Bond order wave instabilities in doped frustrated antiferromagnets: 'Valence bond solids' at fractional filling
| Autor: | Martin Indergand, Sylvain Capponi, Andreas M. Läuchli, Manfred Sigrist |
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| Přispěvatelé: | Theoretische Physik, ETH-Hönggerberg, Institut Romand de Recherche Numérique en Physique des Matériaux (IRRMA), Ecole Polytechnique Fédérale de Lausanne (EPFL), Fermions Fortement Corrélés (LPT) (FFC), Laboratoire de Physique Théorique (LPT), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse) |
| Rok vydání: | 2006 |
| Předmět: |
PACS: 71.27.+a
73.22.Gk 71.30.+h 71.35.-y Pyrochlore FOS: Physical sciences 02 engineering and technology engineering.material 01 natural sciences Condensed Matter - Strongly Correlated Electrons Quantum mechanics Lattice (order) 0103 physical sciences Antiferromagnetism 010306 general physics Physics Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Bond strength 021001 nanoscience & nanotechnology Condensed Matter Physics Bond order Electronic Optical and Magnetic Materials [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other] engineering Strongly correlated material Valence bond theory Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Ground state |
| Zdroj: | Physical Review B: Condensed Matter and Materials Physics (1998-2015) Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2006, 74, pp.064429. ⟨10.1103/PhysRevB.74.064429⟩ |
| ISSN: | 1098-0121 1550-235X |
| DOI: | 10.48550/arxiv.cond-mat/0603401 |
| Popis: | We explore both analytically and numerically the properties of doped t-J models on a class of highly frustrated lattices, such as the kagome and the pyrochlore lattice. Focussing on a particular sign of the hopping integral and antiferromagnetic exchange, we find a generic symmetry breaking instability towards a twofold degenerate ground state at a fractional filling below half filling. These states show modulated bond strengths and only break lattice symmetries. They can be seen as a generalization of the well-known valence bond solid states to fractional filling. Comment: slightly shortened and reorganized version |
| Databáze: | OpenAIRE |
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