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Exactly solved mixed spin-(1,1/2) Ising–Heisenberg distorted diamond chain

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  • Lisnyi, Bohdan
  • Strečka, Jozef

Abstract

The mixed spin-(1,1/2) Ising–Heisenberg model on a distorted diamond chain with the spin-1 nodal atoms and the spin-1/2 interstitial atoms is exactly solved by the transfer-matrix method. An influence of the geometric spin frustration and the parallelogram distortion on the ground state, magnetization, susceptibility and specific heat of the mixed-spin Ising–Heisenberg distorted diamond chain are investigated in detail. It is demonstrated that the zero-temperature magnetization curve may involve intermediate plateaus just at zero and one-half of the saturation magnetization. The temperature dependence of the specific heat may have up to three distinct peaks at zero magnetic field and up to four distinct peaks at a non-zero magnetic field. The origin of multipeak thermal behavior of the specific heat is comprehensively studied.

Suggested Citation

  • Lisnyi, Bohdan & Strečka, Jozef, 2016. "Exactly solved mixed spin-(1,1/2) Ising–Heisenberg distorted diamond chain," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 462(C), pages 104-116.
    • Handle: RePEc:eee:phsmap:v:462:y:2016:i:c:p:104-116
    DOI: 10.1016/j.physa.2016.06.088
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