Abstract
Comprehensive calculations of the long-wavelength optical phonons are reported for zinc-blende BN films by exploiting a linear response theory to simulate far-infrared reflectivity and transmission spectra at oblique incidence. A rigid-ion-model is used to study the lattice dynamics of the unconventional BN/GaN short-period superlattices (SLs). Besides empathizing, the anisotropic mode behaviour of optical phonons, the study has offered evidence of acoustic-mode anti-crossing, mini-gap formation, confinement, as well as BN-like modes falling between the gap regions separating the optical phonons of the two bulk (BN, GaN) semiconductor materials. A bond-polarizability approach within the second-nearest-neighbour linear-chain model is also employed to visualize the Raman intensity profiles of the short-period BN/GaN SLs, revealing major trends of the phonon characteristics noted in many conventional SLs, while eliciting some interesting contrasts.
| Original language | English |
|---|---|
| Pages (from-to) | 430-433 |
| Number of pages | 4 |
| Journal | Physica Status Solidi (C) Current Topics in Solid State Physics |
| Volume | 12 |
| Issue number | 4-5 |
| DOIs | |
| Publication status | Published - 2015 Apr 1 |
Fingerprint
Keywords
- Berreman effect
- Far-infrared reflectivity and transmission
- Raman intensity profiles
- Unusual phonon modes
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Unusual phonon mode behaviour in zinc-blende BN/GaN superlattices. / Talwar, Devki N.; Zhou, Andrew F.; Yang, Tzuen Rong.
In: Physica Status Solidi (C) Current Topics in Solid State Physics, Vol. 12, No. 4-5, 01.04.2015, p. 430-433.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Unusual phonon mode behaviour in zinc-blende BN/GaN superlattices
AU - Talwar, Devki N.
AU - Zhou, Andrew F.
AU - Yang, Tzuen Rong
PY - 2015/4/1
Y1 - 2015/4/1
N2 - Comprehensive calculations of the long-wavelength optical phonons are reported for zinc-blende BN films by exploiting a linear response theory to simulate far-infrared reflectivity and transmission spectra at oblique incidence. A rigid-ion-model is used to study the lattice dynamics of the unconventional BN/GaN short-period superlattices (SLs). Besides empathizing, the anisotropic mode behaviour of optical phonons, the study has offered evidence of acoustic-mode anti-crossing, mini-gap formation, confinement, as well as BN-like modes falling between the gap regions separating the optical phonons of the two bulk (BN, GaN) semiconductor materials. A bond-polarizability approach within the second-nearest-neighbour linear-chain model is also employed to visualize the Raman intensity profiles of the short-period BN/GaN SLs, revealing major trends of the phonon characteristics noted in many conventional SLs, while eliciting some interesting contrasts.
AB - Comprehensive calculations of the long-wavelength optical phonons are reported for zinc-blende BN films by exploiting a linear response theory to simulate far-infrared reflectivity and transmission spectra at oblique incidence. A rigid-ion-model is used to study the lattice dynamics of the unconventional BN/GaN short-period superlattices (SLs). Besides empathizing, the anisotropic mode behaviour of optical phonons, the study has offered evidence of acoustic-mode anti-crossing, mini-gap formation, confinement, as well as BN-like modes falling between the gap regions separating the optical phonons of the two bulk (BN, GaN) semiconductor materials. A bond-polarizability approach within the second-nearest-neighbour linear-chain model is also employed to visualize the Raman intensity profiles of the short-period BN/GaN SLs, revealing major trends of the phonon characteristics noted in many conventional SLs, while eliciting some interesting contrasts.
KW - Berreman effect
KW - Far-infrared reflectivity and transmission
KW - Raman intensity profiles
KW - Unusual phonon modes
UR - http://www.scopus.com/inward/record.url?scp=84928591214&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84928591214&partnerID=8YFLogxK
U2 - 10.1002/pssc.201400157
DO - 10.1002/pssc.201400157
M3 - Article
AN - SCOPUS:84928591214
VL - 12
SP - 430
EP - 433
JO - Physica Status Solidi (C) Current Topics in Solid State Physics
JF - Physica Status Solidi (C) Current Topics in Solid State Physics
SN - 1862-6351
IS - 4-5
ER -