Optical, Electrical and Magnetic Properties of Potassium Metal Loaded into Channel-Type Zeolite L
Optical, Electrical and Magnetic Properties of Potassium Metal Loaded into Channel-Type Zeolite L
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DOI：
10.7566/jpsj.85.024703
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发表时间：
2016-02
影响因子：
1.7
通讯作者：
P. T. Thi;T. Nakano;Y. Sakamoto;Y. Nozue
中科院分区：
文献类型：
--
作者：
P. T. Thi;T. Nakano;Y. Sakamoto;Y. Nozue
将金属钾负载到具有内径为1 nm的一维（1D）主通道的K型沸石L晶体中。每个晶胞K原子的负载密度n从0变为9.6。对负载K的L型沸石晶体粉末的光学、电学和磁学性质进行了测量。在所有的K-加载样品中，在1.1eV处观察到共振光学吸收-反射带。另一个反射带在1.8 eV处出现在\（n \gtrapprox 5\）。1.1和1.8 eV的频带被分配到各自的激发从1 s到1 p和从1 p到1d状态的s-电子限制在主通道。在\（n \gtrapprox 3\）处观察到约0.3 eV的中红外吸收，并随n增加而增加。这种吸收被分配给s-电子的Drude项。在\（3 \lessapprox n \lessapprox 9\）处观察到与温度相关的半导体电阻率。在\（9 \lessapprox n\）处观察到接近金属的电阻率。半导体和金属的电阻率被分配给极性。
Potassium metal was loaded into K-form zeolite L crystals which have one-dimensional (1D) main-channels with an inside diameter of ≈1 nm. The loading density of K atoms per unit cell, n, was changed from 0 to 9.6. Optical, electrical and magnetic properties were measured for the powders of K-loaded zeolite L crystals. A resonant optical absorption-reflection band is observed at ≈1.1 eV in all K-loaded samples. Another reflection band at ≈1.8 eV appears at \(n \gtrapprox 5\). The 1.1 and 1.8 eV bands are assigned to the respective excitations from 1s to 1p and from 1p to 1d states of s-electrons confined in main-channels. A mid-infrared absorption around 0.3 eV is observed at \(n \gtrapprox 3\) and increases with n. This absorption is assigned to a Drude term of s-electrons. A temperature-dependent semiconducting resistivity is observed at \(3 \lessapprox n \lessapprox 9\). A nearly metallic resistivity is observed at \(9 \lessapprox n\). The semiconducting and metallic resistivities are assigned to the po...