Low-Temperature Thermodynamics of Spin-1/2 Orthogonal-Dimer Chain with Ising and Heisenberg Interactions

• Authors: T. Verkholyak , J. Strečka
• Languages of publication: EN

Abstracts

EN

We consider an exactly solvable version of the quantum spin-1/2 orthogonal-dimer chain with the Heisenberg intra-dimer and Ising inter-dimer couplings. The investigated quantum spin system exhibits at zero temperature fractional plateaux at 1/4 and 1/2 of the saturation magnetization and it has a highly degenerate ground state at critical fields where the magnetization jumps. We study the field dependence of the specific heat at low temperature. The lattice-gas description is formulated in a vicinity of critical fields to explain the low-temperature behaviour of specific heat.

Keywords

EN

75.10.Jm; 75.10.Pq; 75.30.Gw; 75.40.Cx

Discipline

• 75.30.Gw: Magnetic anisotropy
• 75.10.Pq: Spin chain models
• 75.40.Cx: Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)
• 75.10.Jm: Quantized spin models, including quantum spin frustration

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 1
• Pages: 22-23

Dates

published

2014-07

Contributors

author

T. Verkholyak

• Institute for Condensed Matter Physics, NAS of Ukraine, 1 Svientsitskii Street, 79011 L'viv, Ukraine
• Institute of Physics, Faculty of Sciences, P. J. Safarik University, Park Angelinum 9, 041 54 Košice, Slovakia

author

J. Strečka

• Institute of Physics, Faculty of Sciences, P. J. Safarik University, Park Angelinum 9, 041 54 Košice, Slovakia

References

• [1] N.B. Ivanov, J. Richter, Phys. Lett. A 232, 308 (1997), doi: 10.1016/S0375-9601(97)00374-5
• [1a] J. Richter, N.B. Ivanov, and J. Schulenburg, J. Phys.: Condens. Matter 10, 3635 (1998), doi: 10.1088/0953-8984/10/16/015
• [2] M. Takigawa and F. Mila, Magnetization Plateaus, In: Introduction to Frustrated Magnetism C. Lacroix, Ph. Mendels, F. Mila (eds.), Springer series in Solid-state Science 164, Springer-Verlag Berlin Heidelberg (2011), p.241, doi: 10.1007/978-3-642-10589-0_10
• [3] H.G. Paulinelli, S. de Souza, O. Rojas, J. Phys.: Condens. Matter 25, 306003 (2013), doi: 10.1088/0953-8984/25/30/306003
• [4] T. Verkholyak, J. Strečka, Phys. Rev. B 88, 134419 (2013), doi: 10.1103/PhysRevB.88.134419
• [5] R.J. Baxter, Exactly Solved Models in Statistical Mechanics Academic, New York, 1982
• [6] M.E. Zhitomirsky, A. Honecker, J. Stat. Mech.: Theor. Exp. P07012 (2004), doi: 10.1088/1742-5468/2004/07/P07012
• [7] O. Derzhko, J. Richter, Eur. Phys. J. B 52, 23 (2006), doi: 10.1140/epjb/e2006-00273-y

Identifiers

DOI

10.12693/APhysPolA.126.22