Spiral phases and two-particle bound states from a systematic low-energy effective theory for magnons, electrons, and holes in an antiferromagnet

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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.date2007-06-11
dc.date.accessioned2026-07-07T09:25:03Z
dc.date.available2026-07-07T09:25:03Z
dc.descriptionWe have constructed a systematic low-energy effective theory for hole- and electron-doped antiferromagnets, where holes reside in momentum space pockets centered at $(\pm\fracπ{2a},\pm\fracπ{2a})$ and where electrons live in pockets centered at $(\fracπ{a},0)$ or $(0,\fracπ{a})$. The effective theory is used to investigate the magnon-mediated binding between two holes or two electrons in an otherwise undoped system. We derive the one-magnon exchange potential from the effective theory and then solve the corresponding two-quasiparticle Schrödinger equation. As a result, we find bound state wave functions that resemble $d_{x^2-y^2}$-like or $d_{xy}$-like symmetry. We also study possible ground states of lightly doped antiferromagnets.
dc.description2 Pages; Proc. of SCES'07, Houston
dc.identifierhttps://arxiv.org/abs/0706.1423
dc.identifierhttp://arxiv.org/abs/0706.1423
dc.identifierPhysica B 403 (2008) 1447
dc.identifierdoi:10.1016/j.physb.2007.10.168
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/156279
dc.subjectStrongly Correlated Electrons
dc.titleSpiral phases and two-particle bound states from a systematic low-energy effective theory for magnons, electrons, and holes in an antiferromagnet
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