Phase Diagram of an Organic Superconductor λ-(BETS)<sub>2 </sub>GaCl<sub>4 </sub>in the Vicinity of the Superconducting Phase Revealed by NMR Spectroscopy

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Other Title
  • 有機超伝導体λ-(BETS)<sub>2 </sub>GaCl<sub>4</sub>の超伝導相近傍の相図
  • 有機超伝導体λ-(BETS)₂GaCl₄の超伝導相近傍の相図
  • ユウキ チョウデンドウタイl-(BETS)₂ GaCl ₄ ノ チョウデンドウソウ キンボウ ノ ソウズ

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Abstract

<p>Electronic properties of an organic superconductor λ-(BETS)2 GaCl4 were investigated by 13C and 69,71Ga-NMR spectroscopy. We found that the spin-density-wave phase is adjacent to the superconducting (SC) phase. In addition, 69,71Ga-NMR results suggested that the enhancement of (T1T)-1 observed in the SC salt is due to a magnetic origin, confirming the existence of spin-density-wave fluctuation even just above Tc . In the presence of such spin fluctuations, the SC wave function is found to be a spin singlet with line nodes on the SC gap, which can be explained by the d-wave symmetry.</p>

Journal

  • Butsuri

    Butsuri 76 (7), 450-455, 2021-07-05

    The Physical Society of Japan

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