W
W. A. C. Erkelens
Researcher at Leiden University
Publications - 8
Citations - 498
W. A. C. Erkelens is an academic researcher from Leiden University. The author has contributed to research in topics: Excited state & Neutron scattering. The author has an hindex of 4, co-authored 8 publications receiving 483 citations.
Papers
More filters
Journal ArticleDOI
Presumption for a Quantum Energy Gap in the Quasi-One-Dimensional S?=?1 Heisenberg Antiferromagnet Ni(C2H8N2)2NO2(ClO4)
TL;DR: In this article, magnetic susceptibility and inelastic neutron scattering experiments have been performed in the nearly ideal one-dimensional Heisenberg antiferromagnet with spin one, Ni(C2H8N2)2NO2ClO4.
Journal ArticleDOI
Quantum energy gap in two quasi‐one‐dimensional S=1 Heisenberg antiferromagnets (invited)
J.P. Renard,M. Verdaguer,L. P. Regnault,W. A. C. Erkelens,J. Rossat-Mignod,J. Ribas,W. G. Stirling,C. Vettier +7 more
TL;DR: In this paper, the authors provided an approximate value for the energy gap: EG≂0.4/k ≈−50 K, where J is the intrachain exchange interaction, which is consistent with the Haldane conjecture.
Journal ArticleDOI
Observation of crossover to 4-dimensional critical behaviour
TL;DR: In this paper, the critical behavior of the d-dimensional Ising model in a transverse field H at temperatures near T = 0 and for H → Hc, are predicted to be the same as for a (d + 1)-dimensional ising model with zero field as a function of temperature for T → Tc.
Journal ArticleDOI
Structural studies of the spin-Peierls system TTF(Au)BDT
TL;DR: In this article, the high temperature crystallographic transition of the spin-Peierls system TTF(Au)BDT has been studied by means of X-ray diffraction.