Effect of hydrogen on the electrical resistance of NbSe2 in a wide temperature range

A Chroneos,V I Biletskyi,R V Vovk,M V Kislitsa,G Ya Khadzhai

doi:10.1007/s10854-021-05934-2

Abstract

The electrical resistivity of niobium diselenide (NbSe2) with hydrogen was investigated in the temperature range Tc – 300 K. It was determined that hydrogen inhibits the formation of a charge density wave. It was shown that hydride phase with niobium is formed due to hydrogen in NbSe2 layers at low temperatures, which decomposes with increasing temperature to form a solid solution. The temperature dependence of the resistivity is approximated by the Bloch–Grüneisen function. The approximation parameters vary depending on the amount of dissolved hydrogen.

Highlights

Anisotropic quasi-two-dimensional conducting compounds represent a large class of solids with unique physical properties [1,2,3]
3) There are no signs of charge density wave (CDW) formation in the hydrogenated state, which manifested themselves as a peak in the derivative in the region of 30 K on a pure sample, which is consistent with the literature data [22]
Hydrogen suppresses the formation of a charge density wave, the presence of which is evident from the peak of the derivative of the resistivity pure NbSe2 in the region of 30 K [22]

Summary

Introduction

Anisotropic quasi-two-dimensional conducting compounds represent a large class of solids with unique physical properties [1,2,3]. These compounds include transition metal dichalcogenides (TMDs) [4, 5] and cuprate HTS (high-temperature superconductors) [6, 7], the best known representatives of which are layered single crystals of ReBa2Cu3O7-d (Re = Y or other rare earth ion) [8,9,10] and NbSe2 [11, 12]. In the absence of a microscopic theory of hightemperature superconductivity [19], experimental methods are of particular importance, allowing one to reveal those structural parameters of superconductors that most significantly affect their critical characteristics (critical temperature and field), since this allows the determination of possible ways to increase their electric transport characteristics (current density)

Objectives

Results

Conclusion