Systematic Low-Energy Effective Field Theory for Electron-Doped Antiferromagnets

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dc.creatorBrügger, C.
dc.creatorHofmann, C. P.
dc.creatorKämpfer, F.
dc.creatorMoser, M.
dc.creatorPepe, M.
dc.creatorWiese, U. -J.
dc.date2006-12-14
dc.date.accessioned2026-07-07T11:01:22Z
dc.date.available2026-07-07T11:01:22Z
dc.descriptionIn contrast to hole-doped systems which have hole pockets centered at $(\pm \fracπ{2a},\pm \fracπ{2a})$, in lightly electron-doped antiferromagnets the charged quasiparticles reside in momentum space pockets centered at $(\fracπ{a},0)$ or $(0,\fracπ{a})$. This has important consequences for the corresponding low-energy effective field theory of magnons and electrons which is constructed in this paper. In particular, in contrast to the hole-doped case, the magnon-mediated forces between two electrons depend on the total momentum $\vec P$ of the pair. For $\vec P = 0$ the one-magnon exchange potential between two electrons at distance $r$ is proportional to $1/r^4$, while in the hole case it has a $1/r^2$ dependence. The effective theory predicts that spiral phases are absent in electron-doped antiferromagnets.
dc.description25 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0612363
dc.identifierhttp://arxiv.org/abs/cond-mat/0612363
dc.identifierPhys.Rev.B75:214405,2007
dc.identifierdoi:10.1103/PhysRevB.75.214405
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/187928
dc.subjectStrongly Correlated Electrons
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSystematic Low-Energy Effective Field Theory for Electron-Doped Antiferromagnets
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