Quantum interference of electron system in 2D network of circular molecular orbits

摘要

Our theoretical study reports on the quantum interference effect expected to be found in the correlated state of the hole-doped electron system in 2D networks of circular molecular orbits, where the ground state of the system is described by a FQHE-like state. When the phase-correlation length lambda(-) is larger than the incompressibility length lambda(Q), the system of tunneling-coupled 2 FQHE-like states shows the interference of the Josephson effect. On the other hand, when lambda(Q) > lambda(-), the system shows a dielectric interference effect analogous to the superconductor junction. In the film crystal of a multi-layer structure of FQHE-like systems of low hole-doping, logarithmically cyclic negative-positive change of film capacitance is expected to appear at "anomalous thicknesses" of the film. Comparison of the theoretical results with the interference effect found in the dielectric measurement of film crystals of low-doped La2-xSrxCuO4 reveals quantitative agreement. [References: 14]