Tunneling spectroscopy of MgB2 and Li0.5(THF)yHfNCl

T. Ekino; T. Takasaki; T. Muranaka; H. Fujii; J. Akimitsu; S. Yamanaka

doi:10.1016/S0921-4526(02)01801-X

Tunneling spectroscopy of MgB₂ and Li_0.5(THF)_yHfNCl

T. Ekino, T. Takasaki, T. Muranaka, H. Fujii, J. Akimitsu, S. Yamanaka

Research output: Contribution to journal › Conference article › peer-review

36 Citations (Scopus)

Abstract

Break-junction tunneling spectra have been measured on MgB₂ and Li_0.5(THF)_yHfNCl to investigate the nature of the superconducting gap. The observed largest gap values at 4 K are 2Δ = 18-20 and 11-12meV for MgB₂ (T_c = 39 K) and Li_0.5(THF)_yHfNCl (26 K), respectively. These values lead to the similar ratio 2Δ/k_BT_c = 5-6, which is extremely large in comparison with that of the conventional strong-coupling superconductors.

Original language	English
Pages (from-to)	23-25
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	328
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-4526(02)01801-X
Publication status	Published - Apr 2003
Externally published	Yes
Event	T2PAM - Higashi-Hiroshima, Japan Duration: Aug 16 2002 → Aug 19 2002

Keywords

Break junction
Energy gap
Li(THF)HfNCl
MgB
Superconductivity
Tunneling

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/S0921-4526(02)01801-X

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Cite this

@article{01796f66262f4f1fb66020bfecda4a1e,

title = "Tunneling spectroscopy of MgB2 and Li0.5(THF)yHfNCl",

abstract = "Break-junction tunneling spectra have been measured on MgB2 and Li0.5(THF)yHfNCl to investigate the nature of the superconducting gap. The observed largest gap values at 4 K are 2Δ = 18-20 and 11-12meV for MgB2 (Tc = 39 K) and Li0.5(THF)yHfNCl (26 K), respectively. These values lead to the similar ratio 2Δ/kBTc = 5-6, which is extremely large in comparison with that of the conventional strong-coupling superconductors.",

keywords = "Break junction, Energy gap, Li(THF)HfNCl, MgB, Superconductivity, Tunneling",

author = "T. Ekino and T. Takasaki and T. Muranaka and H. Fujii and J. Akimitsu and S. Yamanaka",

note = "Funding Information: This work is supported by a Grant-in-Aid for COE research (No. 13CE2002) of the Ministry of Education, Culture, Sports, Science and Technology of Japan. ; T2PAM ; Conference date: 16-08-2002 Through 19-08-2002",

year = "2003",

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doi = "10.1016/S0921-4526(02)01801-X",

language = "English",

volume = "328",

pages = "23--25",

journal = "Physica B: Condensed Matter",

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TY - JOUR

T1 - Tunneling spectroscopy of MgB2 and Li0.5(THF)yHfNCl

AU - Ekino, T.

AU - Takasaki, T.

AU - Muranaka, T.

AU - Fujii, H.

AU - Akimitsu, J.

AU - Yamanaka, S.

N1 - Funding Information: This work is supported by a Grant-in-Aid for COE research (No. 13CE2002) of the Ministry of Education, Culture, Sports, Science and Technology of Japan.

PY - 2003/4

Y1 - 2003/4

N2 - Break-junction tunneling spectra have been measured on MgB2 and Li0.5(THF)yHfNCl to investigate the nature of the superconducting gap. The observed largest gap values at 4 K are 2Δ = 18-20 and 11-12meV for MgB2 (Tc = 39 K) and Li0.5(THF)yHfNCl (26 K), respectively. These values lead to the similar ratio 2Δ/kBTc = 5-6, which is extremely large in comparison with that of the conventional strong-coupling superconductors.

AB - Break-junction tunneling spectra have been measured on MgB2 and Li0.5(THF)yHfNCl to investigate the nature of the superconducting gap. The observed largest gap values at 4 K are 2Δ = 18-20 and 11-12meV for MgB2 (Tc = 39 K) and Li0.5(THF)yHfNCl (26 K), respectively. These values lead to the similar ratio 2Δ/kBTc = 5-6, which is extremely large in comparison with that of the conventional strong-coupling superconductors.

KW - Break junction

KW - Energy gap

KW - Li(THF)HfNCl

KW - MgB

KW - Superconductivity

KW - Tunneling

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DO - 10.1016/S0921-4526(02)01801-X

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EP - 25

JO - Physica B: Condensed Matter

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