Journal article · Preprint article
Field-induced criticality in a gapped quantum magnet with bond disorder
ETH, Solid State Phys Lab, Zurich, Switzerland
Materials Research Division
Support, Niels Bohr Institute, Faculty of Science, Københavns Universitet
Neutron diffraction and calorimetric measurements are used to study the field-induced quantum phase transition in piperazinium-Cu$_2$(Cl$_{1-x}$Br$_x$)$_6$ ($x=0$, x=3.5% and x=7.5%), a prototypical quantum antiferromagnet with random bonds. The critical indexes $\phi$ and $\beta$ are determined. The findings contradict some original predictions for Bose Glass based on the assumption $z=d$, but are consistent with recent theoretical results implying $z
Inelastic neutron experiments reveal that disorder has a profound effect on the lowest-energy magnetic gap excitation in the system.
Language: | English |
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Publisher: | American Physical Society (APS) |
Year: | 2012 |
Pages: | 2 |
ISSN: | 1550235x , 10980121 and 24699950 |
Types: | Journal article and Preprint article |
DOI: | 10.1103/PhysRevB.85.100410 |