why should we work with STM(scanning tunneling microscopy) at low temperatures and in high vacuum

Thread Starter

Kadav

Joined May 11, 2018
143
Hello i would most importantly love to know the answer of why we should work with STM at low temperatures.

I understand that we need to work with STM microscopy at high vacuum so that we can make the work function easy , since it is a metal to vacuum interface . but i don't know if that may be a correct answer
 

Papabravo

Joined Feb 24, 2006
14,868
The use of low temperatures is designed to reduce the vibrational kinetic energy of the individual atoms. An image of things that are not moving, or moving just a little bit, will be clearer than ones where things are moving with higher energy. Vibrational kinetic energy depends on temperature.
 

Thread Starter

Kadav

Joined May 11, 2018
143
The use of low temperatures is designed to reduce the vibrational kinetic energy of the individual atoms. An image of things that are not moving, or moving just a little bit, will be clearer than ones where things are moving with higher energy. Vibrational kinetic energy depends on temperature.
thanks very much
 
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