Spectroscopic evidence for anisotropic s-wave pairing symmetry in MgB2 -: art. no. 012505

被引：61

作者：

Seneor, P ^{[1
]}

Chen, CT

Yeh, NC

Vasquez, RP

Bell, LD

Jung, CU

Park, MS

Kim, HJ

Kang, WN

Lee, SI

机构：

[1] CALTECH, Dept Phys, Pasadena, CA 91125 USA

[2] CALTECH, Jet Prop Lab, Ctr Space Microelect Technol, Pasadena, CA 91109 USA

[3] Pohang Univ Sci & Technol, Natl Creat Res Initiat Ctr Superconduct, Pohang 790784, South Korea

[4] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.65.012505

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Scanning tunneling spectroscopy of superconducting MgB2 (T-c = 39 K) were studied on high-density pellets and c-axis oriented films. The sample surfaces were chemically etched to remove surface carbonated, and hydroxides, and the data were compared with calculated spectra for all symmetry-allowed pairing channels. The pairing potential (Delta(k)) is best described by an anisotropic s-wave pairing model, with Delta(k) = Delta(xy) sin(2)theta(k) +Delta(z) cos(2)theta(k), where theta(k) is the angle relative to the crystalline c-axis, Delta(z) similar to 8.0 meV, and Delta(xy) similar to 5.0 meV.

引用

页码：1 / 4

页数：4

共 32 条

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