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A005402 High temperature series for spin-1/2 Heisenberg specific heat on 2D square lattice.

%I A005402 M4100 #29 Nov 25 2024 12:15:36
%S A005402 0,6,-12,-84,1200,3120,-249312,920928,86274816,-1232035584,
%T A005402 -40970012160,1391730516480,20983074318336,-1798371774277632,
%U A005402 -1850681724997632,2713439169345073152,-40045819902128750592,-4625352042615223025664,171173842584165886328832,8223835353617664214695936
%N A005402 High temperature series for spin-1/2 Heisenberg specific heat on 2D square lattice.
%D A005402 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A005402 G. A. Baker Jr., H. E. Gilbert, J. Eve and G. S. Rushbrooke, <a href="https://doi.org/10.1016/0375-9601(67)90860-2">On the two-dimensional, spin-1/2 Heisenberg ferromagnetic models</a>, Phys. Lett., 25A (1967), 207-209.
%H A005402 J. Oitmaa and E. Bornilla, <a href="https://doi.org/10.1103/PhysRevB.53.14228">High-temperature-series study of the spin-1/2 Heisenberg ferromagnet</a>, Phys. Rev. B, 53 (1996), 14228. See Table I and the note added in proof.
%H A005402 Laurent Pierre, Bernard Bernu and Laura Messio, <a href="https://doi.org/10.21468/SciPostPhys.17.4.105">High temperature series expansions of S = 1/2 Heisenberg spin models: Algorithm to include the magnetic field with optimized complexity</a>, SciPost Phys. 17, 105 (2024); arXiv:<a href="https://arxiv.org/abs/2404.02271">2404.02271</a> [cond-mat.str-el], 2024. See the supporting file <a href="https://bitbucket.org/lmessio/htse-coefficients/src/main/Square/Square_20_0.py">Square_20_0.py</a>.
%H A005402 <a href="/index/Sp#specific_heat">Index entries for sequences related to specific heat</a>
%Y A005402 Cf. A005400 (hexagonal), A002169 (cubic); A005401 (susceptibility).
%K A005402 sign
%O A005402 1,2
%A A005402 _N. J. A. Sloane_
%E A005402 Better description from _Steven Finch_
%E A005402 a(11)-a(14) added from Oitmaa and Bornilla by _Andrey Zabolotskiy_, Oct 20 2021 and Feb 05 2022
%E A005402 Terms a(15) and beyond from Pierre, Bernu & Messio added by _Andrey Zabolotskiy_, Nov 18 2024