Magnetic Doublon Bound States in the Kondo Lattice Model

Fuente: arXiv

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Autori principali:	Rausch, Roman, Potthoff, Michael, Kawakami, Norio
Natura:	Preprint
Pubblicazione:	2019
Soggetti:	Strongly Correlated Electrons
Accesso online:	Acceder al recurso
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_version_	1866910582691594240
author	Rausch, Roman Potthoff, Michael Kawakami, Norio
author_facet	Rausch, Roman Potthoff, Michael Kawakami, Norio
contents	We present a novel pairing mechanism for electrons, mediated by magnons. These paired bound states are termed ``magnetic doublons''. Applying numerically exact techniques (full diagonalization and the density-matrix renormalization group, DMRG) to the Kondo lattice model at strong exchange coupling $J$ for different fillings and magnetic configurations, we demonstrate that magnetic doublon excitations exist as composite objects with very weak dispersion. They are highly stable, support a novel ``inverse'' colossal magnetoresistance and potentially other effects.
format	Preprint
id	arxiv_https___arxiv_org_abs_1909_11896
institution	arXiv
publishDate	2019
record_format	arxiv
spellingShingle	Magnetic Doublon Bound States in the Kondo Lattice Model Rausch, Roman Potthoff, Michael Kawakami, Norio Strongly Correlated Electrons We present a novel pairing mechanism for electrons, mediated by magnons. These paired bound states are termed ``magnetic doublons''. Applying numerically exact techniques (full diagonalization and the density-matrix renormalization group, DMRG) to the Kondo lattice model at strong exchange coupling $J$ for different fillings and magnetic configurations, we demonstrate that magnetic doublon excitations exist as composite objects with very weak dispersion. They are highly stable, support a novel ``inverse'' colossal magnetoresistance and potentially other effects.
title	Magnetic Doublon Bound States in the Kondo Lattice Model
topic	Strongly Correlated Electrons
url	https://arxiv.org/abs/1909.11896

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