孤子物质在破缺铁电有序中的命运
Fate of a soliton matter upon symmetry-breaking ferroelectric order
摘要：
在具有简并基态的一维（1D）系统中，它们的域边界（被称为孤子）以拓扑激发的形式出现，通常携带非常规的电荷和自旋;然而，孤子激发仅在无序的1D区域中至关重要。那么问题就来了：孤子如何符合3D有序态？在这里，使用准一维有机铁电体，TTF-CA，与退化的极性二聚体，我们追求的命运的自旋孤子电荷孤子复合物质在一维极性二聚体液体后，其过渡到3D铁电秩序的电阻率，NMR和NQR测量。我们证明了孤子物质经过中性自旋-自旋孤子配对和自旋-电荷孤子配对形成极化子，符合三维有序。前者通过三重态激发来贡献磁性，而后者则携带电流。我们的结果揭示了孤子物质凝聚成三维有序态的全貌。
英文摘要：
In a one-dimensional (1D) system with degenerate ground states, their domain boundaries, dubbed solitons, emerge as topological excitations often carrying unconventional charges and spins; however, the soliton excitations are only vital in the non-ordered 1D regime. Then a question arises; how do the solitons conform to a 3D ordered state? Here, using a quasi-1D organic ferroelectric, TTF-CA, with degenerate polar dimers, we pursue the fate of a spin-soliton charge-soliton composite matter in a 1D polar-dimer liquid upon its transition to a 3D ferroelectric order by resistivity, NMR and NQR measurements. We demonstrate that the soliton matter undergoes neutral spin-spin soliton pairing and spin-charge soliton pairing to form polarons, coping with the 3D order. The former contributes to the magnetism through triplet excitations whereas the latter carries electrical current. Our results reveal the whole picture of a soliton matter that condenses into the 3D ordered state.
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