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arXiv 1005.4707cond-mat.str-el
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强关联系统基态的自旋非相干行为

Spin-incoherent behavior in the ground state of strongly correlated systems

Adrian E. Feiguin, Gregory A. Fiete

摘要:

人们普遍认为,具有无隙激发的强相互作用一维费米系统可以用Luttinger液体理论有效地描述。然而,当系统的温度与自旋能量相比是高的,但与电荷能量相比是小的时,系统变得“自旋不相干”。我们提出的数值证据表明,一维的“t-J-Kondo”晶格,由一个t-J链与本地化的自旋相互作用,显示所有的特征签名的自旋非相干物理,但在{ \it基态}。我们认为,类似的物理可能存在于广泛的强相互作用系统。

英文摘要:

It is commonly believed that strongly interacting one-dimensional Fermi systems with gapless excitations are effectively described by Luttinger liquid theory. However, when the temperature of the system is high compared to the spin energy, but small compared to the charge energy, the system becomes "spin-incoherent". We present numerical evidence showing that the one-dimensional "t-J-Kondo" lattice, consisting of a t-J chain interacting with localized spins, displays all the characteristic signatures of spin-incoherent physics, but in the {\it ground state}. We argue that similar physics may be present in a wide range of strongly interacting systems.

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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