Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Udina, Mattia"'
Autor:
Katsumi, Kota, Fiore, Jacopo, Udina, Mattia, Romero III, Ralph, Barbalas, David, Jesudasan, John, Raychaudhuri, Pratap, Seibold, Goetz, Benfatto, Lara, Armitage, N. P.
Publikováno v:
Phys. Rev. Lett. 132, 256903 (2024)
Recently developed terahertz (THz) two-dimensional coherent spectroscopy (2DCS) is a powerful technique to obtain materials information in a fashion qualitatively different from other spectroscopies. Here, we utilized THz 2DCS to investigate the THz
Externí odkaz:
http://arxiv.org/abs/2311.16449
Autor:
Fiore, Jacopo, Sellati, Niccolò, Gabriele, Francesco, Castellani, Claudio, Seibold, Goetz, Udina, Mattia, Benfatto, Lara
Publikováno v:
Phys. Rev. B 110 (2024), L060504
Layered cuprates offer a preferential playground for optical non-linearity thanks to the emergence, below Tc, of soft out-of-plane Josephson plasmons. The hallmark of such a non-linearity is the observation of Third Harmonic Generation, that has been
Externí odkaz:
http://arxiv.org/abs/2310.16815
Autor:
Kim, Min-Jae, Kovalev, Sergey, Udina, Mattia, Haenel, Rafael, Kim, Gideok, Puviani, Matteo, Cristiani, Georg, Ilyakov, Igor, de Oliveira, Thales V. A. G., Ponomaryov, Alexey, Deinert, Jan-Christoph, Logvenov, Gennady, Keimer, Bernhard, Manske, Dirk, Benfatto, Lara, Kaiser, Stefan
Ultrafast optical control of quantum systems is an emerging field of physics. In particular, the possibility of light-driven superconductivity with ultrashort laser pulses has attracted much of attention. To identify non-equilibrium superconductivity
Externí odkaz:
http://arxiv.org/abs/2303.03288
Terahertz ionic Kerr effect: Two-phonon contribution to the nonlinear optical response in insulators
Autor:
Basini, Martina, Udina, Mattia, Pancaldi, Matteo, Unikandanunni, Vivek, Bonetti, Stefano, Benfatto, Lara
Publikováno v:
Phys. Rev. B 109, 024309 (2024)
The THz Kerr effect measures the birefringence induced in an otherwise isotropic material by a strong THz pulse driving the Raman-active excitations of the systems. Here we provide experimental evidence of a sizable Kerr response in insulating SrTiO3
Externí odkaz:
http://arxiv.org/abs/2210.14053
Publikováno v:
Phys. Rev. B 106, 094515 (2022)
Multiband superconductors can host collective excitations with marked differences with respect to their single-band counterpart. We first study the spectrum of collective amplitude fluctuations in a clean two-bands superconductor, showing that the sp
Externí odkaz:
http://arxiv.org/abs/2207.00483
Autor:
Giorgianni, Flavio, Udina, Mattia, Cea, Tommaso, Paris, Eugenio, Caputo, Marco, Radovic, Milan, Boie, Larissa, Sakai, Joe, Schneider, Christof W., Johnson, Steven Lee
Nonlinear processes involving frequency-mixing of light fields set the basis for ultrafast coherent spectroscopy of collective modes in solids. In certain semimetals and semiconductors, generation of coherent phonon modes can occur by a displacive fo
Externí odkaz:
http://arxiv.org/abs/2203.03656
Autor:
Udina, Mattia, Fiore, Jacopo, Cea, Tommaso, Castellani, Claudio, Seibold, Goetz, Benfatto, Lara
Publikováno v:
Faraday Discuss. 237, 168-185 (2022)
Recent experiments with strong THz fields in unconventional cuprates superconductors have clearly evidenced an increase of the non-linear optical response below the superconducting critical temperature Tc. As in the case of conventional superconducto
Externí odkaz:
http://arxiv.org/abs/2202.01583
Publikováno v:
Nat Commun 12, 752 (2021)
The hallmark of superconductivity is the rigidity of the quantum-mechanical phase of electrons, responsible for superfluid behavior and Meissner effect. The strength of the phase stiffness is set by the Josephson coupling, which is strongly anisotrop
Externí odkaz:
http://arxiv.org/abs/2006.02296
Akademický článek
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Publikováno v:
Phys. Rev. Lett. 124, 197602 (2020)
Raman experiments on bulk FeSe revealed that the low-frequency part of $B_{1g}$ Raman response $R_{B_{1g}}$, which probes nematic fluctuations, rapidly decreases below the nematic transition at $T_n \sim 85$K. Such behavior is usually associated with
Externí odkaz:
http://arxiv.org/abs/1908.11361