Neutron scattering evidence for isolated spin-1/2 ladders in (C5D12N)2CuBr4

Show full item record

Title: Neutron scattering evidence for isolated spin-1/2 ladders in (C5D12N)2CuBr4
Author: Nagler, S.E.; Pajerowski, D.M.; Meisel, M.W.; Broholm, C.; Schmidt, K.P.; Talham, D.R.; Brown, C.M.; Uhrig, G.S.; Savici, A.T.; Granroth, G.E.
Abstract: Inelastic neutron scattering was used to determine the spin Hamiltonian for the singlet ground-state system of fully deuterated BPCB, (C5D12N)2CuBr4. A two-leg spin-1/2 ladder model, with J⊥=(1.09±0.01) meV and J∥=(0.296±0.005) meV, accurately describes the data. The experimental limit on the effective interladder exchange constant is |Jinteff|≤0.006 meV, and the limit on total diagonal, intraladder exchange is |JF+JF'|≤0.1 meV. Including the effects of copper to bromide covalent spin transfer on the magnetic form factor, the experimental ratios of intraladder bond energies are consistent with the predictions of continuous unitary transformation.
URI: http://jhir.library.jhu.edu/handle/1774.2/33746
Date: 2009-09-01
Citation: Physical Review B (Condensed Matter and Materials Physics) 1 Sept. 2009, vol.80, no.9, 094411 (8 pp.
Subject: antiferromagnetic materials
exchange interactions (electron)
magnetic form factor
continuous unitary transformation
covalent spin transfer
spin dynamics
intra-ladder bond energies
spin Hamiltonian
singlet ground state system
inelastic neutron scattering

Files in this item

Files Size Format Download
Broholm Neutron scattering 2009.pdf 1.247Mb application/pdf Download

The following license files are associated with this item:

This item appears in the following Collection(s)

Show full item record