Phonon contribution to the transport properties of single-crystal MgB2

T. Masui; K. Yoshida; S. Lee; A. Yamamoto; S. Tajima

Phonon contribution to the transport properties of single-crystal MgB₂

T. Masui, K. Yoshida, S. Lee, A. Yamamoto, S. Tajima

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

Abstract

We extract phonon contributions from the transport properties of a MgB₂ single crystal. The temperature dependence of the in-plane resistivity is well explained by the Bloch-Grüneisen formula with the Debye temperature θ_D∼400 K, taking into account an additional contribution of the E_2g phonon mode (∼890 K). In the thermoelectric power, we find a phonon drag peak around 70 K, which gives a consistent estimation of θ_D with the resistivity result. The pressure dependence of the in-plane resistivity reveals a major contribution of the E_2g phonon mode to superconductivity.

Original language	English
Article number	214513
Pages (from-to)	2145131-2145134
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	65
Issue number	21
Publication status	Published - 2002 Jun 1
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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abstract = "We extract phonon contributions from the transport properties of a MgB2 single crystal. The temperature dependence of the in-plane resistivity is well explained by the Bloch-Gr{\"u}neisen formula with the Debye temperature θD∼400 K, taking into account an additional contribution of the E2g phonon mode (∼890 K). In the thermoelectric power, we find a phonon drag peak around 70 K, which gives a consistent estimation of θD with the resistivity result. The pressure dependence of the in-plane resistivity reveals a major contribution of the E2g phonon mode to superconductivity.",

author = "T. Masui and K. Yoshida and S. Lee and A. Yamamoto and S. Tajima",

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T1 - Phonon contribution to the transport properties of single-crystal MgB2

AU - Masui, T.

AU - Yoshida, K.

AU - Lee, S.

AU - Yamamoto, A.

AU - Tajima, S.

PY - 2002/6/1

Y1 - 2002/6/1

N2 - We extract phonon contributions from the transport properties of a MgB2 single crystal. The temperature dependence of the in-plane resistivity is well explained by the Bloch-Grüneisen formula with the Debye temperature θD∼400 K, taking into account an additional contribution of the E2g phonon mode (∼890 K). In the thermoelectric power, we find a phonon drag peak around 70 K, which gives a consistent estimation of θD with the resistivity result. The pressure dependence of the in-plane resistivity reveals a major contribution of the E2g phonon mode to superconductivity.

AB - We extract phonon contributions from the transport properties of a MgB2 single crystal. The temperature dependence of the in-plane resistivity is well explained by the Bloch-Grüneisen formula with the Debye temperature θD∼400 K, taking into account an additional contribution of the E2g phonon mode (∼890 K). In the thermoelectric power, we find a phonon drag peak around 70 K, which gives a consistent estimation of θD with the resistivity result. The pressure dependence of the in-plane resistivity reveals a major contribution of the E2g phonon mode to superconductivity.

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JF - Physical Review B-Condensed Matter

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