STM/STS measurements of the layered superconductor β-HfNCl1-x

被引：3

作者：

Ekino, Toshikazu ^{[1
]}

Sugimoto, Akira ^{[1
]}

Shohara, Kazuhiro ^{[1
]}

Yamanaka, Shoji ^{[2
]}

Gabovich, Alexander M. ^{[3
]}

机构：

[1] Hiroshima Univ, Grad Sch Integrated Arts & Sci, Higashihiroshima 7398521, Japan

[2] Hiroshima Univ, Grad Sch Engn, Higashihiroshima 7398527, Japan

[3] Natl Acad Sci, Inst Phys, UA-03680 Kiev, Ukraine

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2010年 / 470卷

关键词：

STM/STS; Energy gap; Break-junction tunneling; beta-HfNCl1-x; ZR; HF;

D O I：

10.1016/j.physc.2010.01.061

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Scanning tunneling microcopy/spectroscopy (STM/STS) measurements have been carried out on SmSl (beta) type HfNCl1-x (x approximate to 0.3) samples with T-c = 24 K. The STM image on the cleaved surface of ab plane at 5 K clearly reveals a triangular arrangement of bright spots. The separation of the nearest-neighbor spots, 0.369 nm, is in agreement with the a lattice parameter. The STS measurements at 5 K reveal almost constant gap values 2 Delta = 20 meV within the area of at least 10 x 10 nm(2), thus demonstrating a huge ratio 2 Delta/k(B)T(c) = 10. This ratio is very similar to that found in high-T-c oxide and organic superconductors. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：S725 / S727

页数：3

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