Quasiparticle relaxation dynamics in heavy fermion compounds

Abstract

We present the first femtosecond studies of electron-phonon (e-ph) thermalization in heavy fermion compounds. The e-ph thermalization time tau_{ep} increases below the Kondo temperature by more than two orders of magnitude as T = 0 K is approached. Analysis using the two-temperature model and numerical simulations based on Boltzmann's equations suggest that this anomalous slowing down of the e-ph thermalization derives from the large electronic specific heat and the suppresion of scattering between heavy electrons and phonons.

4 pages, 3 figures, accepted for publication in Phys. Rev. Lett

References in corpus (3)

• Quasiparticle relaxation dynamics in superconductors with different gap structures: theory and experiments on YBa_{2}Cu_{3}O_{7-δ}
• Single particle and collective excitations in the one-dimensional charge density wave solid K0.3MoO3 probed in real time by femtosecond spectroscopy
• Slow crossover in YbXCu4 intermediate valence compounds

Cited by in corpus (31)

• Electrodynamics of Correlated Electron Materials
• Pair-breaking and superconducting state recovery dynamics in MgB2
• Electron relaxation in metals: Theory and exact analytical solutions
• Ultrafast dynamics of coherent optical phonons and nonequilibrium electrons in transition metals
• Ultrafast Carrier Dynamics in the Large Magnetoresistance Material WTe${}_2$
• Relaxation dynamics of the Holstein polaron
• Observation of Competing Order in a High-$T_c$ Superconductor with Femtosecond Optical Pulses
• Photoexcited electron dynamics in Kondo insulators and heavy fermions
• Non-equilibrium phenomena in superconductors probed by femtosecond time-domain spectroscopy
• Kondo Scaling in the Optical Response of YbIn_(1-x)Ag_xCu_4
• Ultrafast quasiparticle relaxation dynamics in normal metals and heavy fermion materials
• Gap opening and orbital modification of superconducting FeSe above the structural distortion
• Quasiparticle Relaxation Across a Spin Gap in the Itinerant Antiferromagnet UNiGa5
• Charge Density Wave order and electron-phonon coupling in ternary superconductor Bi${}_2$Rh${}_3$Se${}_2$
• Ultrafast Optical Spectroscopy Evidence of Pseudogap and Electron-Phonon Coupling in an Iron-Based Superconductor KCa${}_2$Fe${}_4$As${}_4$F${}_2$
• Hybridization and superconducting gaps in heavy-fermion superconductor PuCoGa5 probed via the dynamics of photoinduced quasiparticles
• Unusual Two-stage Dynamics of the Spin-Lattice Polaron Formation
• Slow down of the electronic relaxation close to the Mott transition
• Unveiling the Hybridization Process in a Quantum Critical Ferromagnet by Ultrafast Optical Spectroscopy
• A photo-induced strange metal with electron and hole quasi-particles
• Ultrafast spectroscopy of quasiparticle dynamics in cuprate superconductors
• A comparative study of nonequilibrium insulator-to-metal transitions in electron-phonon systems
• The Kondo Dynamics of YbIn(1-x)AgxCu4
• Ultrafast terahertz spectroscopy study of Kondo insulating thin film SmB${}_6$: evidence for an emergent surface state
• Excitation and Relaxation of Nonthermal Electron Energy Distributions in Metals with Application to Gold
• Dramatic change of photoexcited quasiparticle relaxation dynamics across Yb valence state transition in YbInCu${}_4$
• Bosonic excitations and electron pairing in an electron-doped cuprate superconductor
• Quasiparticle Relaxation Dynamics in URu${}_{2-x}$Fe${}_x$Si${}_2$ Single Crystals
• Robust hybridization gap in a Kondo Insulator YbB${}_{12}$ probed by femtosecond optical spectroscopy
• Momentum-dependent relaxation dynamics of the doped repulsive Hubbard model
• Photoinduced Nonequilibrium Dynamics in Charge Ordered Materials