Berlin 2024 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 68: Superconductivity: Properties and Electronic Structure
TT 68.3: Vortrag
Donnerstag, 21. März 2024, 10:00–10:15, H 3010
Tracing the Higgs-CDW interplay in coherently-driven superconductors — •Liwen Feng1,3, Tim Priessnitz1, Jan-Christoph Deinert4, Sergey Kovalev4, Stefan Kaiser1,3, and Hao Chu1,2 — 1Max Planck Institute for Solid State Research, Stuttgart, Germany — 2Shanghai Jiaotong University, China — 3Technical University Dresden, Germany — 4Helmholtz-Zentrum Dresden-Rossendorf, Germany
Superconductivity (SC) and charge-density-wave (CDW) often coexist in the low temperature phase diagrams of various materials, particularly high-Tc superconductors. Exploring the interplay between SC and CDW has become crucial in understanding the physics of these complex systems. We have established Higgs Spectroscopy using phase-resolved THz-Third Harmonic Generation to study the order parameter dynamics in superconductors [1]. Our investigations of the dynamics between THz-driven CDW and Higgs amplitude modes throughout several families of superconductors ranging from 2H-NbSe2, hole- and electron-doped cuprates La2−xSrxCuO4 (x∼0.12) and La2−xCexCuO4 (x∼0.1), to bismuthate superconductors BaRbBiO. We describe the interplay of Higgs and the CDW mode in the framework of a generalized Fano model. Going beyond the amplitude and phase response [2], the time-domain reveals a dynamical interplay of a Higgs-CDW hybrid in the THz driven state [3].
[1] H. Chu et al., Nat. Commun. 11 (2020) 1793.
[2] H. Chu, et al., Nat Commun. 14 (2023) 1343.
[3] L. Feng et al., Phys. Rev. B, 108 (2023) L100504.
Keywords: Higgs Spectroscopy; Superconductivity; Charge density wave; Phase-resolved THz-Third Harmonic Generation