Transient superconductivity from electronic squeezing of optically pumped phonons
By D. Kennes, Eli Y. Wilner, David R. Reichman, A. Millis. Nature Physics, 2016
183 citations recorded by the source corpus.
Advances in light sources and time-resolved spectroscopy have made it possible to excite specific atomic vibrations in solids and to observe the resulting changes in electronic properties, but the mechanism by which phonon excitation causes qualitative changes in electronic properties has remained unclear. Here we show that the dominant symmetry-allowed coupling between electron density and dipole active modes implies an electron-density-dependent squeezing of the phonon state that provides an attractive contribution to the electron–electron interaction, independent of the sign of the bare electron–phonon coupling and with a magnitude proportional to the degree of laser-induced phonon excitation. Reasonable excitation amplitudes lead to non-negligible attractive interactions that may cause significant transient changes in electronic properties, including superconductivity. The mechanism is generically applicable to a wide range of systems, offering a promising route to manipulating and controlling electronic phase behaviour in novel materials. Recent developments in advanced light sources have made it possible to transiently alter the electronic properties of materials by exciting specific atomic vibrations in solids. This study provides a theoretical framework for these experiments.
Subfields: Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/43e00ff8486e305376baeeb7cccf1bf7c4fe4a0e
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Citations in the corpus
- Quantum Electrodynamic Control of Matter: Cavity-Enhanced Ferroelectric Phase Transition (2020, background): “Other seminal works studying control of matter by light include Floquet engineering of electronic band structures [8–12], and photo-induced pumping by ultrashort laser pulses for creating metastable nonequilibrium states [13–28].”
- Colloquium: Nonthermal pathways to ultrafast control in quantum materials (2021, background): “…al., 2016; Komnik and Thorwart, 2016; Okamoto, Cavalleri, and Mathey, 2016; Sentef et al., 2016, 2017; Babadi et al., 2017; Coulthard et al., 2017; Kennes et al., 2017; Mazza and Georges, 2017; Murakami et al., 2017; Sentef, 2017; Dasari and Eckstein, 2018; Nava et al., 2018; Wang, Chen et al.,…”