168 citations · 1.8k across the 31 of their papers we have counts for
11 papers · 1 filter
Unveiling the pairing Symmetry of the superconducting Sn/Si(111) via angle-resolved THz pump spectroscopy
Mattia Iannetti, Tommaso Cea, Cesare Tresca +2
Doping tin surface epitaxially grown on silicon, Sn/Si(111), with boron atoms yields the appearance of a superconducting (SC) phase below K. Even though the pairing me…
Comment on: Calculation of an Enhanced Symmetry Mode Induced by Higgs Oscillations in the Raman Spectrum of High-Temperature Cuprate Superconductors
L. Benfatto, C. Castellani, T. Cea
In a recent manuscript Phys. Rev. Lett. 127, 197001 (2021) Puviani et al. claim that the Higgs mode gives an enhancement of the Raman response in the symmetric Raman chann…
THz non-linear optical response in cuprates: predominance of the BCS response over the Higgs mode
Mattia Udina, Jacopo Fiore, Tommaso Cea +3
Recent experiments with strong THz fields in unconventional cuprates superconductors have clearly evidenced an increase of the non-linear optical response below the superconducting…
Unconventional superconductivity due to interband polarization
Valentin Crépel, Tommaso Cea, Liang Fu +1
We analyze in detail the superconductivity that arises in an extended Hubbard model describing a multiband system with repulsive interactions. We show that virtual interband proces…
Impact of electrostatic fields in layered crystalline BCS superconductors
Luca Chirolli, Tommaso Cea, Francesco Giazotto
Motivated by recent experiments reporting the suppression of the critical current in superconducting Dayem bridges by the application of strong electrostatic fields, in this work w…
Optical signatures of the superconducting Goldstone mode in granular aluminum: experiments and theory
Uwe S. Pracht, Tommaso Cea, Nimrod Bachar +7
Recent advances in the experimental growth and control of disordered thin films, heterostructures, and interfaces provide a fertile ground for the observation and characterisation…
Higgs-mode radiance and charge-density-wave order in 2H-NbSe
Romain Grasset, Tommaso Cea, Yann Gallais +5
Despite being usually considered two competing phenomena, charge-density-wave and superconductivity coexist in few systems, the most emblematic one being the transition metal dicha…
Signature of the Leggett mode in the A1g Raman response: from MgB2 to iron-based superconductors
T. Cea, L. Benfatto
The Raman response in a superconductor is a powerful probe to investigate the symmetry of the superconducting gap. Here we show that in a multiband superconductor it also offers th…
Non-linear optical effects and third-harmonic generation in superconductors: Cooper-pairs vs Higgs mode contribution
T. Cea, C. Castellani, L. Benfatto
The recent observation of a transmitted Thz pulse oscillating at three times the frequency of the incident light paves the way to a new protocol to access resonant excitations in a…
Non-relativistic dynamics of the amplitude (Higgs) mode in superconductors
T. Cea, C. Castellani, G. Seibold +1
Despite the formal analogy with the Higgs particle, the amplitude fluctuations of the order parameter in weakly-coupled superconductors do not identify a real mode with a Lorentz-i…
Nature and Raman signatures of the Higgs amplitude mode in the coexisting superconducting and charge-density-wave state
T. Cea, L. Benfatto
We investigate the behavior of the Higgs (amplitude) mode when superconductivity emerges on a preexisting charge-density-wave state. We show that the weak overdamped square-root si…