Abstract
In this work we study the infrared (IR) optical properties of n-type PbSe samples doped with Cl exhibiting an electron carrier density in the range 0.75×1019 cm-3-3.8×1019 cm -3. The IR reflectivity spectra are dominated by free carriers giving rise to blue-shifted reflectivity minimum in the region > 700cm -1. The analysis of the experimental reflectivity spectra showed that the conventional Drude model with a constant carrier relaxation time failed to describe the behaviour in the whole frequency range. It was found that the lineshape of the reflectivity spectra can be better described by a frequency dependent electron damping parameter with resonant-like behaviour similar to the one observed in the case of resonant electron scattering off potential wells. The density of states effective mass was found to increase with increasing carrier concentration supporting the non-parabolicity of the band model for PbSe.
| Original language | English |
|---|---|
| Title of host publication | AIP Conference Proceedings |
| Pages | 155-158 |
| Number of pages | 4 |
| Volume | 1449 |
| DOIs | |
| Publication status | Published - 2012 |
| Event | 9th European Conference on Thermoelectrics, ECT 2011 - Thessaloniki, Greece Duration: Sep 28 2011 → Sep 30 2011 |
Other
| Other | 9th European Conference on Thermoelectrics, ECT 2011 |
|---|---|
| Country | Greece |
| City | Thessaloniki |
| Period | 9/28/11 → 9/30/11 |
Fingerprint
Keywords
- Free carrier effective mass
- Infrared Reflectivity
- Thermoelectric PbSe
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Frequency dependent electron damping in n-type PbSe. / Hasapis, Th C.; Androulakis, J.; Hatzikraniotis, E.; Paraskevopoulos, K. M.; Kanatzidis, Mercouri G.
AIP Conference Proceedings. Vol. 1449 2012. p. 155-158.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Frequency dependent electron damping in n-type PbSe
AU - Hasapis, Th C.
AU - Androulakis, J.
AU - Hatzikraniotis, E.
AU - Paraskevopoulos, K. M.
AU - Kanatzidis, Mercouri G
PY - 2012
Y1 - 2012
N2 - In this work we study the infrared (IR) optical properties of n-type PbSe samples doped with Cl exhibiting an electron carrier density in the range 0.75×1019 cm-3-3.8×1019 cm -3. The IR reflectivity spectra are dominated by free carriers giving rise to blue-shifted reflectivity minimum in the region > 700cm -1. The analysis of the experimental reflectivity spectra showed that the conventional Drude model with a constant carrier relaxation time failed to describe the behaviour in the whole frequency range. It was found that the lineshape of the reflectivity spectra can be better described by a frequency dependent electron damping parameter with resonant-like behaviour similar to the one observed in the case of resonant electron scattering off potential wells. The density of states effective mass was found to increase with increasing carrier concentration supporting the non-parabolicity of the band model for PbSe.
AB - In this work we study the infrared (IR) optical properties of n-type PbSe samples doped with Cl exhibiting an electron carrier density in the range 0.75×1019 cm-3-3.8×1019 cm -3. The IR reflectivity spectra are dominated by free carriers giving rise to blue-shifted reflectivity minimum in the region > 700cm -1. The analysis of the experimental reflectivity spectra showed that the conventional Drude model with a constant carrier relaxation time failed to describe the behaviour in the whole frequency range. It was found that the lineshape of the reflectivity spectra can be better described by a frequency dependent electron damping parameter with resonant-like behaviour similar to the one observed in the case of resonant electron scattering off potential wells. The density of states effective mass was found to increase with increasing carrier concentration supporting the non-parabolicity of the band model for PbSe.
KW - Free carrier effective mass
KW - Infrared Reflectivity
KW - Thermoelectric PbSe
UR - http://www.scopus.com/inward/record.url?scp=84872976059&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84872976059&partnerID=8YFLogxK
U2 - 10.1063/1.4731520
DO - 10.1063/1.4731520
M3 - Conference contribution
AN - SCOPUS:84872976059
SN - 9780735410480
VL - 1449
SP - 155
EP - 158
BT - AIP Conference Proceedings
ER -