Effect of stoichiometry on the superconducting transition temperature in single crystalline 2H-NbS2

Hailong Lian; Yueshen Wu; Hui Xing; Shun Wang; Ying Liu

doi:10.1016/j.physc.2017.05.003

Effect of stoichiometry on the superconducting transition temperature in single crystalline 2H-NbS₂

Hailong Lian, Yueshen Wu, Hui Xing, Shun Wang, Ying Liu

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Single crystals of 2H-NbS₂ 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 (T_c) remain around 6.2 K. Changes in stoichiometry were obtained by annealing in different conditions, resulting in sulfur deficient 2H-NbS2−y single crystals. Both T_c 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.

Original language	English (US)
Pages (from-to)	27-31
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	538
DOIs	https://doi.org/10.1016/j.physc.2017.05.003
State	Published - Jul 15 2017

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2017.05.003

Fingerprint Dive into the research topics of 'Effect of stoichiometry on the superconducting transition temperature in single crystalline 2H-NbS<sub>2</sub>'. Together they form a unique fingerprint.

Cite this

@article{05116f42bebd497b9efe61b7d61e9955,

title = "Effect of stoichiometry on the superconducting transition temperature in single crystalline 2H-NbS2",

abstract = "Single crystals of 2H-NbS2 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 2H-NbS2−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.",

author = "Hailong Lian and Yueshen Wu and Hui Xing and Shun Wang and Ying Liu",

note = "Funding Information: The work is supported by National Natural Science Foundation of China (Grant Nos.11274229, 11474198, 91421304) and by MOST of China (Grant Nos. 2015CB921104 and 2014CB921201). Y. L. acknowledges the support in the US by NSF under Grant No. EFMA1433378. Publisher Copyright: {\textcopyright} 2017",

year = "2017",

month = jul,

day = "15",

doi = "10.1016/j.physc.2017.05.003",

language = "English (US)",

volume = "538",

pages = "27--31",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

}

TY - JOUR

T1 - Effect of stoichiometry on the superconducting transition temperature in single crystalline 2H-NbS2

AU - Lian, Hailong

AU - Wu, Yueshen

AU - Xing, Hui

AU - Wang, Shun

AU - Liu, Ying

N1 - Funding Information: The work is supported by National Natural Science Foundation of China (Grant Nos.11274229, 11474198, 91421304) and by MOST of China (Grant Nos. 2015CB921104 and 2014CB921201). Y. L. acknowledges the support in the US by NSF under Grant No. EFMA1433378. Publisher Copyright: © 2017

PY - 2017/7/15

Y1 - 2017/7/15

N2 - Single crystals of 2H-NbS2 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 2H-NbS2−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.

AB - Single crystals of 2H-NbS2 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 2H-NbS2−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.

UR - http://www.scopus.com/inward/record.url?scp=85019184481&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85019184481&partnerID=8YFLogxK

U2 - 10.1016/j.physc.2017.05.003

DO - 10.1016/j.physc.2017.05.003

M3 - Article

AN - SCOPUS:85019184481

VL - 538

SP - 27

EP - 31

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534