Orbital-selective time-domain signature of nematicity dynamics in the charge-density-wave phase of La1.65Eu0.2Sr0.15CuO4

• 成果类型: Article
• 署名作者: Bluschke, Martin; Gupta, Naman K.; Jang, Hoyoung; Husain, Ali. A.; Lee, Byungjune; Kim, Minjune; Na, Mengxing; Dos Remedios, Brandon; Smit, Steef; Moen, Peter; Park, Sang-Youn; Kim, Minseok; Jang, Dogeun; Choi, Hyeongi; Sutarto, Ronny; Reid, Alexander H.; Dakovski, Georgi L.; Coslovich, Giacomo; Nguyen, Quynh L.; Burdet, Nicolas G.; Lin, Ming-Fu; Revcolevschi, Alexandre; Park, Jae-Hoon; Geck, Jochen; Turner, Joshua J.; Damascelli, Andrea; Hawthorn, David G.
• 署名单位: University of British Columbia; University of British Columbia; University of Waterloo; Pohang University of Science & Technology (POSTECH); Pohang University of Science & Technology (POSTECH); Pohang University of Science & Technology (POSTECH); University of Saskatchewan; Stanford University; United States Department of Energy (DOE); SLAC National Accelerator Laboratory; Stanford University; Stanford University; United States Department of Energy (DOE); SLAC National Accelerator Laboratory; Stanford University; United States Department of Energy (DOE); SLAC National Accelerator Laboratory; Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CNRS - Institute of Chemistry (INC); Technische Universitat Dresden; Technische Universitat Dresden
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-14183
• DOI: 10.1073/pnas.2400727121
• 发表日期: 2024-06-04
• 关键词: rotational symmetry; topological defects; ORDER; superconductivity; fluctuations; state; instability; magnetism; matter

摘要

Understanding the interplay between charge, nematic, and structural ordering tendencies in cuprate superconductors is critical to unraveling their complex phase diagram. Using pump-probe time -resolved resonant X-ray scattering on the (0 0 1) Bragg peak at the Cu L 3 and O K resonances, we investigate nonequilibrium dynamics of Q a = Q b = 0 nematic order and its association with both charge density wave (CDW) order and lattice dynamics in La 1 . 65 Eu 0 . 2 Sr 0 . 15 CuO 4 . The orbital selectivity of the resonant X-ray scattering cross-section allows nematicity dynamics associated with the planar O 2 p and Cu 3 d states to be distinguished from the response of anisotropic lattice distortions. A direct time -domain comparison of CDW translationalsymmetry breaking and nematic rotational -symmetry breaking reveals that these broken symmetries remain closely linked in the photoexcited state, consistent with the stability of CDW topological defects in the investigated pump fluence regime.