The effect of Sn intercalation on the superconducting properties of 2H-NbSe2

被引：15

作者：

Naik, Subham ^{[1
]}

Pradhan, Gopal K. ^{[2
,3
]}

Bhat, Shwetha G. ^{[4
]}

Behera, Bhaskar Chandra ^{[2
]}

Kumar, P. S. Anil ^{[4
]}

Samal, Saroj L. ^{[1
]}

Samal, D. ^{[2
,5
]}

机构：

[1] NIT Rourkela, Dept Chem, Rourkela 769008, Odisha, India

[2] Inst Phys, Bhubaneswar 751005, India

[3] KIIT Deemed Univ, Sch Appl Sci, Dept Phys, Bhubaneswar 751024, Odisha, India

[4] IISc Bangalore, Dept Phys, Bangalore, Karnataka, India

[5] Homi Bhabha Natl Inst, Mumbai 400085, Maharashtra, India

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2019年 / 561卷

关键词：

Transition metal dichalcogenide; Intercalation; Upper Critical Field; WHH formalism; Raman scattering; CDW; Magnetotransport; TRANSITION; SCATTERING; STATE;

D O I：

10.1016/j.physc.2019.02.011

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

2H-NbSe2 is known to be an archetype layered transitional metal dichalcogenide superconductor with a superconducting transition temperature of 7.3 K. In this article, we investigate the influence of Sn intercalation on superconducting properties of 2H-NbSe2. Sn being nonmagnetic and having no outer shell d-electrons unlike transition metals, one naively would presume that its effect on superconducting properties will be very marginal. However, our magnetic and transport studies reveal a significant reduction of both superconducting transition temperature and upper critical field [T-c and B-c2 (0)] upon Sn intercalation. With a mere 4 mole% Sn intercalation, it is observed that T-c and B-c2 (0) get suppressed by 3.5 K and 3 T, respectively. Werthamer-HelfandHohenberg (WHH) analysis of magneto-transport data is performed to estimate B-c2 (0). From the low temperature Raman scattering data in the normal phase of intercalated 2H-NbSe2, it is inferred that the suppression of superconductivity cannot be ascribed to strengthening of charge density wave (CDW) ordering. Rather, the weakening of superconductivity is attributed to the observed increase of c-axis lattice parameter and the possible changes in the Fermi surface upon Sn intercalation.

引用

页码：18 / 23

页数：6

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