New Semiconductor Material: Re6Se8Cl2
Columbia University researchers have recently published a groundbreaking paper introducing Re6Se8Cl2 as the fastest and most efficient semiconductor material known to man.
Re6Se8Cl2 is a synthetic superatomic material developed by Xavier Roy, one of the researchers involved in the study.
The paper explains that, unlike other materials that scatter when they come into contact with phonons, excitons in Re6Se8Cl2 actually bind with phonons to form a new type of quasiparticles called acoustic exciton-polarons. What sets these polarons apart is their ability to exhibit ballistic, or scatter-free, flow. This unique behavior holds the potential for faster and more efficient electronic devices in the future.
In experiments conducted by the team, acoustic exciton-polarons in Re6Se8Cl2 were found to move at an impressive speed, twice as fast as electrons in silicon. They were able to traverse several microns of the sample in less than a nanosecond. Considering that polarons can last for approximately 11 nanoseconds, the researchers believe that the exciton-polarons could cover more than 25 micrometers at a time. Furthermore, since these quasiparticles are controlled by light rather than electrical current and gating, theoretical devices utilizing Re6Se8Cl2 have the potential to achieve processing speeds in the femtosecond range, which is six orders of magnitude faster than the nanoseconds achievable in current Gigahertz electronics. Remarkably, all of this can be achieved at room temperature.
However, one major obstacle in utilizing Re6Se8Cl2 as a semiconductor material is the cost associated with one of its constituent elements, Rhenium, which is a rare and expensive element.