STUDY ON REGULAR DILUTIONS OF $S=\frac{1}{2}$ IMPURITY IN S=1 CHAINS BY QUANTUM MONTE CARLO SIMULATIONS

2003 ◽  
Vol 17 (31n32) ◽  
pp. 5951-5959 ◽  
Author(s):  
HUAWEN WANG ◽  
ZHAOXIN XU ◽  
HEPING YING ◽  
JUN ZHANG

We investigate the variant regularly diluted situations of [Formula: see text] in S=1 isotropic antiferromagnetic chains by the quantum Monte Carlo loop cluster algorithm. Our results manifest significant different magnetic properties in the ground state with respect to the odd (even) host S=1 spins in one unit cell with an impurity S=1/2, and the doped system gradually transits to the pure Haldane chain in two different tendencies with the decreasing of the impurity concentrations.

2007 ◽  
Vol 22 (07n10) ◽  
pp. 741-748
Author(s):  
Peng Zhang ◽  
Zhaoxin Xu ◽  
Heping Ying ◽  
Jianhui Dai ◽  
Peter Crompton

The S =1/2 Heisenberg chain with bond alternation and randomness of antiferromagnetic (AFM) and ferromagnetic (FM) interactions is investigated by quantum Monte Carlo simulations of loop/cluster algorithm. Our results have shown interesting finite temperature magnetic properties of this model. The relevance of our study to former investigation results is discussed.


2004 ◽  
Vol 281 (2-3) ◽  
pp. 240-246 ◽  
Author(s):  
H.Q. Lin ◽  
H.Y. Shik ◽  
Y.Q. Wang ◽  
C.D. Batista ◽  
J.E. Gubernatis

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Wei-Peng Chen ◽  
Jared Singleton ◽  
Lei Qin ◽  
Agustín Camón ◽  
Larry Engelhardt ◽  
...  

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