PHASE DIAGRAMS OF THE SPIN-1 BLUME–EMERY–GRIFFITHS MODEL IN A RANDOM TRANSVERSE FIELD
2004 ◽
Vol 18
(31n32)
◽
pp. 4129-4142
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Keyword(s):
The effect of the random quantum transverse field Ω on the tricritical behavior of the spin-1 Blume–Emery–Griffiths (BEG) model is studied using an effective field theory. It is found that the tricritical behavior depends on both the biquadratic interaction K, single-ion anisotropy Δ and the concentration p of the disorder of Ω. Indeed, there exists a special value p1 of the probability p below which the tricritical behavior disappears. In addition, at sufficiently low temperatures, the system exhibits long-range order accompanied by the tricritical behavior below a special value p2 of the probability p.
2018 ◽
Vol 32
(23)
◽
pp. 1850255
◽
Keyword(s):
2017 ◽
Vol 31
(11)
◽
pp. 1750071
◽
Keyword(s):
2015 ◽
Vol 29
(20)
◽
pp. 1550141
◽
2012 ◽
Vol 391
(9)
◽
pp. 2819-2832
◽
Keyword(s):
2016 ◽
Vol 30
(14)
◽
pp. 1650073
◽
Keyword(s):
2012 ◽
Vol 324
(5)
◽
pp. 704-710
◽
2012 ◽
Vol 324
(8)
◽
pp. 1503-1511
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