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Detecting superconductivity out of equilibrium
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- Paeckel, Sebastian (author)
- Ludwig Maximilians Univ Munchen, Fak Phys, D-80333 Munich, Germany.;Georg August Univ Gottingen, Inst Theoret Phys, D-37077 Gottingen, Germany.
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- Fauseweh, Benedikt (author)
- Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany.;Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA.
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- Osterkorn, Alexander (author)
- Georg August Univ Gottingen, Inst Theoret Phys, D-37077 Gottingen, Germany.
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- Ludwig Maximilians Univ Munchen, Fak Phys, D-80333 Munich, Germany;Georg August Univ Gottingen, Inst Theoret Phys, D-37077 Gottingen, Germany. Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany.;Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA. (creator_code:org_t)
- AMER PHYSICAL SOC, 2020
- 2020
- English.
- In: Physical Review B. - : AMER PHYSICAL SOC. - 2469-9950 .- 2469-9969. ; 101:18
- Journal article (peer-reviewed)
Abstract
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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