 Geometrical description of the state space in spin crossover solids with high-spin low-spin degree of freedomRıza Erdem Physica A: Statistical Mechanics and its Applications, 2022, vol. 598, issue C Abstract: Ising-like model of the spin-crossover solids is studied making use of thermodynamic geometry in the Ruppeiner formalism. A thermal metric tensor (Gij) and corresponding thermodynamic curvature or Ricci scalar (R) are computed for a 2D “magnatization” vs “temperature” state space. The two metric components, namely G12 and G22, have the finite extremum above the critical temperature in the high-spin state. On the other hand, R abruptly jumps between the R>0 and R<0 regions along the first-order high-spin/low-spin transition line while the curvature jump disappears when the critical point (C) is reached. It exhibits smooth changes beyond C along the R=0 line. A different vanishing curvature line with R=0 is also observed in the high-spin state regime in the geometric phase diagram. Keywords: Spin crossover transition; Thermodynamic geometry; Ricci scalar (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:598:y:2022:i:c:s0378437122002667 DOI: 10.1016/j.physa.2022.127335 Access Statistics for this article Physica A: Statistical Mechanics and its Applications is currently edited by K. A. Dawson, J. O. Indekeu, H.E. Stanley and C. Tsallis More articles in Physica A: Statistical Mechanics and its Applications from Elsevier |
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