Detecting superconductivity out of equilibrium

Paeckel, Sebastian; Fauseweh, Benedikt; Osterkorn, Alexander; Koehler, Thomas; Manske, Dirk und Manmana, Salvatore R. (2020): Detecting superconductivity out of equilibrium. In: Physical Review B, Bd. 101, Nr. 18, 180507

Abstract

Recent pump-probe experiments on underdoped cuprates and similar systems suggest the existence of a transient superconducting state above T-c. This poses the question of how to reliably identify the emergence of long-range order, in particular superconductivity, out of equilibrium. We investigate this point by studying a quantum quench in an extended Hubbard model and by computing various observables, which are used to identify (quasi-)long-range order in equilibrium. Our findings imply that, in contrast to current experimental studies, it does not suffice to study the time evolution of the optical conductivity to identify superconductivity. In turn, we suggest to utilize time-resolved angle-resolved photoemission spectroscopy experiments to probe for the formation of a condensate in the two-particle channel.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 2469-9950
• Sprache: Englisch