**SNS= strongly noncrystalline solid**

## https://en.wikipedia.org/wiki/Chemical_bond

## 2015 [AMORPHOUS DIELECTRIC THIN FILMS WITH EXTREMELY LOW MECHANICAL LOSS](http://www.research.physics.berkeley.edu/hellman/papers/amm-2015-0059_Liu.pdf)

> Our result supports the notion that **a-Si can be made a “perfect glass” with “crystal-like” properties**,
> thus offering an encouraging opportunity to use it as a simple crystal dielectric alternative in applications, such as in modern
> quantum devices where TLS are the source of dissipation, decoherence and 1/f noise.