Ultra-high mobility electron gas

Description

Context: Scientists have produced electron gas with ultra-high mobility, which can speed up transfer of quantum information and signal from one part of a device to another and increase data storage and memory.

Ultra-high mobility electron gas can increase information transfer speed &data storage density in quantum devices.
The need for attaining new functionalities in modern electronic devices has led to the manipulation of property of an electron called spin degree of freedom along with its charge.
This has given rise to an altogether new field of spin-electronics or ‘spintronics’.
It has been realized that a phenomenon called the ‘Rashba effect’, which consists of splitting of spin-bands in an electronic system, might play a key role in spintronic devices.
- The Rashba effect, also called Bychkov–Rashba effect, is a momentum-dependent splitting of spin bands in bulk crystals and low-dimensional condensed matter systems (such as heterostructures and surface states) similar to the splitting of particles and anti-particles in the Dirac Hamiltonian.
In the ultra-high mobility 2d-electron gas (2DEG) due to the high mobility of the electron gas, electrons do not collide inside the medium for a long distance and hence do not lose the memory and information.
Hence, such a system can easily remember and transfer its memory for a long time and distance.
In addition, since they collide less during their flow, their resistance is very low, and hence they don’t dissipate energy as heat.
So, such devices do not heat up easily and need less input energy to operate.