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Coherent dynamics and pump-probe spectra of BCS superconductors

Title data

Papenkort, Thomas ; Axt, Vollrath M. ; Kuhn, Tilmann:
Coherent dynamics and pump-probe spectra of BCS superconductors.
In: Physical Review B. Vol. 76 (2007) . - No. 224522, 7 Seiten.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.76.224522

Abstract in another language

The density matrix formalism is employed to calculate pump-probe spectra of BCS superconductors in the coherent regime. Two dynamical regimes, one adiabatic and one nonadiabatic, can be clearly distinguished. In the adiabatic regime, the modulus of the BCS order parameter can be identified with half the gap in the probe spectra. In the nonadiabatic regime, the order parameter oscillates in real time, whereas the gap observed in the spectra reflects its temporal average. The transition between these regimes is accompanied by a qualitative change of the intensity dependence of the dynamical gap renormalization. Furthermore, a hole-burning effect occurs if the spectral shape of the pump pulse is sufficiently sharp. A probe pulse preceding the pump pulse leads to spectral oscillations, and both the gap before and after the pump pulse are visible in the probe spectra.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: BCS superconductors; nonadiabatic dynamics; Oscillations of the order parameter; pump-probe; coherent dynamics; laser-driven superconductors; dynamics of many-particle correlations
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 25 Oct 2017 08:26
Last Modified: 19 Apr 2018 10:47
URI: https://eref.uni-bayreuth.de/id/eprint/40166