Chemically-engineered multipurpose spin selection in a double-level molecular device with spinterface

Abstract

Molecular spintronics has triggered a tremendous revolution in the fields of information storage, transport, and processing, within which the exploitation of multipurpose spintronic devices is one of the key challenges. In this paper, based on a nonmagnetic molecular object with two transport-active orbits connected parallelly to two magnetic electrodes, we reveal such structure behaves as an electronically-controllable multifucntional spin device. Dual and bipolar spin selectors are realized, without need to repeat the operation or reverse the spin state of the electrodes. The selection schemes could be engineered by tuning the distance between two orbits, which essentially stems from the inter-correlation between the spinterface and the local exchange interactions. Through a detailed design of the interfacial and local parameters, we disclose these behaviors are robust in the strongly correlated limit, but may be affected significantly by the strength of the spin imbalance of the electrode and the local energy level. Our results may afford an important guideline for a competitive magnetoelectronics molecular device, which could be easily manipulated through purely chemical technologies.

Keywords

• Molecular spintronics device
• Molecular junction
• Spin selection
• Spinterface
• Multifucntional