Thermodynamic properties of the quantum Heisenberg antiferromagnet on the kagomé lattice.

Thermodynamic properties of the quantum Heisenberg antiferromagnet on the kagomé lattice.
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Kagomé 晶格上的量子海森堡反铁磁体的热力学性质。

DOI:
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发表时间:
1995
期刊:
Physical Review B (Condensed Matter)
影响因子:
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通讯作者:
Seiji Miyashita
Seiji Miyashita
中科院分区:
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文献类型:
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作者:
Tota Nakamura;Seiji Miyashita

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我们在kagom'e晶格上对量子海森堡反铁磁体进行了蒙特卡洛模拟。我们使用了传递矩阵蒙特卡罗方法,这使我们能够在相当低的温度下进行有效的采样,而其他方法则存在严重的符号问题。比热数据呈现双峰。手性和短程自旋相关的结果表明,即使在我们观察到的最低温度下,也没有任何磁有序的趋势。
We have performed Monte Carlo simulations on the quantum Heisenberg antiferromagnet on the kagom'e lattice with up to 72 spins. We have used the transfer-matrix Monte Carlo method, which enabled us to do efficient samplings at rather low temperatures where other methods suffer from serious sign problem. Specific-heat data exhibit the double peak. Results of the chirality and short-range spin correlations show no tendency of any magnetic ordering even at the lowest temperature we observed.