Aromaticity, transport and spin filter properties of a few molecular systems

Abstract

Low-dimensional materials have attracted a huge attention of chemists and physicists in recent years.[1, 2] The appearance of anomalous novel properties in these materials has made them very interesting to investigate. The main reason behind these properties is quantum confinement effects in the low dimension.[3-9] Actually, the motions of microscopic degrees of freedom such as electrons, phonons get constrained due to the reduced length scale for these materials. In such condition, electronic correlations and restricted boundary conditions introduce various exotic properties in these materials.[10-14] To explain these special features of low dimensional systeM.S., one needs some approaches of physics which is different from the three dimensional one. In general, low dimensional systeM.S. are treated in fully quantum mechanical way to explain various effects such as Aharonov-Bohm effect[15], persistent currents[16], phase-coherent transport[17] etc. Very recently, metal-insulator transitions,[18] high temperature superconductivity[19, 20] and Kondo effect[21-24] in low dimensions also have created a huge curiosity among the scientists.