Tuning of the ground state in electron doped anthracene.
Tuning of the ground state in electron doped anthracene.
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DOI：
10.1039/c4dt00071d
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发表时间：
2014-06
影响因子：
4
通讯作者：
Quynh T N Phan;S. Heguri;Y. Tanabe;H. Shimotani;T. Nakano;Y. Nozue;K. Tanigaki
中科院分区：
文献类型：
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作者：
Quynh T N Phan;S. Heguri;Y. Tanabe;H. Shimotani;T. Nakano;Y. Nozue;K. Tanigaki
采用室温固相机械扩散法制备了高质量的蒽（AN）掺杂钾（K）（1：1和2：1）的块状样品，并对其进行了磁性和光学性质的研究。通过SQUID和ESR测量证实了K_1（AN）中几乎只有一个电子从K转移到AN。一个明显的磁峰中心在150 K与反铁磁相互作用，这很可能是解释在现场库仑排斥的莫特绝缘状态。K1（AN）的光谱清楚地显示了绝缘态，以及AN的LUMO衍生带的电子占据。我们的研究结果表明，一个典型的散装碳氢化合物的基态碱金属嵌入调谐。
High quality bulk samples of anthracene (AN) doped with potassium (K) in 1 : 1 and 2 : 1 stoichiometries were successfully prepared by a method involving a room temperature solid-state mechanical diffusion process prior to intercalation reactions during heat treatment, and their physical properties were studied using both magnetic and optical measurements. The transfer of almost one electron from K to AN in K1(AN) was confirmed by SQUID and ESR measurements. A pronounced magnetic hump centered at 150 K associated with antiferromagnetic interactions was observed, which can most likely be interpreted in terms of on-site Coulomb repulsions of the Mott insulating states. Optical spectra of K1(AN) clearly showed the insulating states, as well as the electron occupation of the LUMO-derived band of AN. Our results demonstrated tuning of the ground state of a typical bulk hydrocarbon by alkali metal intercalation.