AC current. We observed a pronounced nonreciprocal response just above the zero-resistivity temperature when current and magnetic field are applied along the [100] and the [010] direction, respectively. This indicates the breaking of inversion symmetry along the c-axis direction. The magnitude of the observed nonreciprocal response was considerably large, implying a unique nonreciprocal transport in stripe-ordered cuprates.