Spin-gapped Mott insulator with the dimeric arrangement of twisted molecules Zn(tmdt)2
Spin-gapped Mott insulator with the dimeric arrangement of twisted molecules Zn(tmdt)2
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具有扭曲分子 Zn(tmdt)2 二聚体排列的自旋间隙莫特绝缘体
DOI：
10.1103/physrevb.95.224427
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发表时间：
2017
影响因子：
3.7
通讯作者：
and Kazushi Kanoda
中科院分区：
文献类型：
--
作者：
Rina Takagi;Hiro Gangi;Kazuya Miyagawa;Biao Zhou;Akiko Kobayashi;and Kazushi Kanoda
对单组分分子材料Zn（tmdt）进行核磁共振测量，其中tmdt形成类似于准二维Mott绝缘体和超导体中所谓的-型分子堆积的排列。对粉末光谱的详细分析揭示了超导体中的局部自旋磁化率。所得到的位移和弛豫速率揭示了单重态-三重态激发的thespins，表明Zn（tmdt）是一个自旋带隙的莫特绝缘体，与传统的分子莫特系统相比，具有非常大的电子相关性。
nuclear magnetic resonance measurements were performed for a single-component molecular material Zn(tmdt), in which tmdt's form an arrangement similar to the so-called-type molecular packing in quasi-two-dimensional Mott insulators and superconductors. A detailed analysis of the powder spectra uncovered local spin susceptibility in the tmdtorbitals. The obtained shift and relaxation rate revealed singlet-triplet excitations of thespins, indicating that Zn(tmdt)is a spin-gapped Mott insulator with exceptionally large electron correlations compared to conventional molecular Mott systems.