Metallic hydrogen and hydride materials stand as promising avenues to achieve room-temperature superconductivity.Characterized by their high phonon frequencies and moderate coupling strengths,several high-pressure hyd...Metallic hydrogen and hydride materials stand as promising avenues to achieve room-temperature superconductivity.Characterized by their high phonon frequencies and moderate coupling strengths,several high-pressure hydrides were theoretically predicted to exhibit transition temperatures(Tc)exceeding 250 K,a claim further substantiated by experimental evidence.In an effort to push Tc beyond room temperature,we introduce a dynamical method that involves stimulating hydrides with mid-infrared lasers.Employing Floquet first-principles simulations,we observe that in a nonequilibrium state induced by light,both the electronic density of states and the coupling to highenergy phonons see notable enhancements.These simultaneous improvements collectively could potentially result in an estimated 20%–30%rise in Tc in practical pump conditions.Our theoretical investigation,therefore,offers a novel strategy to potentially raise the Tc of hydrides above room temperature.展开更多
基金supported by the Air Force Office of Scientific Research Young Investigator Program under grant FA9550-23-1-0153W.-C.C. and Y.W. also acknowledge support from the National Science Foundation (NSF) award DMR-2132338+1 种基金A.D.S. acknowledges support from the NSF awards No. OIA-2148653 and DMR-2142801Simulation results were obtained using the Frontera computing system at the Texas Advanced Computing Center. Frontera is made possible by NSF Award No. OAC-1818253.
文摘Metallic hydrogen and hydride materials stand as promising avenues to achieve room-temperature superconductivity.Characterized by their high phonon frequencies and moderate coupling strengths,several high-pressure hydrides were theoretically predicted to exhibit transition temperatures(Tc)exceeding 250 K,a claim further substantiated by experimental evidence.In an effort to push Tc beyond room temperature,we introduce a dynamical method that involves stimulating hydrides with mid-infrared lasers.Employing Floquet first-principles simulations,we observe that in a nonequilibrium state induced by light,both the electronic density of states and the coupling to highenergy phonons see notable enhancements.These simultaneous improvements collectively could potentially result in an estimated 20%–30%rise in Tc in practical pump conditions.Our theoretical investigation,therefore,offers a novel strategy to potentially raise the Tc of hydrides above room temperature.
