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cond-mat.str-el2011★ 16 cited
The dimerized ferromagnetic Heisenberg chain
A. Herzog, P. Horsch, A. M. Oles +1
Ferromagnetic, in contrast to antiferromagnetic, Heisenberg chains can undergo a Spin-Peierls dimerization only at finite temperatures. They show reentrant behavior as a function o…
cond-mat.str-el2011★ 41 cited
The J1-J2 Heisenberg model at and close to its z=4 quantum critical point
J. Sirker, V. Y. Krivnov, D. V. Dmitriev +5
We study the frustrated J1-J2 Heisenberg model with ferromagnetic nearest neighbor coupling J1<0 and antiferromagnetic next-nearest neighbor coupling J2>0 at and close to the z=4 q…