Quantum Frustration in the “Spin Liquid” Phase of Two-Dimensional H3e

作者：Eddy Collin, S. Triqueneaux, R. Harakály, M. Röger, Christopher Bäuerle, Yu. M. Bunkov, Henri Godfrin · 发表于：Physical Review Letters · 年份：2001 · DOI：10.1103/physrevlett.86.2447 · 被引用次数：47 · 研究领域：Physics of Superconductivity and Magnetism、Advanced Condensed Matter Physics、Quantum, superfluid, helium dynamics

We have measured the ultralow temperature and low field magnetic susceptibility of the 4/7 phase of two-dimensional 3He adsorbed on graphite preplated by one layer of 4He. The experiments are performed by progressively adding 4He to the system, thus suppressing in a controlled way the 3He atoms trapped in substrate heterogeneities. This procedure enables us to determine the intrinsic properties of this spin 1/2 model magnet in the zero field limit. The results show quantitatively that the system is strongly frustrated by multiple spin exchange interactions. A characteristic gapped spin liquid behavior is observed at ultralow temperature.