Phase-resolved Higgs response in superconducting cuprates

Hao Chu, Min-Jae Kim, Kota Katsumi, Sergey Kovalev, Robert David Dawson, Lukas Schwarz, Naotaka Yoshikawa, Gideok Kim, Daniel Putzky, Zhi Zhong Li, Hélène Raffy, Semyon Germanskiy, Jan-Christoph Deinert, Nilesh Awari, Igor Ilyakov, Bertram Green, Min Chen, Mohammed Bawatna, Georg Cristiani, Gennady Logvenov, Yann Gallais, Alexander V. Boris, Bernhard Keimer, Andreas P. Schnyder, Dirk Manske, Michael Gensch, Zhe Wang (), Ryo Shimano () and Stefan Kaiser ()
Additional contact information
Hao Chu: Max Planck Institute for Solid State Research
Min-Jae Kim: Max Planck Institute for Solid State Research
Kota Katsumi: University of Tokyo
Sergey Kovalev: Helmholtz-Zentrum Dresden-Rossendorf
Robert David Dawson: Max Planck Institute for Solid State Research
Lukas Schwarz: Max Planck Institute for Solid State Research
Naotaka Yoshikawa: University of Tokyo
Gideok Kim: Max Planck Institute for Solid State Research
Daniel Putzky: Max Planck Institute for Solid State Research
Zhi Zhong Li: Laboratoire de Physique des Solides (CNRS UMR 8502), Bâtiment 510, Université Paris-Saclay
Hélène Raffy: Laboratoire de Physique des Solides (CNRS UMR 8502), Bâtiment 510, Université Paris-Saclay
Semyon Germanskiy: Helmholtz-Zentrum Dresden-Rossendorf
Jan-Christoph Deinert: Helmholtz-Zentrum Dresden-Rossendorf
Nilesh Awari: Helmholtz-Zentrum Dresden-Rossendorf
Igor Ilyakov: Helmholtz-Zentrum Dresden-Rossendorf
Bertram Green: Helmholtz-Zentrum Dresden-Rossendorf
Min Chen: Helmholtz-Zentrum Dresden-Rossendorf
Mohammed Bawatna: Helmholtz-Zentrum Dresden-Rossendorf
Georg Cristiani: Max Planck Institute for Solid State Research
Gennady Logvenov: Max Planck Institute for Solid State Research
Yann Gallais: Université de Paris, Bâtiment Condorcet
Alexander V. Boris: Max Planck Institute for Solid State Research
Bernhard Keimer: Max Planck Institute for Solid State Research
Andreas P. Schnyder: Max Planck Institute for Solid State Research
Dirk Manske: Max Planck Institute for Solid State Research
Michael Gensch: Technische Universität Berlin, Institut für Optik und Atomare Physik
Zhe Wang: Helmholtz-Zentrum Dresden-Rossendorf
Ryo Shimano: University of Tokyo
Stefan Kaiser: Max Planck Institute for Solid State Research

Nature Communications, 2020, vol. 11, issue 1, 1-6

Abstract: Abstract In high-energy physics, the Higgs field couples to gauge bosons and fermions and gives mass to their elementary excitations. Experimentally, such couplings can be inferred from the decay product of the Higgs boson, i.e., the scalar (amplitude) excitation of the Higgs field. In superconductors, Cooper pairs bear a close analogy to the Higgs field. Interaction between the Cooper pairs and other degrees of freedom provides dissipation channels for the amplitude mode, which may reveal important information about the microscopic pairing mechanism. To this end, we investigate the Higgs (amplitude) mode of several cuprate thin films using phase-resolved terahertz third harmonic generation (THG). In addition to the heavily damped Higgs mode itself, we observe a universal jump in the phase of the driven Higgs oscillation as well as a non-vanishing THG above Tc. These findings indicate coupling of the Higgs mode to other collective modes and potentially a nonzero pairing amplitude above Tc.

Date: 2020
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DOI: 10.1038/s41467-020-15613-1

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