Thermoelectronic transport through spin-crossover single molecule Fe[(H2Bpz2)2bipy]

Thermoelectronic transport through spin-crossover single molecule Fe[(H2Bpz2)2bipy]
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通过自旋交叉单分子 Fe[(H2Bpz2)2bipy] 进行热电子传输

DOI:
10.1088/1361-6463/aab29c
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发表时间:
2018-03
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
通讯作者:
K L Yao
K L Yao
中科院分区:
其他
文献类型:
--
作者:
N Liu;L Zhu;K L Yao

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利用密度泛函理论结合Keldysh非平衡格林函数方法,研究了具有自旋交叉特性的单核FeII分子的高、低自旋态的热输运性质。发现高自旋分子结比低自旋分子结具有更大的电流,从而产生热致开关效应。此外,对于高自旋态分子,自旋向上的热流被强烈阻断,从而获得纯热自旋电流。提高的塞贝克系数和高自旋态的优值表明它是热电应用的理想候选材料。
By means of density functional theory combined with the method of Keldysh nonequilibrium Green’s function, the thermal transport properties of high- and low-spin states of mononuclear FeII molecules with spin-crossover characteristics are studied. It is found that the high-spin molecular junction has a larger current than the low-spin one, producing thermally-induced switching effect. Furthermore, for high spin state molecule, the spin-up thermo-current is strongly blocked, thus achieving a pure thermo spin current. The enhanced Seebeck coefficient and the figure of merit value of high-spin state indicate that it is an ideal candidate for thermoelectric applications.
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