Fano interference of the Higgs mode in cuprate high-Tc superconductors

• DOI: 10.48550/arxiv.2109.09971
• Publication Date: 2021-01-01
• Authors: Hao Chu; Sergey Kovalev; Zi Xiao Wang; Lukas Schwarz; Tao Dong; Liwen Feng; Rafael Haenel; Minjae Kim; Parmida Shabestari; Hoang Le Phuong; Kedar Honasoge; Robert David Dawson; Daniel Putzky; Gideok Kim; Matteo Puviani; Min Chen; Nilesh Awari; Alexey Ponomaryov; Igor Ilyakov; Martin Bluschke; Fabio Boschini; Marta Zonno; Sergey Zhdanovich; MengXing Na; G. Christiani; Г. Логвенов; David J. Jones; A. Damascelli; M. Minola; B. Keimer; Dirk Manske; Nanlin Wang; Jan‐Christoph Dei...; S. Kaiser
• Keywords: Pseudogap

Despite decades of search for the pairing boson in cuprate high-Tc superconductors, its identity still remains debated to date. For this reason, spectroscopic signatures electron-boson interactions cuprates have always been a center attention. example, kinks quasiparticle dispersion observed by angle-resolved photoemission spectroscopy (ARPES) studies motivated decade-long investigation electron-phonon as well electron-paramagnon cuprates. On other hand, overlap between charge-order correlations and pseudogap phase diagram has also generated discussions about potential link them. In present study, we provide fresh perspective on these intertwined using novel approach Higgs spectroscopy, i.e. an amplitude oscillations superconducting order parameter driven terahertz radiation. Uniquely cuprates, observe Fano interference dynamically mode with another collective mode, which reveal be charge density wave fluctuations from extensive doping- magnetic field-dependent study. This finding is further corroborated mean field model describe microscopic mechanism underlying interaction two orders. Our work demonstrates powerful technique investigating orders processes unconventional superconductors.