Photoinduced Prethermalization Phenomena in Correlated Metals. Issue 5 (7th March 2022)

• Record Type: Journal Article
• Authors: Alexander, Marc; Kollar, Marcus
• Other Names: Eckern Ulrich guestEditor.; Gegenwart Philipp guestEditor.
• Is Part Of: Physica status solidi. Volume 259:Issue 5(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-03-07
• Subjects: optical conductivity -- prethermalization -- pump-probe spectroscopy; Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.202100280
• Languages: English
• ISSNs: 0370-1972

Abstract

Abstract : Prethermalization phenomena in weakly interacting Hubbard systems after electric‐field pump pulses with a finite duration are studied. The Hubbard interaction U is taken into account up to second order, by applying the prethermalization paradigm for time‐dependent interaction protocols, and the electric field strength beyond linear order. A scaling behavior with pulse duration is observed for the absorbed energy as well as individual prethermalized momentum occupation numbers, which are attributed to the leading quadratic orders in interaction and electric field. It is shown that a pronounced nonthermal momentum distribution can be created with pump pulses of suitable resonance frequencies, and how to distinguish them from thermal states is discussed. Abstract : When exciting correlated electrons with an electric‐field pump pulse, their prethermal momentum distribution can be optimized through its two pump‐frequency‐dependent factors, shown in the figure: one which depends on the momentum k (shown on left) and one which depends on the interaction U (shown on right).