"A grand aspiration of cavity quantum materials research is to uncover fundamentally new routes for controlling properties of matter by judiciously tailoring the quantum electromagnetic environment. Experiments with dark cavities revealed modified transport properties in the integer and fractional quantum Hall states of a 2D electron gas, as well as cavity-assisted thermal control of the metal-to-insulator transition in charge-density-wave systems."
"Pioneering theoretical works on cavity control of superconductivity explored dark-cavity modification of phonon-mediated pairing through an increase in electron-phonon coupling by means of phonon polaritons, Amperean pairing directly mediated through dark-cavity photons, as well as the driven-cavity extension of the Eliashberg effect."
"We work with κ-ET, a widely studied layered organic salt that superconducts below the transition temperature Tc = 11.5 K. We make use of an electromagnetic environment structured by the dipole-active phonons of a thin vdW hyperbolic material, hBN. Hyperbolicity occurs when the permittivity has opposite signs along different axes and results in a highly enhanced electromagnetic environment."
Strong collective interactions among electrons, spins, and crystal lattices in solids produce emergent effects and diverse electronic and magnetic phases. Cavity quantum materials research explores whether quantum electromagnetic fluctuations in photonic cavities can trigger phase transitions and generate novel quantum states. Recent experiments demonstrate cavity-modified transport in quantum Hall systems and thermal control of metal-insulator transitions. Theoretical work examines cavity-enhanced superconductivity through phonon polaritons and photon-mediated pairing mechanisms. This research focuses on superconductivity as a purely electronic phase transition using κ-ET organic salt and hyperbolic metastructures based on hBN, which exhibits enhanced electromagnetic properties through opposite permittivity signs along different axes.
#cavity-quantum-materials #superconductivity #hyperbolic-metastructures #phase-transitions #quantum-states-of-matter
Read at Nature
Unable to calculate read time
Collection
[
|
...
]