AI Article Synopsis
- The study explores the non-equilibrium control of emergent phenomena in solids, particularly focusing on how nonlinear phonon excitations in bilayer copper oxides can enhance superconductivity at higher temperatures than usual.
- This research extends to the compound K3C60, where mid-infrared optical pulses increase carrier mobility and alter optical conductivity, similar to behaviors seen at equilibrium below the superconducting transition temperature.
- The findings suggest a potential link to non-equilibrium high-temperature superconductivity, although optical techniques alone can’t definitively confirm this hypothesis.
Article Abstract
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 4-6). 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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4820655 | PMC |
| http://dx.doi.org/10.1038/nature16522 | DOI Listing |
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