Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 18: Superconductivity: Poster
TT 18.20: Poster
Montag, 18. März 2024, 15:00–18:00, Poster C
Non-linear optical effects of superconductors:
light-induced vs. dc supercurrents
— •Jakob Dolgner and Dirk Manske —
Max Planck Institute for Solid State Research, Stuttgart, Germany
It is established that the presence of supercurrent enables THz-spectroscopy Second Harmonic Generation (SHG) even in otherwise inversion symmetric superconductors which do not show this response in equilibrium [1,2]. Recently, an SHG resonance at Ω = 2 Δ was observed in Nb3 Sn in the absence of a static supercurrent and accredited to dynamical symmetry breaking [3]. On the other hand, such effects have never been observed in prior experiments [4]. We analyse the possible origins for this discrepancy in observations. In particular, we illuminate the mechanism of dynamical symmetry breaking and subsequent supercurrent generation proposed in [3].
[1] Nakamura et al., PRL 122.25 (2019)
[2] Moor et al., PRL 118.4 (2017)
[3] Yang et al., Nat. Photonics 13.10 (2019)
[4] Matsunaga et al., Science 345.6201 (2014)
Keywords: Second Harmonic Generation; Higgs Mode; Non-linear Optics; Supercurrent; Dynamical symmetry breaking