Spin Orbit Torque on a Curved Surface

• URL: http://arxiv.org/abs/2401.08966v1
• Date: Wed, 17 Jan 2024 04:42:07 GMT
• Title: Spin Orbit Torque on a Curved Surface
• Authors: Seng Ghee Tan, Che Chun Huang, Mansoor B.A.Jalil, Zhuobin Siu
• Abstract summary: This formulation could aid the study of spintronics, Dirac graphene, topological systems, and quantum information on curved surfaces. As devices trend smaller in dimension, the physics of local geometries on spin-orbit torque shall not be neglected. Our expressions allow spin-orbit anisotropy fields and hence spin-orbit torque to be computed over the entire surfaces of devices of any geometry.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We provide a general formulation of the spin-orbit coupling on a 2D curved surface. Considering the wide applicability of spin-orbit effect in spinor-based condensed matter physics, a general spin-orbit formulation could aid the study of spintronics, Dirac graphene, topological systems, and quantum information on curved surfaces. Particular attention is then devoted to the development of an important spin-orbit quantity known as the spin-orbit torque. As devices trend smaller in dimension, the physics of local geometries on spin-orbit torque, hence spin and magnetic dynamics shall not be neglected. We derived the general expression of a spin-orbit anisotropy field for the curved surfaces and provided explicit solutions in the special contexts of the spherical, cylindrical and flat coordinates. Our expressions allow spin-orbit anisotropy fields and hence spin-orbit torque to be computed over the entire surfaces of devices of any geometry.

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