Charge transport in the insulating state of (DMe-DCNQI)2Li above T(SP): a possible fractional charge soliton conduction with +/-1 / 2e.
Charge transport in the insulating state of (DMe-DCNQI)2Li above T(SP): a possible fractional charge soliton conduction with +/-1 / 2e.
复制标题
T(SP) 以上的 (DMe-DCNQI)2Li 绝缘状态下的电荷传输：可能存在 /-1 / 2e 的分数电荷孤子传导。
DOI：
10.1103/physrevlett.91.056604
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发表时间：
2003
影响因子：
8.6
通讯作者：
R. Kato
中科院分区：
文献类型：
--
作者：
M. Hiraoka;H. Sakamoto;K. Mizoguchi;Tatsuhisa Kato;R. Kato
用W波段电子顺磁共振(EPR)对自旋-Peierls体系(DME-DCNQI)2Li进行了研究，揭示了T(SP)以上绝缘4K(F)电荷密度波态的电荷输运机制。相邻DCNQI列之间的电子跳跃提供了EPR线宽的额外加宽，因为相邻列相对于g移位通常彼此不等价。得到的柱间跳跃率的结论是，电子对相邻列中带有分数电荷e/2的空穴孤子的跃迁主导着柱间电荷的输运。
A spin-Peierls system (DMe-DCNQI)2Li is studied with W-band electron paramagnetic resonance (EPR) ( approximately 94 GHz) to unveil a charge transport mechanism in the insulating 4k(F) charge density wave state above T(SP). The electron hopping between the neighbor DCNQI columns provides an additional broadening of the EPR linewidth, since the neighbor columns are generally nonequivalent to each other with respect to g shift. The obtained intercolumn hopping rates lead us to the conclusion that the electron hopping to a hole soliton carrying a fractional charge of e / 2 in the neighbor column dominates the intercolumn charge transport.