Electron Mobility by Heartsound Audio



High electron mobility in a material is like an empty highway. Comparable to electrons that can flow through without any obstacles or congestion to slow or scatter them off their path.

The higher the electron mobility, the more efficient is the electrical conductivity. This also means that less energy is lost or wasted as electrons zip through. Advanced nano materials  will dramatically display  high electron mobility, and have become essential for more effective and substantial electronic devices that will do more with less power. 

Physicists at MIT and elsewhere have recently broken records with the level of electron mobility in the film of ternary tetradymite. This is a class of mineral that is naturally found in deep deposits of gold and quartz. 

For this experiment, scientists grew pure ultra thin films of the material, in a specific way to minimize defects in the crystalline structure. This tiny film, much thinner than a human hair, was found to exhibit the highest electron mobility in its class. 

The research team estimates the materials mobility by detecting quantum oscillations when currents pass through. These oscillations are the mark of quantum mechanical behavior of electrons in material. They discovered a certain rhythm of the oscillators that is characteristic of high electron mobility. This mobility is higher than any Ternary Films in its class! 

The results, posted in Materials Today (Physics), point to ternary tetradymite Thin films as a promising material for future electronics. The material could also be the basis for spintronic  devices, Which process information using an electron’s spin, hence requiring far less power than conventional silicon based devices. 

The study also uses quantitive oscillations as a highly effective tool for measuring a materials electronic performance. The team estimates that the ternary tetradymite Thin film Exhibits mobility of 

 10,000 cm2/V-S  The highest mobility of Any film yet measured. The team suspects it has something to do with its low defects and impurities, which they were able to minimize during these precise growing strategies. 

“ This is showing it’s possible to go a giant step further, when properly controlling these complex systems.” reports Moodera, an MIT lab researcher. “ This tells us we’re headed in the right direction, and we have the right system to proceed further to keep perfecting this material down to even much thinner films, And proximity coupling for use in future spintronics and wearable thermoelectric devices.” 

The future is bright for electron mobility and spintronics! 


Hugs,

Krissy 


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