Influence of Al doping on the gap values in MgB2 single crystals

Thierry Klein; Zuzana Holanova; Christophe Marcenat; Laurence Lyard; Jacques Marcus; Pavol Szabo; Peter Samuely; Sung Ik Lee

doi:10.1016/j.physc.2007.04.102

Influence of Al doping on the gap values in MgB₂ single crystals

Thierry Klein, Zuzana Holanova, Christophe Marcenat, Laurence Lyard, Jacques Marcus, Pavol Szabo, Peter Samuely, Sung Ik Lee

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

Abstract

We report on the evolution of the small and large gap values in Mg_1-xAl_xB₂ single crystals (for x = 0, 0.1 and ∼0.2) by specific heat and point contact spectroscopy. The values deduced from the temperature dependence of the electronic contribution to the specific heat are very close to those obtained by point contact spectroscopy. The evolution of those gaps with Al concentration suggests that both band filling and interband scattering effects are present and may lead to a merging of the two gaps for T_c ∼ 10-15 K.

Original language	English
Pages (from-to)	562-563
Number of pages	2
Journal	Physica C: Superconductivity and its Applications
Volume	460-462 I
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2007.04.102
Publication status	Published - 1 Sept 2007
Externally published	Yes

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10.1016/j.physc.2007.04.102

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title = "Influence of Al doping on the gap values in MgB2 single crystals",

abstract = "We report on the evolution of the small and large gap values in Mg1-xAlxB2 single crystals (for x = 0, 0.1 and ∼0.2) by specific heat and point contact spectroscopy. The values deduced from the temperature dependence of the electronic contribution to the specific heat are very close to those obtained by point contact spectroscopy. The evolution of those gaps with Al concentration suggests that both band filling and interband scattering effects are present and may lead to a merging of the two gaps for Tc ∼ 10-15 K.",

author = "Thierry Klein and Zuzana Holanova and Christophe Marcenat and Laurence Lyard and Jacques Marcus and Pavol Szabo and Peter Samuely and Lee, \{Sung Ik\}",

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doi = "10.1016/j.physc.2007.04.102",

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T1 - Influence of Al doping on the gap values in MgB2 single crystals

AU - Klein, Thierry

AU - Holanova, Zuzana

AU - Marcenat, Christophe

AU - Lyard, Laurence

AU - Marcus, Jacques

AU - Szabo, Pavol

AU - Samuely, Peter

AU - Lee, Sung Ik

PY - 2007/9/1

Y1 - 2007/9/1

N2 - We report on the evolution of the small and large gap values in Mg1-xAlxB2 single crystals (for x = 0, 0.1 and ∼0.2) by specific heat and point contact spectroscopy. The values deduced from the temperature dependence of the electronic contribution to the specific heat are very close to those obtained by point contact spectroscopy. The evolution of those gaps with Al concentration suggests that both band filling and interband scattering effects are present and may lead to a merging of the two gaps for Tc ∼ 10-15 K.

AB - We report on the evolution of the small and large gap values in Mg1-xAlxB2 single crystals (for x = 0, 0.1 and ∼0.2) by specific heat and point contact spectroscopy. The values deduced from the temperature dependence of the electronic contribution to the specific heat are very close to those obtained by point contact spectroscopy. The evolution of those gaps with Al concentration suggests that both band filling and interband scattering effects are present and may lead to a merging of the two gaps for Tc ∼ 10-15 K.

U2 - 10.1016/j.physc.2007.04.102

DO - 10.1016/j.physc.2007.04.102

M3 - Article

AN - SCOPUS:34548172236

SN - 0921-4534

VL - 460-462 I

SP - 562

EP - 563

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - SPEC. ISS.

ER -

Influence of Al doping on the gap values in MgB2 single crystals

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Influence of Al doping on the gap values in MgB₂ single crystals