Abstract
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 be linear in energy dependence near specific wave vectors and that this dependence is expected even after fluctuations of the mean-field values are taken into account. Observation of this unique signature in ARPES will provide very strong evidence of the existence of spinons in more than one dimensions.
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