Finite-size anomalies of the Drude weight: Role of symmetries and ensembles
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.96.245117
Abstract: We revisit the numerical problem of computing the high temperature spin stiffness, or Drude weight, $D$ of the spin-$1/2$ $XXZ$ chain using exact diagonalization to systematically analyze its dependence on system symmetries and ensemble. Within… read more here.
Keywords: drude weight; ensuremath; ensuremath delta; mathrm ensuremath ... See more keywords
Lower Bounding Diffusion Constant by the Curvature of Drude Weight.
Sign Up to like & getrecommendations! Published in 2017 at "Physical review letters"
DOI: 10.1103/physrevlett.119.080602
Abstract: We establish a general connection between ballistic and diffusive transport in systems where the ballistic contribution in the canonical ensemble vanishes. A lower bound on the Green-Kubo diffusion constant is derived in terms of the… read more here.
Keywords: drude weight; diffusion; lower bound; diffusion constant ... See more keywords
Nonadiabatic Born Effective Charges in Metals and the Drude Weight.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.128.095901
Abstract: In insulators, Born effective charges describe the electrical polarization induced by the displacement of individual atomic sublattices. Such a physical property is at first sight irrelevant for metals and doped semiconductors, where the macroscopic polarization… read more here.
Keywords: born effective; charges metals; drude weight; nonadiabatic born ... See more keywords