MAGNETIC-FIELD CONTROL OF ELECTRON MOTION IN MOLECULAR NANOSTRUCTURES- STEP-LIKE BEHAVIOR AND SPIN POLARIZATION OF A BRIDGE-ASSISTED INTERELECTRODE CURRENT

Anomalies in low-temperature behavior are predicted for the tunneling current through a molecular wire connecting two microelectrodes. Apply ing an external magnetic field the possibility of spin filtration and spin polarization of the current is demonstrated for a wire in which p aramagnetic ions have been embedded. A transfer blocking is obtained f or incoming spin-down polarized electrons as well as a separation of i ncoming spin-up polarized electrons into a definite ratio of outgoing spin-up and spin-down electrons.