Coexistence of superconductivity and charge-density wave in the quasi-one-dimensional material HfTe3.
We present the first experimental evidence for metallicity, superconductivity (SC) and the co-existence of charge density waves (CDW) in the quasi-one-dimensional material HfTe3. The existence of such phenomena is a typical characteristic of the transition metal chalcogenides however, without the application of hydrostatic pressure/chemical doping, it is rare for a material to exhibit the co-existence of both states. Materials such as HfTe3can therefore provide us with a unique insight into the relationship between these multiple ordered states. By improving on the original synthesis conditions, we have successfully synthesised single phase HfTe3and confirmed the resultant structure by performing Rietveld refinement. Using low temperature resistivity measurements, we provide the first experimental evidence of SC at ~1.4 K as well as a resistive anomaly indicative of a CDW formation at ~82 K. By the application of hydrostatic-pressure, the resistivity anomaly shifts to higher temperature. The results show that HfTe3is a promising new material to help study the relationship between SC and CDW.
Tokyo University of Science, Department of Applied Physics, Tokyo, 125-8585, Japan.
Saleem J
SJ
Denholme
Tokyo University of Science, Department of Applied Physics, Tokyo, 125-8585, Japan.
Akinori
A
Yukawa
Tokyo University of Science, Department of Applied Physics, Tokyo, 125-8585, Japan.
Kohei
K
Tsumura
University of Yamanashi, Centre for Crystal Science and Technology, Yamanashi, 400-8511, Japan.
Masanori
M
Nagao
Tokyo University of Science, Department of Materials Science and Technology, Tokyo, 125-8585, Japan.
Ryuji
R
Tamura
University of Yamanashi, Centre for Crystal Science and Technology, Yamanashi, 400-8511, Japan.
Satoshi
S
Watauchi
University of Yamanashi, Centre for Crystal Science and Technology, Yamanashi, 400-8511, Japan.
Isao
I
Tanaka
Tokyo University of Science, Department of Applied Physics, Tokyo, 125-8585, Japan.
Hideaki
H
Takayanagi
Tokyo University of Science, Department of Applied Physics, Tokyo, 125-8585, Japan.
Nobuaki
N
Miyakawa