Spectroscopic evidence for anisotropic s-wave pairing symmetry in MgB2

P. Seneor; C. T. Chen; N. C. Yeh; R. P. Vasquez; L. D. Bell; C. U. Jung; Min Seok Park; Heon Jung Kim; W. N. Kang; Sung Ik Lee

Spectroscopic evidence for anisotropic s-wave pairing symmetry in MgB₂

P. Seneor
, C. T. Chen
, N. C. Yeh
, R. P. Vasquez
, L. D. Bell
, C. U. Jung
, Min Seok Park
, Heon Jung Kim
, W. N. Kang
, Sung Ik Lee

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

Abstract

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 carbonates and hydroxides, and the data were compared with calculated spectra for all symmetry-allowed pairing channels. The pairing potential (Δ_k) is best described by an anisotropic s-wave pairing model, with Δ_k=Δ_xy sin²θ_k +Δ_z cos²θ_k, where θ_k is the angle relative to the crystalline c-axis, Δ_z∼8.0 meV, and Δ_xy∼5.0 meV.

Original language	English
Article number	012505
Pages (from-to)	125051-125054
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	65
Issue number	1
State	Published - 1 Jan 2002
Externally published	Yes

Cite this

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title = "Spectroscopic evidence for anisotropic s-wave pairing symmetry in MgB2",

abstract = "Scanning tunneling spectroscopy of superconducting MgB2 (Tc=39 K) were studied on high-density pellets and c-axis oriented films. The sample surfaces were chemically etched to remove surface carbonates and hydroxides, and the data were compared with calculated spectra for all symmetry-allowed pairing channels. The pairing potential (Δk) is best described by an anisotropic s-wave pairing model, with Δk=Δxy sin2θk +Δz cos2θk, where θk is the angle relative to the crystalline c-axis, Δz∼8.0 meV, and Δxy∼5.0 meV.",

author = "P. Seneor and Chen, \{C. T.\} and Yeh, \{N. C.\} and Vasquez, \{R. P.\} and Bell, \{L. D.\} and Jung, \{C. U.\} and Park, \{Min Seok\} and Kim, \{Heon Jung\} and Kang, \{W. N.\} and Lee, \{Sung Ik\}",

year = "2002",

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language = "English",

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TY - JOUR

T1 - Spectroscopic evidence for anisotropic s-wave pairing symmetry in MgB2

AU - Seneor, P.

AU - Chen, C. T.

AU - Yeh, N. C.

AU - Vasquez, R. P.

AU - Bell, L. D.

AU - Jung, C. U.

AU - Park, Min Seok

AU - Kim, Heon Jung

AU - Kang, W. N.

AU - Lee, Sung Ik

PY - 2002/1/1

Y1 - 2002/1/1

N2 - Scanning tunneling spectroscopy of superconducting MgB2 (Tc=39 K) were studied on high-density pellets and c-axis oriented films. The sample surfaces were chemically etched to remove surface carbonates and hydroxides, and the data were compared with calculated spectra for all symmetry-allowed pairing channels. The pairing potential (Δk) is best described by an anisotropic s-wave pairing model, with Δk=Δxy sin2θk +Δz cos2θk, where θk is the angle relative to the crystalline c-axis, Δz∼8.0 meV, and Δxy∼5.0 meV.

AB - Scanning tunneling spectroscopy of superconducting MgB2 (Tc=39 K) were studied on high-density pellets and c-axis oriented films. The sample surfaces were chemically etched to remove surface carbonates and hydroxides, and the data were compared with calculated spectra for all symmetry-allowed pairing channels. The pairing potential (Δk) is best described by an anisotropic s-wave pairing model, with Δk=Δxy sin2θk +Δz cos2θk, where θk is the angle relative to the crystalline c-axis, Δz∼8.0 meV, and Δxy∼5.0 meV.

UR - https://www.scopus.com/pages/publications/0000781240

M3 - Article

AN - SCOPUS:0000781240

SN - 1098-0121

VL - 65

SP - 125051

EP - 125054

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 1

M1 - 012505

ER -

Spectroscopic evidence for anisotropic s-wave pairing symmetry in MgB₂

Abstract

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