Antiferromagnetically Ordered State in the Half-Filled Hubbard Model on the Socolar Dodecagonal Tiling
Akihisa Koga
Abstract
We investigate the antiferromagnetically ordered state in the half-filled Hubbard model on the Socolar dodecagonal tiling. When the interaction is introduced, the staggered magnetizations suddenly appear, which results from the existence of the macroscopically degenerate states in the tightbinding model. The increase of the interaction strength monotonically increases the magnetizations although its magnitude depends on the local environments. Magnetization profile is discussed in the perpendicular space. The similarity and difference are also addressed in magnetic properties in the Hubbard model on the Penrose, Ammann-Beenker, and Socolar dodecagonal tilings.
Topics & Concepts
Condensed matter physicsHubbard modelDegenerate energy levelsMagnetizationPhysicsAntiferromagnetismPairingQuantum mechanicsMagnetic fieldSuperconductivityQuasicrystal Structures and PropertiesTheoretical and Computational PhysicsMagnetic properties of thin films