Phonons in database{ …_zb{} } and database{ …_wz{} }

There are about 23 identical groups available directly under all zincblende- and wurtzite-related groups. In this section we describe two of them, specifically all groups related to phonons:

• acoustic_phonons{}

• optical_phonons{}

Phonons in zincblende materials

database{ …{ acoustic_phonons{} } } for zincblade

LA_energy

longitudinal acoustic phonon energy

type:

double

unit:

eV

TA_energy

transverse acoustic phonon energy

type:

double

unit:

eV

database{ …{ optical_phonons{} } } for zincblade

LO_energy

energy of longitudinal optical phonon

type:

double

unit:

eV

LO_width

width of longitudinal optical phonon

type:

double

unit:

nm

TO_energy

energy of transverse optical phonon

type:

double

unit:

eV

Phonons in wurtzite materials

database{ …{ acoustic_phonons{} } } for wurtzite

LA_energy

energy of longitudinal acoustic phonon

type:

double

unit:

eV

TA_energy:

energy of transverse acoustic phonon

type:

double

unit:

eV

database{ …{ optical_phonons{} } } for wurtzite

LO_energy_l

energy of longitudinal optical phonon (along hexagonal c axis)

type:

double

unit:

eV

LO_energy_t

energy of longitudinal optical phonon (perpendicular to hexagonal c axis)

type:

double

unit:

eV

LO_width

width of longitudinal optical phonon

type:

double

unit:

nm

TO_energy_l

energy of transverse optical phonon (along hexagonal c axis)

type:

double

unit:

eV

TO_energy_t

energy of transverse optical phonon (perpendicular to hexagonal c axis)

type:

double

unit:

eV