Field Driven I-V Characteristics of an Atomic Chain Coupled to an Aharonov-Bohm Ring

We study the effect of threading magnetic field on the I-V characteristics of an atomic chain connected to an Aharonov-Bohm ring, which are classified into two groups depending on the even- and odd-ness of the number of atomic sites of the system. When the number of sites is odd, a Fano-type transmission resonance occurs, while the effect of threading magnetic field is simply reducing the current when the number of sites is even.