Pressure dependence of superconducting critical temperature and upper critical field of 2H-NbS2

被引：74

作者：

Tissen, V. G. ^{[1
,2
]}

Osorio, M. R. ^{[2
]}

Brison, J. P. ^{[3
]}

Nemes, N. M. ^{[4
]}

Garcia-Hernandez, M. ^{[5
,6
]}

Cario, L. ^{[7
]}

Rodiere, P. ^{[8
]}

Vieira, S. ^{[2
]}

Suderow, H. ^{[2
,6
]}

机构：

[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow Region, Russia

[2] Univ Autonoma Madrid, Fac Ciencias, Inst Ciencia Mat Nicolas Cabrera, Dept Fis Mat Condensada,Lab Bajas Temp, ES-28049 Madrid, Spain

[3] CNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble 9, France

[4] Univ Complutense Madrid, Dept Fis Aplicada 3, GFMC, ES-28040 Madrid, Spain

[5] CSIC, Inst Ciencia Mat Madrid, ES-28049 Madrid, Spain

[6] UAM CSIC, Unidad Asociada Bajas Temp & Altos Campos Magnet, ES-28049 Madrid, Spain

[7] Univ Nantes, CNRS, Inst Mat Jean Rouxel IMN, F-44322 Nantes 03, France

[8] CRS UJF, Inst Neel, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 13期

关键词：

CHARGE-DENSITY WAVES; TRANSITION; ORDER; ANISOTROPY; CRYSTALS; STM;

D O I：

10.1103/PhysRevB.87.134502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present measurements of the superconducting critical temperature T-c and upper critical field H-c2 as a function of pressure in the transition metal dichalcogenide 2H-NbS2 up to 20 GPa. We observe that Tc increases smoothly from 6 K at ambient pressure to about 8.9 K at 20 GPa. This range of increase is comparable to the one found previously in 2H-NbSe2. The temperature dependence of the upper critical field H-c2(T) of 2H-NbS2 varies considerably when increasing the pressure. At low pressures, H-c2(0) decreases, and at higher pressures both T-c and H-c2(0) increase simultaneously. This points out that there are pressure induced changes of the Fermi surface, which we analyze in terms of a simplified two-band approach. DOI: 10.1103/ PhysRevB. 87.134502

引用

页数：6

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