What is Minimal Model of3He Adsorbed on Graphite? –Importance of Density Fluctuations in 4/7 Registered Solid–

2007/09/30 by Shinji Watanabe, Masatoshi Imada · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #cond-mat.str-el

paper · pdf · doi:10.1143/jpsj.76.113603

published as J. Phys. Soc. Jpn. 76 (2007) 113603 · 9 pages, 5 figures

arxiv created 2007/11/12 · openalex publication_date 2007/11/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We show theoretically that the second layer of 3He adsorbed on graphite and solidified at 4/7 of the first-layer density is close to the fluid-solid boundary with substantial density fluctuations on the third layer. The solid shows a translational symmetry breaking as in charge-ordered insulators of electronic systems. We construct a minimal model beyond the multiple-exchange Heisenberg model. An unexpectedly large magnetic field required for the measured saturation of magnetization is well explained by the density fluctuations. The emergence of quantum spin liquid is understood from the same mechanism as in the Hubbard model and in κ-(ET)₂Cu₂(CN)₃ near the Mott transitions.

Citations

• On the ground state properties of the anisotropic triangular antiferromagnet
• Gapless quantum spin liquid, stripe, and antiferromagnetic phases in frustrated Hubbard models in two dimensions
• Quantum Phase Transitions to Charge-Ordered and Wigner-Crystal States under the Interplay of Lattice Commensurability and Long-Range Coulomb Interactions
• Exact Diagonalization Study of Mott Transition in the Hubbard Model on an Anisotropic Triangular Lattice
• Nonmagnetic Insulating States near the Mott Transitions on Lattices with Geometrical Frustration and Implications for κ-(ET)2Cu2(CN)3

Cited by

• On Proximity of 4/7 Solid Phase of 3He Adsorbed on Graphite –Origin of Specific-Heat Anomalies in Hole-Doped Density-Ordered Solid–