title: Critical Kondo destruction in a pseudogap Anderson model: scaling and relaxational dynamics.
abstract: We study the pseudogap Anderson model as a prototype system for critical Kondo destruction. We obtain finite-temperature (T) scaling functions near its quantum-critical point, by using a continuous-time quantum Monte Carlo method and also considering a dynamical large-N limit. We are able to determine the behavior of the scaling functions in the typically difficult to access quantum-relaxational regime (ℏω<k(B)T) and conclude that the relaxation rates for both the spin and single-particle excitations are linear in temperature. We discuss the implications of these results for the quantum-critical phenomena in heavy-fermion metals.
authors: Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA.
authors: Matthew T
authors: MT
authors: Glossop
authors: Stefan
authors: S
authors: Kirchner
authors: J H
authors: JH
authors: Pixley
authors: Qimiao
authors: Q
authors: Si