@article{oai:repo.qst.go.jp:00049603,
 author = {Nakano, H. and Sakai, T. and Sakai, Toru},
 issue = {10},
 journal = {Juornal of the Physical Society of Japan},
 month = {Sep},
 note = {The Haldane gap of the S = 2 Heisenberg antiferromagnet in a one-dimensional linear chain is examined by a numerical-diagonalization method. A precise estimate for the magnitude of the gap is successfully obtained by a multistep convergence-acceleration procedure applied to finite-size diagonalization data under the twisted boundary condition.},
 pages = {105002-1--105002-2},
 title = {Precise Estimation of the S = 2 Haldane Gap by Numerical Diagonalization},
 volume = {87},
 year = {2018}
}