Evolution of the single-hole spectral function across a quantum phase transition in the anisotropic-triangular-lattice antiferromagnet

Abstract

We study the evolution of the single-hole spectral function when the ground state of the anisotropic-triangular-lattice antiferromagnet changes from the incommensurate magnetically-ordered phase to the spin-liquid state. In order to describe both of the ground states on equal footing, we use the large-N approach where the transition between these two phases can be obtained by controlling the quantum fluctuations via an 'effective' spin magnitude. Adding a hole into these ground states is described by a t-J type model in the slave-fermion representation. Implications of our results to possible future ARPES experiments on insulating frustrated magnets, especially Cs${}_2$CuCl${}_4$, are discussed.

8 pages, 7 figures

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Cited by in corpus (3)

• Ordering in Cs2CuCl4: Is there a proximate spin liquid?
• Spin Structure Factor of the Frustrated Quantum Magnet Cs_2CuCl_4
• Effects of semiclassical spiral fluctuations on hole dynamics