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Spectroscopic fingerprints of the frustrated magnetic order in Li2VOSiO4: a t-J model study

I. J. Hamad·A. E. Trumper·L. O. Manuel
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Abstract

We have analyzed theoretically the photoemission spectra of the insulating compound Li2VOSiO4.Recently, this compound has been proposed as the first experimental realization of the frustrated J1-J2 Heisenberg model. Although it is well known that Li2VOSiO4 is magnetically ordered in a collinear arrangement below TN=2.8 K, there is some controversy about the coexistence of two collinear phases above TN. Using a generalized t-J model we have obtained a complex spectral structure that can be traced back to the underlying collinear magnetic structures. We discuss the possibility to use ARPES experiments as a way to discern among the different scenarios proposed in the literature.

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I. J. Hamad, A. E. Trumper, L. O. Manuel. 2007-03-08. Spectroscopic fingerprints of the frustrated magnetic order in Li2VOSiO4: a t-J model study. https://doi.org/10.1016/j.physb.2007.04.051

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