Universität zu Köln

Puviani, M., Baum, A., Ono, S., Ando, Y., Hackl, R. and Manske, D. (2021). Calculation of an Enhanced A1g Symmetry Mode Induced by Higgs Oscillations in the Raman Spectrum of High-Temperature Cuprate Superconductors. Phys. Rev. Lett., 127 (19). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

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Abstract

In superconductors the Anderson-Higgs mechanism allows for the existence of a collective amplitude (Higgs) mode which can couple to eV light mainly in a nonlinear Raman-like process. The experimental nonequilibrium results on isotropic superconductors have been explained going beyond the BCS theory including the Higgs mode. Furthermore, in anisotropic d-wave superconductors strong interaction effects with other modes are expected. Here we calculate the Raman contribution of the Higgs mode from a new perspective, including many-body Higgs oscillations effects and their consequences in conventional, spontaneous Raman spectroscopy. Our results suggest a significant contribution to the intensity of the A1g symmetry Raman spectrum in d-wave superconductors. In order to test our theory, we predict the presence of measurable characteristic oscillations in THz quench-optical probe time-dependent reflectivity experiments.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Puviani, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Baum, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ono, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ando, Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hackl, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Manske, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-582921
DOI:	10.1103/PhysRevLett.127.197001
Journal or Publication Title:	Phys. Rev. Lett.
Volume:	127
Number:	19
Date:	2021
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	1079-7114
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SCATTERING; PROBE Multiple languages Physics, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58292