Rashba Splitting

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Overview:

Using some 2-D carbides or nitrides of transition metals, a team of scientists have computationally designed a new composite quantum material that exhibits an exotic quantum property called Rashba splitting, in colossal scale, in a metallic environment.

Key Findings:

 

  • Scientists focused their computational research on 2-D quantum materials, which are materials with confined geometry in one of the directions. 2-D materials are important as they are easier to assimilate in devices.
  • This material can help interfacing with other substrates (2D substrates like graphene) in spintronic devices like spin transistors, spin diodes, and spin filters that take advantage of electron spin, a quantum property of electrons, to achieve higher performance.
  • The team focused on creating composite 2-D quantum materials, which are quantum materials exhibiting two apparently different quantum properties, but connected by the basic requirement of symmetries.
  • In their study, by proper choice of materials ingredients, the workers managed to demonstrate the existence of two distinct quantum phenomena, - Rashba effect, (a momentum-dependent splitting of spin bands) and nonlinear anomalous Hall effect, arising from anomalous velocity of the electrons, in the same 2-D material.
  • With the 2D composite material designed computationally, the scientists hope that the challenges of manufacturing Janus MXenes in the lab and at a large scale will be gradually overcome to bring benefits for devices, energy security, and the economy.

 


Q1) What is Quantum computing?

Quantum computing is a cutting-edge field of computing that utilizes the principles of quantum mechanics to process information. Unlike classical computers that use bits to represent data as 0s and 1s, quantum computers use quantum bits or qubits, which can represent 0, 1, or both states simultaneously through a phenomenon called superposition

Source: Scientists design first-ever 2D composite quantum material useful for spintronic devices like transistors & diodes