ShengBTE v1.2.0 released

Version 1.2.0 of ShengBTE has been released and can be obtained from the Downloads section. This version contains important bug fixes and delivers improved performance, thanks to Dr. Fanchen Meng:

• Fix bugs in phonon_espresso subroutine in phonon_routines.f90.

• Calculate the iteraction matrix elements before entering temperature loop and store them in a look-up table.

• Parallelize the iterative process.