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Condensed Matter > Strongly Correlated Electrons

arXiv:1812.11301 (cond-mat)
[Submitted on 29 Dec 2018]

Title:Investigation of Thermodynamic Properties of Cu(NH3)4SO4.H2O, a Heisenberg Spin Chain Compound

Authors:Tanmoy Chakraborty, Harkirat Singh, Dipanjan Chaudhuri, Hirale S. Jeevan, Philipp Gegenwart, Chiranjib Mitra
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Abstract:Detailed experimental investigations of thermal and magnetic properties are presented for Cu(NH3)4SO4.H2O, an ideal uniform Heisenberg spin half chain compound. A comparison of these properties with relevant spin models is also presented. The temperature dependent magnetic susceptibility and specific heat data has been compared with the exact solution for uniform Heisenberg chain model derived by means of Bethe ansatz technique. Field dependent isothermal magnetization curves are simulated by Quantum Monte Carlo technique and compared with the corresponding experimental ones. Specific heat as a function of magnetic field (up to 7T) and temperature (down to 2K) is reported. Subsequently, the data are compared with the corresponding theoretical curves for the infinite Heisenberg spin half chain model with J=6K. Moreover, internal energy and entropy are calculated by analyzing the experimental specific heat data. Magnetic field and temperature dependent behavior of entropy and internal energy are in good agreement with the theoretical predictions.
Subjects: Strongly Correlated Electrons (cond-mat.str-el); Materials Science (cond-mat.mtrl-sci); Statistical Mechanics (cond-mat.stat-mech); Quantum Physics (quant-ph)
Cite as: arXiv:1812.11301 [cond-mat.str-el]
  (or arXiv:1812.11301v1 [cond-mat.str-el] for this version)
  https://doi.org/10.48550/arXiv.1812.11301
Journal reference: J. Magn. Magn. Mater. 439, 101-106 (2017)
Related DOI: https://doi.org/10.1016/j.jmmm.2017.05.020

Submission history

From: Tanmoy Chakraborty [view email]
[v1] Sat, 29 Dec 2018 07:00:50 UTC (598 KB)
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