Berlin 2024 – scientific programme

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MA: Fachverband Magnetismus

MA 29: Spin-Dependent Phenomena in 2 D

MA 29.8: Talk

Wednesday, March 20, 2024, 16:45–17:00, EB 202

An all Phosphorene Lattice Nanometric Spin Valve — •Soumya Jyoti Ray — Indian Institute of Technology Patna

Phosphorene is a unique semiconducting two-dimensional platform for enabling spintronic devices integrated with phosphorene nanoelectronics. Here, we have designed an all phosphorene lattice lateral spin valve device, conceived via patterned magnetic substituted atoms of 3d-block elements at both ends of a phosphorene nanoribbon acting as ferromagnetic electrodes in the spin valve. Through First-principles based calculations, we have extensively studied the spin-dependent transport characteristics of the new spin valve structures. Systematic exploration of the magnetoresistance (MR) of the spin valve for various substitutional atoms and bias voltage resulted in a phase diagram offering a colossal MR for V and Cr-substitutional atoms. Such MR can be directly attributed to their specific electronic structure, which can be further tuned by a gate voltage, for electric field controlled spin valves. The spin-dependent transport characteristics here reveal new characteristics such as negative conductance oscillation and switching of the sign of MR due to change in the majority spin carrier type. Our study creates possibilities for design of nanometric spin valves, which could enable the integration of memory and logic for all phosphorene 2D processors.

Keywords: Phosphorene; Spin Valve; 2D materials; Maagnetoresistance; Spin Circuit