TY - JOUR
T1 - Phase-resolved Higgs response in superconducting cuprates
AU - Chu, Hao
AU - Kim, Min Jae
AU - Katsumi, Kota
AU - Kovalev, Sergey
AU - Dawson, Robert David
AU - Schwarz, Lukas
AU - Yoshikawa, Naotaka
AU - Kim, Gideok
AU - Putzky, Daniel
AU - Li, Zhi Zhong
AU - Raffy, Hélène
AU - Germanskiy, Semyon
AU - Deinert, Jan Christoph
AU - Awari, Nilesh
AU - Ilyakov, Igor
AU - Green, Bertram
AU - Chen, Min
AU - Bawatna, Mohammed
AU - Cristiani, Georg
AU - Logvenov, Gennady
AU - Gallais, Yann
AU - Boris, Alexander V.
AU - Keimer, Bernhard
AU - Schnyder, Andreas P.
AU - Manske, Dirk
AU - Gensch, Michael
AU - Wang, Zhe
AU - Shimano, Ryo
AU - Kaiser, Stefan
N1 - Funding Information:
We thank G. Khaliullin, H. Boschker, M. Minola, and H. Aoki for valuable discussions. Parts of this research were carried out at ELBE at the Helmholtz-Zentrum Dresden -Rossendorf e. V., a member of the Helmholtz Association. We would like to thank Ulf Lehnert, Jochen Teichert and the rest of the ELBE team for assistance. S.Ka. acknowledges support by the Ministerium für Wissenschaft, Forschung und Kunst Baden-Württemberg through the Juniorprofessuren-Programm and a fellowship by the Daimler und Benz Stiftung. R.S. acknowledges partial support by JSPS KAKENHI Grant Nos.18H05324, 15H02102, and the Mitsubishi Foundation. N.A., I.I., S.Ko., M.G. acknowledge support from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 737038 (TRANSPIRE). S.Ka., H.C., M.-J.K. acknowledge support by the Max Planck-UBC-U Tokyo Center for Quantum Materials.
Publisher Copyright:
© 2020, The Author(s).
PY - 2020/12/1
Y1 - 2020/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85083545939&partnerID=8YFLogxK
U2 - 10.1038/s41467-020-15613-1
DO - 10.1038/s41467-020-15613-1
M3 - Article
C2 - 32286291
AN - SCOPUS:85083545939
SN - 2041-1723
VL - 11
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 1793
ER -