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arXiv 1210.7819cond-mat.str-el
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Dirac自旋对Herbertsmithe的ARPES签名的影响

Effect of Dirac Spinons on ARPES signatures of Herbertsmithe

Sumiran Pujari, Michael Lawler

摘要:

自旋子仍然是受抑反铁磁体的一种难以捉摸的基本激发。为了巩固其存在的证据,我们解决的问题是什么将是角分辨光电子能谱(ARPES)签名的Herbertsmithite单晶样品假设它是由狄拉克自旋液体状态。特别是,我们表明,电子谱函数将有一个线性的能量依赖性附近的特定波矢量,这种依赖性预计即使在波动的平均场值被考虑在内。在ARPES中观察到这种独特的签名将为大于一维的自旋子的存在提供非常有力的证据。

英文摘要:

The spinon continues to be an elusive elementary excitation of frustrated antiferromagnets. To solidify evidence for its existence, we address the question of what will be the Angle Resolved Photoemission Spectroscopy (ARPES) signatures of single crystal samples of Herbertsmithite assuming it is described by the Dirac spin liquid state. In particular, we show that the electron spectral function will have a linear in energy dependence near specific wave vectors and that this dependence is expected even after fluctuations to the mean field values are taken into account. Observation of this unique signature in ARPES will provide very strong evidence for the existence of spinons in greater than one dimension.

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