Degenerate manifolds, helimagnets, and multi-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>Q</mml:mi></mml:math> chiral phases in the classical Heisenberg antiferromagnet on the face-centered-cubic lattice
Péter Balla, Yasir Iqbal, Karlo Penc
Abstract
The authors identify triple points and phase boundaries in the classical phase diagram of the Heisenberg model on the face-centered cubic lattice where the Hamiltonian admits a completing of squares thereby giving rise to subextensively degenerate ground state manifolds with a variety of spin structures.
Topics & Concepts
Degenerate energy levelsAntiferromagnetismHeisenberg modelGround statePhase diagramPhysicsHamiltonian (control theory)Lattice (music)Quantum mechanicsCondensed matter physicsMathematical physicsSquare latticeVariety (cybernetics)Phase transitionMathematicsPhase (matter)Fixed pointSpin (aerodynamics)Ising modelLattice model (finance)Advanced Condensed Matter PhysicsPhysics of Superconductivity and MagnetismTheoretical and Computational Physics