Details
| Original language | English |
|---|---|
| Pages (from-to) | 8011-8023 |
| Number of pages | 13 |
| Journal | Journal of Physics Condensed Matter |
| Volume | 14 |
| Issue number | 34 |
| Early online date | 15 Aug 2002 |
| Publication status | Published - 2 Sept 2002 |
Abstract
The in-plane electrical transport and optical properties of the incommensurate intergrowth compounds (SbS)1.15(TiS2)n with n = 1, 2 have been investigated by means of measurements of the electrical resistivity, Hall coefficient and thermopower in the temperature range from 4.2 to 350 K, and by optical spectroscopy in the frequency range 1000-20000 cm-1 at room temperature. Both the Hall effect and the thermopower indicate transport by electrons. The Hall coefficients show electron donation of about 0.57 and 0.34 of an electron per Ti atom for (SbS)1.15(TiS2)n with n = 1 and 2, respectively. The in-plane resistivity ρab(T) exhibits a non-linear dependence on temperature, which can be described with the formula ρab(T) = ρ0 + Aee(T/TF)2 In(TF/T) as for a two-dimensional Fermi liquid. Fits according to the Drude model to the room temperature optical reflectivity show that the relaxation rate has a quadratic variation with frequency 1/τ(ω) ∼ ω2, also indicating Fermi-liquid behaviour with interelectronic collisions of quasiparticles. Only a small anisotropy in the ab-plane is observed in the optical spectra for the electrical field polarized parallel and perpendicular to the incommensurate direction.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Journal of Physics Condensed Matter, Vol. 14, No. 34, 02.09.2002, p. 8011-8023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Electrical transport and optical properties of the incommensurate intergrowth compounds (SbS)1.15(TiS2)n with n = 1 and 2
AU - Ren, Y.
AU - Rüscher, C. H.
AU - Haas, C.
AU - Wiegers, G. A.
PY - 2002/9/2
Y1 - 2002/9/2
N2 - The in-plane electrical transport and optical properties of the incommensurate intergrowth compounds (SbS)1.15(TiS2)n with n = 1, 2 have been investigated by means of measurements of the electrical resistivity, Hall coefficient and thermopower in the temperature range from 4.2 to 350 K, and by optical spectroscopy in the frequency range 1000-20000 cm-1 at room temperature. Both the Hall effect and the thermopower indicate transport by electrons. The Hall coefficients show electron donation of about 0.57 and 0.34 of an electron per Ti atom for (SbS)1.15(TiS2)n with n = 1 and 2, respectively. The in-plane resistivity ρab(T) exhibits a non-linear dependence on temperature, which can be described with the formula ρab(T) = ρ0 + Aee(T/TF)2 In(TF/T) as for a two-dimensional Fermi liquid. Fits according to the Drude model to the room temperature optical reflectivity show that the relaxation rate has a quadratic variation with frequency 1/τ(ω) ∼ ω2, also indicating Fermi-liquid behaviour with interelectronic collisions of quasiparticles. Only a small anisotropy in the ab-plane is observed in the optical spectra for the electrical field polarized parallel and perpendicular to the incommensurate direction.
AB - The in-plane electrical transport and optical properties of the incommensurate intergrowth compounds (SbS)1.15(TiS2)n with n = 1, 2 have been investigated by means of measurements of the electrical resistivity, Hall coefficient and thermopower in the temperature range from 4.2 to 350 K, and by optical spectroscopy in the frequency range 1000-20000 cm-1 at room temperature. Both the Hall effect and the thermopower indicate transport by electrons. The Hall coefficients show electron donation of about 0.57 and 0.34 of an electron per Ti atom for (SbS)1.15(TiS2)n with n = 1 and 2, respectively. The in-plane resistivity ρab(T) exhibits a non-linear dependence on temperature, which can be described with the formula ρab(T) = ρ0 + Aee(T/TF)2 In(TF/T) as for a two-dimensional Fermi liquid. Fits according to the Drude model to the room temperature optical reflectivity show that the relaxation rate has a quadratic variation with frequency 1/τ(ω) ∼ ω2, also indicating Fermi-liquid behaviour with interelectronic collisions of quasiparticles. Only a small anisotropy in the ab-plane is observed in the optical spectra for the electrical field polarized parallel and perpendicular to the incommensurate direction.
UR - http://www.scopus.com/inward/record.url?scp=0037009036&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/14/34/320
DO - 10.1088/0953-8984/14/34/320
M3 - Article
AN - SCOPUS:0037009036
VL - 14
SP - 8011
EP - 8023
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 34
ER -