Towards spintronics via tunneling through asymmetric barriers

• URL: http://arxiv.org/abs/2603.18187v1
• Date: Wed, 18 Mar 2026 18:34:30 GMT
• Title: Towards spintronics via tunneling through asymmetric barriers
• Abstract summary: We show that spin-resolved circulating currents emerge on a closed chain even for symmetric initial configurations.<n>The effect can be enhanced or reversed by appropriate initial state preparation and tuning the barrier asymmetry to resonant conditions.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Spin transport typically relies on direct manipulation of the spin degree of freedom via magnetic fields, spin-orbit coupling, or engineered spin-dependent potentials. We show theoretically that directional spin currents can arise in a relatively simple setting - a one-dimensional interacting fermionic ring with static, spin-independent asymmetric barriers. By introducing asymmetric potential barrier geometry, spin-resolved circulating currents emerge on a closed chain even for symmetric initial configurations. The effect can be enhanced or reversed by appropriate initial state preparation and tuning the barrier asymmetry to resonant conditions.

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