Unveiling Unequivocal Charge Stripe Order in a Prototypical Cuprate Superconductor
Jaewon Choi, Qisi Wang, Simon Jöhr, N. B. Christensen, J. Küspert, D. Bucher, Dominik Biscette, Mark H. Fischer, M. Hücker, T. Kurosawa, N. Momono, M. Oda, Oleh Ivashko, M. v. Zimmermann, M. Janoschek, J. Chang
Abstract
In the cuprates, high-temperature superconductivity, spin-density-wave order, and charge-density-wave (CDW) order are intertwined, and symmetry determination is challenging due to domain formation. We investigated the CDW in the prototypical cuprate La_{1.88}Sr_{0.12}CuO_{4} via x-ray diffraction employing uniaxial pressure as a domain-selective stimulus to establish the unidirectional nature of the CDW unambiguously. A fivefold enhancement of the CDW amplitude is found when homogeneous superconductivity is partially suppressed by magnetic field. This field-induced state provides an ideal search environment for a putative pair-density-wave state.