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5 papers · 2 filters
Nature of the Quantum Phase Transition in Quantum Compass Model
Han-Dong Chen, Chen Fang, Jiangping Hu +1
In this work, we show that the quantum compass model on an square lattice can be mapped to a fermionic model with local density interaction. We introduce a mean-field approximation…
Spin-wave dispersion in half-doped LaSrNiO
D. X. Yao, E. W. Carlson
Recent neutron scattering measurements reveal spin and charge ordering in the half-doped nickelate, La Sr NiO. Many of the features of the magnetic excitations…
Photoemission study of (VM)O (M=Cr, Ti)
S. -K. Mo, H. -D. Kim, J. D. Denlinger +8
We present high-resolution bulk-sensitive photoemission spectra of (VM)O (M=Cr, Ti). The measurements were made for the paramagnetic metal (PM), paramagnetic in…
A Magnetic Model of the Tetragonal-Orthorhombic Transition in the Cuprates
Fang Chen, Jiangping Hu, Steven Kivelson +1
It is shown that a quasi two dimensional (layered) Heisenberg antiferromagnet with fully frustrated interplane couplings ({\it e.g.} on a body-centered tetragonal lattice) generica…
Investigation of the presence of charge order in magnetite by measurement of the spin wave spectrum
R. J. McQueeney, M. Yethiraj, W. Montfrooij +3
Inelastic neutron scattering results on magnetite (Fe3O4) show a large splitting in the acoustic spin wave branch, producing a 7 meV gap midway to the Brillouin zone boundary at q…