Abstract
We numerically investigated the spin transport through a poly(p-phenylene)-like molecular wire connected to three noncollinear polarized terminals. Using the generalized Green’s function technique based on the tight-binding model and Landauer–Buttiker theory, we have calculated the transmission probability, currents, and tunnel magnetoresistance (TMR). It is found that the spin-dependent transport properties are significantly influenced by the relative directions of spin polarized leads, in which one can tune the magnitude of TMR by changing spin direction in the leads. We have also tested the effect of terminal positions as a source of quantum interference. Our results show that different terminal positions have profound effects on the current and TMR characteristics. Different TMR strength and threshold bias voltage Vt are also detected.
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