A low-T c superconducting modification of Th4H15 synthesized under high pressure
- 18 January 2021
- journal article
- research article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 34 (3), 034006
- https://doi.org/10.1088/1361-6668/abdcc2
Abstract
Among the metal hydrides, Th4H15 is the first reported superconductor with a relatively high Tc ~ 8 K at ambient pressure. Here we report on the synthesis and characterization of a low-Tc superconducting modification of Th4H15, which is obtained via hydrogenating Th metal at 5 GPa and 800 C by using the ammonia borane (BH3NH3) as the hydrogen source. Measurements of resistivity, magnetic susceptibility, and specific heat confirm that the obtained Th4H15 sample shows a bulk superconducting transition at Tc ~ 6 K, which is about 2 K lower than that reported previously. Various characteristic superconducting parameters have been extracted for this compound and unusual lattice dynamics were evidenced from the specific-heat analysis.Funding Information
- Beijing Natural Science Foundation (Z190008)
- National Natural Science Foundation of China (12025408)
This publication has 55 references indexed in Scilit:
- Superconductivity in sodalite-like yttrium hydride clathratesPhysical Review B, 2019
- Superconductivity at 250 K in lanthanum hydride under high pressuresNature, 2019
- Viewpoint: the road to room-temperature conventional superconductivityJournal of Physics: Condensed Matter, 2019
- Dynamics and superconductivity in compressed lanthanum superhydridePhysical Review B, 2018
- Synthesis and Stability of Lanthanum SuperhydridesAngewandte Chemie, 2017
- Hydrogen Clathrate Structures in Rare Earth Hydrides at High Pressures: Possible Route to Room-Temperature SuperconductivityPhysical Review Letters, 2017
- Crystal structure of the superconducting phase of sulfur hydrideNature Physics, 2016
- Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride systemNature, 2015
- Pressure-induced metallization of dense (H2S)2H2 with high-Tc superconductivityScientific Reports, 2014
- Hydrogen Dominant Metallic Alloys: High Temperature Superconductors?Physical Review Letters, 2004