Magnetization plateau in the spin ladder with a four-spin exchange
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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G. Finocchio,1 I. N. Krivorotov,2 L. Torres,3 R. A. Buhrman,4 D. C. Ralph,4 and B. Azzerboni1 1Dipartimento di Fisica della Materia e Tecnologie Fisiche Avanzate, University of Messina, Salita Sperone 31, 98166 Messina, Italy 2Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA 3Departamento de Fisica Aplicada, Universidad de Salamanca, Plaza de la ...
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Schön et al. (1) claimed to have shown that a two-dimensional structure is not needed to support cuprate superconductivity. Based on the references for the structure of the film provided in their article, however, we believe that this conclusion is premature. In their report on the field-effect-induced modulation of transport properties in thin films of the spin-ladder compound [CaCu2O3]4, Schö...
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We study theoretically the lattice instability in the spin gap systems under magnetic eld. With the magnetic eld larger than a critical value h c1 , the spin gap is collapsed and the magnetization arises. We found that the lattice distortion occurs in the spin-ladder at an incommensurate wavevector corresponding to the magnetization, while it does not occur in the Haldane system. At low tempera...
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In this paper we study the concurrence and the block-block entanglement in the S = 1/2 spin ladder with four-spin ring exchange by the exact diagonalization method of finite cluster of spins. The relationship between the global phase diagram and the ground-state entanglement is investigated. It is shown that the block-block entanglement of different block size and geometry manifests richer info...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1999
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.60.48