Finite-Temperature Néel Ordering of Fluctuations in a Plaquette Orbital Model

Abstract

We present a pseudospin model which should be experimentally accessible using solid-state devices and, being a variation on the compass model, adds to the toolbox for the protection of qubits in the area of quantum information. Using Monte Carlo methods, we find for both classical and quantum spins in two and three dimensions Ising-type Neel ordering of energy fluctuations at finite temperatures without magnetic order. We also readdress the controversy concerning the stability of the ordered state in the presence of quenched impurities and present numerical results which are at clear variance with earlier claims in the literature.

arXiv comment4 pages, 5 figures, revised and extended version

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Cited by in corpus (8)

• Re-examining the directional-ordering transition in the compass model with screw-periodic boundary conditions
• The quantum compass chain in a transverse magnetic field
• Order by disorder and phase transitions in a highly frustrated spin model on the triangular lattice
• Spin, orbital and topological order in models of strongly correlated electrons
• Locally tunable disorder and entanglement in the one-dimensional plaquette orbital model
• Correlation inequalities for classical and quantum XY models
• True nature of long-range order in a plaquette orbital model
• One-dimensional frustrated plaquette compass model: Nematic phase and spontaneous multimerization