Orbital-selective time-domain signature of nematicity dynamics in the charge-density-wave phase of La(1.65)Eu(0.2)Sr(0.15)CuO(4)

• DOI: 10.48550/arxiv.2209.11528
• Publication Date: 2024-05-31
• Authors: Martin Bluschke; Naman K. Gupta; Hoyoung Jang; Ali. A. Husain; Byungjune Lee; Minjune Kim; MengXing Na; Brandon Dos Remedios; Steef Smit; Peter Moen; Sang-Youn Park; Minseok Kim; Dogeun Jang; Hyeongi Choi; Ronny Sutarto; Alexander H. Reid; Georgi L. Dakovski; Giacomo Coslovich; Quynh L. Nguyen; Nicolas G. Burdet; Ming-Fu Lin; Alexandre Revcole...; Jae-Hoon Park; Jochen Geck; Joshua J. Turner; Andrea Damascelli; David G. Hawthorn
• Keywords: 0301 basic medicine; Superconductivity (cond-mat.supr-con); Condensed Matter - Strongly Correlated Electrons; 03 medical and health sciences; Strongly Correlated Electrons (cond-mat.str-el); Condensed Matter - Superconductivity; Physical Sciences; FOS: Physical sciences

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 translational-symmetry 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.