Effect of stoichiometry on the superconducting transition temperature in single crystalline 2 H -NbS 2
Physica C: Superconductivity and its Applications, ISSN: 0921-4534, Vol: 538, Page: 27-31
2017
- 10Citations
- 28Captures
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Article Description
Single crystals of 2 H -NbS 2 are prepared by chemical vapor transport method under varying conditions. The residual resistivity ratio (RRR) of the as-grown single crystals is observed to change from 10 to 60, while the superconducting transition temperatures ( Tc ) remain around 6.2 K. Changes in stoichiometry were obtained by annealing in different conditions, resulting in sulfur deficient 2 H -NbS 2−y single crystals. Both Tc and RRR of the annealed samples are found to drop drastically when y increases from 0.05 to 0.10, which is argued to be the effect of enhanced electron scattering caused by the decreased interlayer coupling evidenced by the increase of the c -axis lattice constant after annealing, possibly due to Nb intercalation between layers.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0921453416302878; http://dx.doi.org/10.1016/j.physc.2017.05.003; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85019184481&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0921453416302878; https://dx.doi.org/10.1016/j.physc.2017.05.003
Elsevier BV
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