RT Journal Article
T1 Antiferromagnetic four-dimensional O(4) model
A1 Campos, Isabel
A1 Fernández Pérez, Luis Antonio
A1 Tarancón, Alfonso
AB We study the phase diagram of the four-dimensional O(4) model with first- (β_(1)) and second- (β2) neighbor couplings, especially in the β_(2) < 0 region, where we find a line of transitions which seems to be second order. We also compute the critical exponents on this line at the point β_(1) = 0 (F_(4) lattice) by finite-size scaling techniques up to a lattice size of 24, these exponents being different from the mean-field ones.
PB Amer Physical Soc
SN 1550-7998
YR 1997
FD 1997-03-01
LK https://hdl.handle.net/20.500.14352/60089
UL https://hdl.handle.net/20.500.14352/60089
LA eng
NO © 1997 The American Physical Society. The authors are grateful to J. L. Alonso, H. G. Ballesteros, V. Martín-Mayor, J. J. Ruiz-Lorenzo, C. L. Ullod, and D. Íñiguez for helpful discussions and comments. We thank especially J. M. Carmona for useful discussions concerning the logarithmic corrections. One of us (I.C.) wishes to thank R. D. Kenway for this kind hospitality at the Department of Physics and Astronomy, University of Edinburgh, as well as to Edinburgh Parallel Computing Center (EPCC) for computing facilities where part of these computations have been done under the financial support of TRACS-EC program. This work was partially supported by CICyT AEN95-1284, and AEN96-1670. I.C. thanks the Ministerio de Educación y Ciencia for financial support.
NO Edinburgh Parallel Computing Center (EPCC)
NO CICyT (Spain)
NO Ministerio de Educación y Ciencia, Spain
DS Docta Complutense
RD 10 abr 2025