论文标题
具有非磁性铁电不稳定性的离子自旋链系统中的磁激发
Magnetic excitations in an ionic spin-chain system with a non-magnetic ferroelectric instability
论文作者
论文摘要
磁性和电介质之间的互相关有望提供新颖的新兴现象。在这里，通过$^1 $ H-NMR光谱研究了有机供体旋转链系统TTF-BA中具有铁电基态的磁激发。 NMR偏移和核自旋放松率的急剧下降$ T_1^{ - 1} $在53 K处的非磁性过渡的标志。值得注意的是，NMR Shift的分析和$ T_1^{ - 1} $的分析决定了对TTF-BA的paramagnetic Spimibility tttf-ba中的spins spins pressians ttt firestibal test firestibal to te triped firgains firgale firge for Tirestion fires to for heis。我们提出，自旋晶格耦合和铁电的不稳定性合作，以促进具有非磁性铁电不稳定性的离子自旋系统中的前寿命极性单重。
Cross-correlation between magnetism and dielectric is expected to offer novel emergent phenomena. Here, magnetic excitations in the organic donor-acceptor spin-chain system, TTF-BA, with a ferroelectric ground state is investigated by $^1$H-NMR spectroscopy. A nonmagnetic transition with a ferroelectric order is marked by sharp drops in NMR shift and nuclear spin relaxation rate $T_1^{-1}$ at 53 K. Remarkably, the analyses of the NMR shift and $T_1^{-1}$ dictate that the paramagnetic spin susceptibility in TTF-BA is substantially suppressed from that expected for the 1D Heisenberg spins. We propose that the spin-lattice coupling and the ferroelectric instability cooperate to promote precursory polar singlet formation in the ionic spin system with a nonmagnetic ferroelectric instability.
