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arXiv 1005.2106cond-mat.str-elcond-mat.mtrl-sci
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电荷序边缘电子的量子临界行为

Quantum critical behavior of electrons at the edge of charge order

Laura Cano-Cortes, Jaime Merino, Simone Fratini

摘要:

我们考虑量子临界点(QCP),其中量子涨落与电荷,而不是磁序诱导非常规的金属性质。基于二维扩展哈伯德模型的有限T计算,我们证明了均匀金属费米液体行为的相干尺度T* 在电荷序开始时是如何消失的。一个强大的有效质量增强让人想起重费米子的行为表明可能的准粒子在QCP的破坏。本文提出了一种在四分之一填充层状有机材料上的实验探针,用于揭示电子在量子临界区的行为。

英文摘要:

We consider quantum critical points (QCP) in which quantum fluctuations associated with charge rather than magnetic order induce unconventional metallic properties. Based on finite-T calculations on a two-dimensional extended Hubbard model we show how the coherence scale T* characteristic of Fermi liquid behavior of the homogeneous metal vanishes at the onset of charge order. A strong effective mass enhancement reminiscent of heavy fermion behavior indicates the possible destruction of quasiparticles at the QCP. Experimental probes on quarter-filled layered organic materials are proposed for unveiling the behavior of electrons across the quantum critical region.

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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