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Negative tunneling magneto-resistance in quantum wires with strong spin-orbit coupling

Seungju, Han; Serra, Llorenç; Choi, Mahn-Soo
Journal of Physics: Condensed Matter 27, 255001 (1-6) (2015)

We consider a two-dimensional magnetic tunnel junction of the FM/I/QW(FM+SO)/I/N structure, where FM, I and QW(FM+SO) stand for a ferromagnet, an insulator and a quantum wire with both magnetic ordering and Rashba spin–orbit (SOC), respectively. The tunneling magneto-resistance (TMR) exhibits strong anisotropy and switches sign as the polarization direction varies relative to the quantum-wire axis, due to interplay among the one-dimensionality, the magnetic ordering, and the strong SOC of the quantum wire.