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Sheng, J.*; Wang, L.*; Candini, A.*; Jiang, W.*; Huang, L.*; Xi, B.*; Zhao, J.*; Ge, H.*; Zhao, N.*; Fu, Y.*; et al.
Proceedings of the National Academy of Sciences of the United States of America, 119(51), p.e2211193119_1 - e2211193119_9, 2022/12
被引用回数:4 パーセンタイル:56.47(Multidisciplinary Sciences)Although considerable progress has been made in the theoretical understanding of the low-dimensional frustrated quantum magnets, experimental realizations of a well-established scaling analysis are still scarce. This is particularly true for the two-dimensional antiferromagnetic triangular lattices. Owing to the small exchange strength, the newly discovered compound NaBaCo(PO) provides a rare opportunity for clarifying the quantum criticality in an ideal triangular lattice with quantum spin S=1/2. In addition to the establishment of the complete phase diagrams, the spin Hamiltonian with a negligible interplane interaction has been determined through the spin wave dispersion in the polarized state, which is consistent with the observation of a two-dimensional quantum critical point with the Bose-Einstein condensation of diluted free bosons.
藤原 理賀
no journal, ,
近年、カムチャツカ半島の火山地帯で多くの新しい銅鉱物が発見されている。講演者は、これらの新しい銅鉱物から幾何学的フラストレーションを持つ低次元量子磁性体を複数発見し、人工的に合成し、そのスピン状態を調べてきた。本講演では、スピンが作り出す動的・静的内部磁場を高感度で検出できるSR法が、これらの人工銅鉱物のスピン状態の調査に果たす役割について紹介する。また、中性子散乱実験との相補的利用の重要性についても議論する。