Thermoelectric power and its correlation with conductivity in Nb S3 whiskers
Journal
Physical Review B
Journal Volume
99
Journal Issue
23
Pages
235155-1 - 235155-17
Date Issued
2019
Author(s)
Zybtsev, S.G.
Pokrovskii, V.Y.
Nasretdinova, V.F.
Zaitsev-Zotov, S.V.
Pryadun, V.V.
Kozlyakova, E.S.
Volkova, O.S.
Vasiliev, A.N.
Starešinić, D.
Abstract
We report studies of the Seebeck coefficient S of the quasi-one-dimensional compound NbS3, together with the temperature dependence of its specific conductivity σs and heat capacity cp. The monoclinic phase (NbS3-II) is studied over the temperature range T=80-400 K, which covers two charge density wave (CDW) transitions at TP1=360 K (CDW-1) and TP2=150 K (CDW-2). The S(T) curves show features in the vicinities of both CDW transitions and appear to be correlated with the value of σs(300K): The increase of S below TP1 in the high-Ohmic samples reveals a complete dielectrization of the electronic spectrum, while in the low-Ohmic samples S decreases below TP1 and even becomes negative below TP2. The magnitude of S in low-Ohmic samples at T
Publisher
American Physical Society
Type
journal article