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

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.

arXiv comment7 pages, 2 figures. To be published in Physica B

References in corpus (7)

• Li${}_2$VO(Si,Ge)O${}_4$, a prototype of a two-dimensional frustrated quantum Heisenberg antiferromagnet
• Magnetic and thermodynamic properties of Li(2)VOSiO(4): a two-dimensional S=1/2 frustrated antiferromagnet on a square lattice
• Realization of a large J_2 quasi-2D spin-half Heisenberg system: Li2VOSiO4
• Peierls-like transition induced by frustration in a two-dimensional antiferromagnet
• A closer look at symmetry breaking in the collinear phase of the $J_1-J_2$ Heisenberg Model
• Very low-frequency excitations in frustrated two-dimensional $S=1/2$ Heisenberg antiferromagnets
• Quasiparticle vanishing driven by geometrical frustration

Cited by in corpus (3)

• Generalized one-band model based on Zhang-Rice singlets for Tetragonal CuO
• Spin polaron in the J1-J2 Heisenberg model
• Magnon dispersion and Single hole motion in 2D frustrated antiferromagnets with four-sublattice structures