Properties of the first excited state of nonbipartite Heisenberg spin rings

Autor(en): Schnack, J 
Stichwörter: CHAINS; CLUSTERS; CONVERGENCE; CRITICAL-BEHAVIOR; DYNAMICS; ENERGY-LEVELS; HALDANE-GAP; LATTICE; MAGNETIC-ANISOTROPY; Materials Science; Materials Science, Multidisciplinary; Physics; Physics, Applied; Physics, Condensed Matter; QUANTUM
Erscheinungsdatum: 2000
Herausgeber: AMER PHYSICAL SOC
Journal: PHYSICAL REVIEW B
Volumen: 62
Ausgabe: 22
Startseite: 14855
Seitenende: 14859
Zusammenfassung: 
Systematic properties of the first excited state are presented for various ring sizes and spin quantum numbers which are only partly covered by the theorem of Lieb, Schultz, and Mattis. For odd ring sizes the first excited energy eigenvalue shows unexpected degeneracy and related shift quantum numbers. As a byproduct the ground state energy as well as the energy of the first excited state of infinite chains are calculated by extrapolating the properties or only a few, finite, antiferromagnetically coupled Heisenberg rings using the powerful Levin sequence acceleration method.
ISSN: 24699950
DOI: 10.1103/PhysRevB.62.14855

Show full item record

Google ScholarTM

Check

Altmetric