Abstract
We present the results of an inelastic neutron-scattering study on two bond disordered quasi-two-dimensional quantum magnets (C4H 12N2)Cu2(Cl1-xBrx) 6 with x=0.035 and 0.075. We observe an increase of spin gap, a reduction of magnon bandwidth, and a decrease of magnon lifetimes compared to the x=0 sample. Additional magnon damping is observed at higher energies away from the zone center, which is found to follow the density of single-particle states.
Original language | English |
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Article number | 214408 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 86 |
Issue number | 21 |
DOIs | |
State | Published - Dec 10 2012 |