Scaling of excitations in dimerized and frustrated spin-1/2 chains (Articolo in rivista)

Type
Label
  • Scaling of excitations in dimerized and frustrated spin-1/2 chains (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.72.172409 (literal)
Alternative label
  • Controzzi, D.; Esposti Boschi, C.D.; Ortolani, F.; Pasini, S. (2005)
    Scaling of excitations in dimerized and frustrated spin-1/2 chains
    in Physical review. B, Condensed matter and materials physics; APS, American physical society, College Park, MD (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Controzzi, D.; Esposti Boschi, C.D.; Ortolani, F.; Pasini, S. (literal)
Pagina inizio
  • 172409-1 (literal)
Pagina fine
  • 172409-4 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 72 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 4 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 17 (literal)
Note
  • Google Scholar (literal)
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • International School for Advanced Studies, INFN, Via Beirut, 1, 34100 Trieste, Italy CNR-INFM, Research Unit of Bologna, Viale Berti-Pichat, 6/2, 40127 Bologna, Italy Physics Department, University of Bologna, INFN, Viale Berti-Pichat, 6/2, 40127 Bologna, Italy (literal)
Titolo
  • Scaling of excitations in dimerized and frustrated spin-1/2 chains (literal)
Abstract
  • We study the finite-size behavior of the low-lying excitations of spin-1/2 Heisenberg chains with dimerization and next-to-nearest neighbors interaction J(2). The numerical analysis, performed using density-matrix renormalization group, confirms previous exact diagonalization results and shows that, for different values of the dimerization parameter delta, the elementary triplet and singlet excitations present a clear scaling behavior in a wide range of l=L/xi (where L is the length of the chain and xi is the correlation length). At J(2)=J(2c), where no logarithmic corrections are present, we compare the numerical results with finite-size predictions for the sine-Gordon model obtained using Luscher's theory. For small delta we find a very good agreement for l greater than or similar to 4 or 7 depending on the excitation considered. (literal)
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