Abstract
A possibility of the uniform antiferromagnetic order is pointed out in an S = 1/2 ferromagnetic-antiferromagnetic (F-AF) random alternating Heisenberg quantum spin chain compound: (CH3)2CHNH 3Cu(Clx Br1-x)3. The system exhibits bond alternation of strong random bonds that take ±2J and weak uniform AF bonds of -J. In pure concentration limits, the model reduces to the AF-AF alternation chain at x = 0 and to the F-AF alternation chain at x = 1. By using the nonequilibrium relaxation method of quantum Monte Carlo simulations, it is found that the uniform AF order exhibits critical behaviors in the intermediate concentration region. This explains the experimental observation of the magnetic phase transition. The present results suggest that the uniform AF order survives even in the presence of randomly located ferromagnetic bonds.
| Original language | English |
|---|---|
| Pages (from-to) | 789-792 |
| Number of pages | 4 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 72 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2003 Apr |
| Externally published | Yes |
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Keywords
- Impurity-induced magnetic order
- Nonequilibrium relaxation method
- Random quantum spin chain
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Antiferromagnetic order in an ferromagnetic-antiferromagnetic random alternating quantum spin chain : (CH3)2CHNH 3Cu(Clx Br1-x)3. / Nakamura, Tota.
In: Journal of the Physical Society of Japan, Vol. 72, No. 4, 04.2003, p. 789-792.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Antiferromagnetic order in an ferromagnetic-antiferromagnetic random alternating quantum spin chain
T2 - (CH3)2CHNH 3Cu(Clx Br1-x)3
AU - Nakamura, Tota
PY - 2003/4
Y1 - 2003/4
N2 - A possibility of the uniform antiferromagnetic order is pointed out in an S = 1/2 ferromagnetic-antiferromagnetic (F-AF) random alternating Heisenberg quantum spin chain compound: (CH3)2CHNH 3Cu(Clx Br1-x)3. The system exhibits bond alternation of strong random bonds that take ±2J and weak uniform AF bonds of -J. In pure concentration limits, the model reduces to the AF-AF alternation chain at x = 0 and to the F-AF alternation chain at x = 1. By using the nonequilibrium relaxation method of quantum Monte Carlo simulations, it is found that the uniform AF order exhibits critical behaviors in the intermediate concentration region. This explains the experimental observation of the magnetic phase transition. The present results suggest that the uniform AF order survives even in the presence of randomly located ferromagnetic bonds.
AB - A possibility of the uniform antiferromagnetic order is pointed out in an S = 1/2 ferromagnetic-antiferromagnetic (F-AF) random alternating Heisenberg quantum spin chain compound: (CH3)2CHNH 3Cu(Clx Br1-x)3. The system exhibits bond alternation of strong random bonds that take ±2J and weak uniform AF bonds of -J. In pure concentration limits, the model reduces to the AF-AF alternation chain at x = 0 and to the F-AF alternation chain at x = 1. By using the nonequilibrium relaxation method of quantum Monte Carlo simulations, it is found that the uniform AF order exhibits critical behaviors in the intermediate concentration region. This explains the experimental observation of the magnetic phase transition. The present results suggest that the uniform AF order survives even in the presence of randomly located ferromagnetic bonds.
KW - Impurity-induced magnetic order
KW - Nonequilibrium relaxation method
KW - Random quantum spin chain
UR - http://www.scopus.com/inward/record.url?scp=0037647790&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037647790&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.72.789
DO - 10.1143/JPSJ.72.789
M3 - Article
AN - SCOPUS:0037647790
VL - 72
SP - 789
EP - 792
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 4
ER -