54 research outputs found
Has the evolution of complexity in the amphibian papilla influenced anuran speciation rates?
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/72375/1/j.1420-9101.2006.01079.x.pd
Metamagnetic phase transition in the Ising plus Dzyaloshinskii-Moriya model
We study the 1D ferromagnetic Ising (spin-1/2) model with the
Dzyaloshinskii-Moriya (DM) interaction. We analyze the low energy excitation
spectrum and the ground state magnetic phase diagram using the Lanczos method.
The DM interaction-dependency is calculated for the low-energy excitation
spectrum, spiral order parameter and spin-spin correlation functions. We show
that a metamagnetic quantum phase transition occurs between the ferromagnetic
and spiral phases. The existence of the metamagnetic phase transition is
confirmed, using the variational matrix product states approach.Comment: 5 pages, 6 figure
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