Abstract
Single crystals of Au- and Ag-doped ReSe2 (ReSe2:Au and ReSe2:Ag) have been grown by chemical vapor transport (CVT) method using iodine as a transporting agent. The optical properties are studied by absorption and polarized-thermoreflectance (PTR) spectroscopy at different polarization angles in the temperature range between 12 and 300 K. The direct band-edge excitonic transitions (Eex1, Eex 2, Eex3, and Eex s ) have been clearly revealed for the first time in the absorption spectra when the samples are made thin enough. The dominant Eex 1 and Eex 2 excitonic transitions gets strongest as the polarization is parallel and perpendicular to the b-axis, respectively. The parameters that describe the temperature dependence of the excitonic transition energy and the broadening function are extracted and discussed. We have also performed electrical conductivity and Hall measurements at different temperatures to derive the activation energy (∼95 and 50meV for ReSe 2:Au and ReSe2:Ag, respectively).
| Original language | English |
|---|---|
| Article number | 04CH06 |
| Journal | Japanese Journal of Applied Physics |
| Volume | 52 |
| Issue number | 4 PART 2 |
| DOIs | |
| Publication status | Published - 2013 Apr 1 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
- Physics and Astronomy(all)
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Optical and electrical properties of Au- and Ag-doped ReSe2. / Jian, Yu Ci; Lin, Der Yuh; Wu, Jenq Shinn; Huang, Ying Sheng.
In: Japanese Journal of Applied Physics, Vol. 52, No. 4 PART 2, 04CH06, 01.04.2013.Research output: Contribution to journal › Article
TY - JOUR
T1 - Optical and electrical properties of Au- and Ag-doped ReSe2
AU - Jian, Yu Ci
AU - Lin, Der Yuh
AU - Wu, Jenq Shinn
AU - Huang, Ying Sheng
PY - 2013/4/1
Y1 - 2013/4/1
N2 - Single crystals of Au- and Ag-doped ReSe2 (ReSe2:Au and ReSe2:Ag) have been grown by chemical vapor transport (CVT) method using iodine as a transporting agent. The optical properties are studied by absorption and polarized-thermoreflectance (PTR) spectroscopy at different polarization angles in the temperature range between 12 and 300 K. The direct band-edge excitonic transitions (Eex1, Eex 2, Eex3, and Eex s ) have been clearly revealed for the first time in the absorption spectra when the samples are made thin enough. The dominant Eex 1 and Eex 2 excitonic transitions gets strongest as the polarization is parallel and perpendicular to the b-axis, respectively. The parameters that describe the temperature dependence of the excitonic transition energy and the broadening function are extracted and discussed. We have also performed electrical conductivity and Hall measurements at different temperatures to derive the activation energy (∼95 and 50meV for ReSe 2:Au and ReSe2:Ag, respectively).
AB - Single crystals of Au- and Ag-doped ReSe2 (ReSe2:Au and ReSe2:Ag) have been grown by chemical vapor transport (CVT) method using iodine as a transporting agent. The optical properties are studied by absorption and polarized-thermoreflectance (PTR) spectroscopy at different polarization angles in the temperature range between 12 and 300 K. The direct band-edge excitonic transitions (Eex1, Eex 2, Eex3, and Eex s ) have been clearly revealed for the first time in the absorption spectra when the samples are made thin enough. The dominant Eex 1 and Eex 2 excitonic transitions gets strongest as the polarization is parallel and perpendicular to the b-axis, respectively. The parameters that describe the temperature dependence of the excitonic transition energy and the broadening function are extracted and discussed. We have also performed electrical conductivity and Hall measurements at different temperatures to derive the activation energy (∼95 and 50meV for ReSe 2:Au and ReSe2:Ag, respectively).
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UR - http://www.scopus.com/inward/citedby.url?scp=84880808220&partnerID=8YFLogxK
U2 - 10.7567/JJAP.52.04CH06
DO - 10.7567/JJAP.52.04CH06
M3 - Article
AN - SCOPUS:84880808220
VL - 52
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
SN - 0021-4922
IS - 4 PART 2
M1 - 04CH06
ER -