Intramolecular Fragmentation of Magnetic Moments Near Quantum Spin Liquid

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Other Title
  • 量子スピン液体相近傍での磁気モーメントの分子内分裂
  • 最近の研究から 量子スピン液体相近傍での磁気モーメントの分子内分裂
  • サイキン ノ ケンキュウ カラ リョウシ スピン エキタイソウ キンボウ デ ノ ジキ モーメント ノ ブンシ ナイ ブンレツ

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Abstract

<p>Magnetic structures of molecular Mott insulators X[Pd (dmit)2 ]2( X=Me4P, Me4Sb), of which electronic states are located near quantum spin liquid, are demonstrated by 13C NMR. Antiferromagnetic spectra show two distinct magnetic moments within each Pd (dmit)2 molecule, which cannot be described by single band dimer-Mott model and requires intramolecular electronic correlation. This unconventional fragmentation of S=1/ 2 electron spin with strong quantum fluctuation is presumably caused by nearly degenerated intramolecular multiple orbitals, and shares a notion of quantum liquids where electronic excitations are fractionalized and S=1/ 2 spin is no longer an elementary particle.</p>

Journal

  • Butsuri

    Butsuri 75 (7), 433-438, 2020-07-05

    The Physical Society of Japan

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