Magnetic and Critical Properties of Alternating Spin Chain withS=1/2, 1in Magnetic Fields
- 15 August 1996
- journal article
- letter
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 65 (8) , 2381-2384
- https://doi.org/10.1143/jpsj.65.2381
Abstract
We study an integrable spin chain with an alternating array of spins S =1/2, 1 in external magnetic fields using the Bethe ansatz exact solution. The calculated magnetization curve has a cusp at a critical magnetic field H = H C , at which the specific heat shows a divergence property. We also calculate finite-size corrections to the energy spectrum, and obtain the critical exponents of correlation functions using conformal field theory (CFT). Low-energy properties of the model are described by two c =1 U (1) CFTs at H < H C and one c =1 U (1) CFT at H > H C .Keywords
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This publication has 12 references indexed in Scilit:
- Thermodynamics of integrable chains with alternating spinsPhysical Review B, 1994
- Heisenberg spin chain with many impuritiesPhysical Review B, 1994
- The effects of a magnetic field in an integrable Heisenberg chain with mixed spinsJournal of Physics A: General Physics, 1993
- Critical behaviour of integrable mixed-spin chainsJournal of Physics A: General Physics, 1993
- New integrable quantum chains combining different kinds of spinsJournal of Physics A: General Physics, 1992
- Decamethylmanganocenium tetracyanoethenide, [Mn(C5Me5)2]⊙⊙⊕ [TCNE]⊙⊖—a molecular ferromagnet with an 8.8 K TcAdvanced Materials, 1991
- Critical exponents for the one-dimensional Hubbard modelPhysical Review B, 1990
- Conformal dimensions in Bethe ansatz solvable modelsJournal of Physics A: General Physics, 1989
- Operator content of two-dimensional conformally invariant theoriesNuclear Physics B, 1986
- Method for calculating finite size corrections in Bethe ansatz systems: Heisenberg chain and six-vertex modelNuclear Physics B, 1985