Dynamics in a two-leg spin ladder with a four-spin cyclic interaction
نویسندگان
چکیده
منابع مشابه
Magnetic Phase Diagram of Spin-1/2 Two-Leg Ladder with Four-Spin Ring Exchange
We study the spin-1/2 two-leg Heisenberg ladder with four-spin ring exchanges under a magnetic field. We introduce an exact duality transformation which is an extension of the spin-chirality duality developed previously and yields a new self-dual surface in the parameter space. We then determine the magnetic phase diagram using the numerical approaches of the density-matrix renormalization-grou...
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We investigate an S = 1/2 two-leg spin ladder with a cyclic four-spin exchange interaction whose interaction constant is denoted by J4, by using the density matrix renormalization group method. The interchain and the intrachain interaction constant are denoted by Jrung and Jleg, respectively and assumed to be antiferromagnetic. It turns out that a spin gap between the singlet (S tot = 0) and th...
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Inelastic neutron scattering is used to measure the spin excitation spectrum of the Heisenberg S=1/2 ladder material (C7H10N)2CuBr4 in its entirety, both in the gapped spin liquid and the magnetic field-induced Tomonaga-Luttinger spin liquid regimes. A fundamental change of the spin dynamics is observed between these two regimes. Density matrix renormalization group calculations quantitatively ...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2009
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.79.113106