The control of non-equilibrium phenomena in complex solids is an important
research frontier, encompassing new effects like light induced
superconductivity. Here, we show that coherent optical excitation of molecular
vibrations in the organic conductor K3C60 can induce a non-equilibrium state
with the optical properties of a superconductor. A transient gap in the real
part of the optical conductivity and a low-frequency divergence of the
imaginary part are measured for base temperatures far above equilibrium Tc=20
K. These findings underscore the role of coherent light fields in inducing
emergent order.Comment: 40 pages, 23 figure

A Kuzmenko

A Subedi

A Togo

A. Cantaluppi

A. Cavalleri

A. Perucchi

AF Hebard

CH Brito Cruz

CM Varma

CR Hunt

D Fausti

D. Jaksch

D. Nicoletti

D. Pontiroli

G Kresse

ID Hands

J Orenstein

JE Han

JS Plaskett

L Degiorgi

M Capone

M Först

M Schluter

M. Mitrano

M. Riccò

MC Beard

MG Rice

N Laouini

P Giannozzi

P. Di Pietro

PW Stephens

R Mankowsky

R Singla

S Chakravarty

S Kaiser

S Lupi

S. Kaiser

S. Lupi

S. R. Clark

VP Antropov

W Hu

W Zimmermann

X-D Xiang

Y Iwasa

Nature

English

arXiv

Mitrano, M.

Cantaluppi, A.

Nicoletti, D.

Kaiser, S.

Perucchi, A.

Lupi, S.

Di Pietro, P.

Clark, S. R.

Jaksch, D.

Cavalleri, A.

PONTIROLI, Daniele

RICCO', Mauro

Archivio istituzionale della Ricerca -  Università degli Studi di Parma

Possible light-induced superconductivity in K3 C60 at high temperature

The non-equilibrium control of emergent phenomena in solids is an important research frontier, encompassing effects such as the optical enhancement of superconductivity. Nonlinear excitation of certain phonons in bilayer copper oxides was recently shown to induce superconducting-like optical properties at temperatures far greater than the superconducting transition temperature, Tc. This effect was accompanied by the disruption of competing charge-density-wave correlations, which explained some but not all of the experimental results. Here we report a similar phenomenon in a very different compound, K3C60. By exciting metallic K3C60 with mid-infrared optical pulses, we induce a large increase in carrier mobility, accompanied by the opening of a gap in the optical conductivity. These same signatures are observed at equilibrium when cooling metallic K3C60 below Tc (20 kelvin). Although optical techniques alone cannot unequivocally identify non-equilibrium high-temperature superconductivity, we propose this as a possible explanation of our results

Pontiroli, D.

Riccò, M.

Clark, S.

MPG.PuRe

Possible light-induced superconductivity in K3C60 at high temperature

The non-equilibrium control of emergent phenomena in solids is an important research frontier, encompassing effects such as the optical enhancement of superconductivity(1). Nonlinear excitation(2,3) of certain phonons in bilayer copper oxides was recently shown to induce superconducting-like optical properties at temperatures far greater than the superconducting transition temperature, T-c (refs 4-6). This effect was accompanied by the disruption of competing charge-density-wave correlations(7,8), which explained some but not all of the experimental results. Here we report a similar phenomenon in a very different compound, K3C60. By exciting metallic K3C60 with mid-infrared optical pulses, we induce a large increase in carrier mobility, accompanied by the opening of a gap in the optical conductivity. These same signatures are observed at equilibrium when cooling metallic K3C60 below T-c (20 kelvin). Although optical techniques alone cannot unequivocally identify non-equilibrium high-temperature superconductivity, we propose this as a possible explanation of our results

LUPI, Stefano

Riccò, M.

Archivio della ricerca- Università di Roma La Sapienza

The non-equilibrium control of emergent phenomena in solids is an important research frontier, encompassing effects such as the optical enhancement of superconductivity. Nonlinear excitation of certain phonons in bilayer copper oxides was recently shown to induce superconducting-like optical properties at temperatures far greater than the superconducting transition temperature, Tc (refs 4, 5, 6). This effect was accompanied by the disruption of competing charge-density-wave correlations, which explained some but not all of the experimental results. Here we report a similar phenomenon in a very different compound, K3C60. By exciting metallic K3C60 with mid-infrared optical pulses, we induce a large increase in carrier mobility, accompanied by the opening of a gap in the optical conductivity. These same signatures are observed at equilibrium when cooling metallic K3C60 below Tc (20 kelvin). Although optical techniques alone cannot unequivocally identify non-equilibrium high-temperature superconductivity, we propose this as a possible explanation of our results

Mitrano, Matteo

Cantaluppi, Alice

Nicoletti, Daniele

Kaiser, Stefan

Perucchi, Andrea

Lupi, Stefano

Di Pietro, Paola

Pontiroli, Daniele

Riccò, Mauro

Clark, Stephen R.J.F.

Jaksch, Dieter

Cavalleri, Andrea

Oxford University Research Archive

Possible light-induced superconductivity in K3C60 at high temperature

The non-equilibrium control of emergent phenomena in solids is an important research frontier, encompassing effects such as the optical enhancement of superconductivity1. Nonlinear excitation of certain phonons in bilayer copper oxides was recently shown to induce superconducting-like optical properties at temperatures far greater than the superconducting transition temperature, Tc (refs 4, 5, 6). This effect was accompanied by the disruption of competing charge-density-wave correlations which explained some but not all of the experimental results. Here we report a similar phenomenon in a very different compound, $K_{3}C_{60}$. By exciting metallic $K_{3}C_{60}$ with mid-infrared optical pulses, we induce a large increase in carrier mobility, accompanied by the opening of a gap in the optical conductivity. These same signatures are observed at equilibrium when cooling metallic $K_{3}C_{60}$ below $T_{c}$ (20 kelvin). Although optical techniques alone cannot unequivocally identify non-equilibrium high-temperature superconductivity, we propose this as a possible explanation of our results

DESY

Possible light-induced superconductivity in $\mathrm{K_3C_{60}}$ at high temperature

The non-equilibrium control of emergent phenomena in solids is an important research frontier, encompassing effects such as the optical enhancement of superconductivity. Nonlinear excitation of certain phonons in bilayer copper oxides was recently shown to induce superconducting-like optical properties at temperatures far greater than the superconducting transition temperature, Tc. This effect was accompanied by the disruption of competing charge-density-wave correlations, which explained some but not all of the experimental results. Here we report a similar phenomenon in a very different compound, K3C60. By exciting metallic K3C60 with mid-infrared optical pulses, we induce a large increase in carrier mobility, accompanied by the opening of a gap in the optical conductivity. These same signatures are observed at equilibrium when cooling metallic K3C60 below Tc (20 kelvin). Although optical techniques alone cannot unequivocally identify non-equilibrium high-temperature superconductivity, we propose this as a possible explanation of our results

The non-equilibrium control of emergent phenomena in solids is an important research frontier, encompassing effects such as the optical enhancement of superconductivity. Nonlinear excitation of certain phonons in bilayer copper oxides was recently shown to induce superconducting-like optical properties at temperatures far greater than the superconducting transition temperature, T c (refs 4, 5, 6). This effect was accompanied by the disruption of competing charge-density-wave correlations, which explained some but not all of the experimental results. Here we report a similar phenomenon in a very different compound, K 3 C 60. By exciting metallic K 3 C 60 with mid-infrared optical pulses, we induce a large increase in carrier mobility, accompanied by the opening of a gap in the optical conductivity. These same signatures are observed at equilibrium when cooling metallic K 3 C 60 below T c (20 kelvin). Although optical techniques alone cannot unequivocally identify non-equilibrium high-temperature superconductivity, we propose this as a possible explanation of our results.</p

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