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arXiv 0707.1840cond-mat.mes-hallcond-mat.str-el
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v=2/3分数阶量子Hall系统中畴的形成

Domain Formation in v=2/3 Fractional Quantum Hall Systems

Naokazu Shibata, Kentaro Nomura

摘要:

基于密度矩阵重整化群(DMRG)分析,研究了v=2/3分数量子霍尔系统中畴的形成.计算了不同自旋极化下的基态能量和对关联函数。结果证实了在部分自旋极化态下的磁畴形成,但畴壁的存在增加了部分自旋极化态的能量,并且基态是自旋非极化态还是完全自旋极化态取决于塞曼能量.我们预期与外部自由度如核自旋的耦合对于降低部分自旋极化态的能量是重要的。

英文摘要:

We study the domain formation in the v=2/3 fractional quantum Hall systems basing on the density matrix renormalization group (DMRG) analysis. The ground-state energy and the pair correlation functions are calculated for various spin polarizations. The results confirm the domain formation in partially spin polarized states, but the presence of the domain wall increases the energy of partially spin polarized states and the ground state is either spin unpolarized state or fully spin polarized state depending on the Zeeman energy. We expect coupling with external degrees of freedom such as nuclear spins is important to reduce the energy of partially spin polarized state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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