TY - JOUR
T1 - Quantum ferrimagnets
AU - Chubukov, A. V.
AU - Ivanova, K. I.
AU - Ivanov, P. Ch
AU - Korutcheva, E. R.
PY - 1991
Y1 - 1991
N2 - An instability of a ferromagnetic state in quantum spin systems induced by a two-particle bound-state condensation is shown to produce, for S>2, a ferrimagnetic ground state with a quantized (SZ=S-1) value of spontaneous magnetization per site. For low S, instead, the ground state below the instability has zero net magnetization, while a spontaneous symmetry breaking reveals itself in quadratic, cubic, or both quadratic and cubic correlations for S=1, 2 or 3/2, respectively. The role of quantum fluctuations and the reorientation process in a magnetic field are examined.
AB - An instability of a ferromagnetic state in quantum spin systems induced by a two-particle bound-state condensation is shown to produce, for S>2, a ferrimagnetic ground state with a quantized (SZ=S-1) value of spontaneous magnetization per site. For low S, instead, the ground state below the instability has zero net magnetization, while a spontaneous symmetry breaking reveals itself in quadratic, cubic, or both quadratic and cubic correlations for S=1, 2 or 3/2, respectively. The role of quantum fluctuations and the reorientation process in a magnetic field are examined.
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U2 - 10.1088/0953-8984/3/16/006
DO - 10.1088/0953-8984/3/16/006
M3 - Article
AN - SCOPUS:0542376750
SN - 0953-8984
VL - 3
SP - 2665
EP - 2677
JO - Journal of Physics: Condensed Matter
JF - Journal of Physics: Condensed Matter
IS - 16
M1 - 006
ER -