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8 papers · 2 filters
Structure of end states for a Haldane Spin Chain
M. Kenzelmann, G. Xu, I. A. Zaliznyak +6
Inelastic neutron scattering was used to probe edge states in a quantum spin liquid. The experiment was performed on finite length antiferromagnetic spin-1 chains in Y_2BaNi_{1-x}M…
Neutron Scattering, Magnetometry, and Quantum Monte Carlo Study of the Randomly-Diluted Spin-1/2 Square-Lattice Heisenberg Antiferromagnet
O. P. Vajk, M. Greven, P. K. Mang +1
We have successfully grown sizable single crystals of La_2Cu_{1-z}(Zn,Mg)_zO_4 with up to nearly half of the magnetic Cu sites replaced by non-magnetic Zn and Mg. Neutron scatterin…
Commensurate spin dynamics in the superconducting state of an electron-doped cuprate superconductor
K. Yamada, K. Kurahashi, T. Uefuji +4
We report neutron scattering studies on single crystals of the electron-doped (n-type) superconducting cuprate Nd2-xCexCuO4 (x=0.15) with Tc = 18 K and 25 K. Unlike the hole-doped…
Effect of a magnetic field on long-range magnetic order in stage-4 and stage-6 superconducting La2CuO(4+y)
B. Khaykovich, R. J. Birgeneau, F. C. Chou +7
We have measured the enhancement of the static incommensurate spin-density wave (SDW) order by an applied magnetic field in stage-4 and stage-6 samples of superconducting La2CuO(4+…
Emergent excitations in a geometrically frustrated magnet
S. -H. Lee, C. Broholm, W. Ratcliff +4
Frustrated systems are ubiquitous and interesting because their behavior is difficult to predict. Magnetism offers extreme examples in the form of spin lattices where all interacti…
A neutron scattering study of two-magnon states in the quantum magnet copper nitrate
D. A. Tennant, C. Broholm, D. H. Reich +7
We report measurements of the two-magnon states in a dimerized antiferromagnetic chain material, copper nitrate (Cu(NO3)2*2.5D2O). Using inelastic neutron scattering we have measur…