Vibrational spectroscopy of superconducting MgB2 by neutron inelastic scattering

被引：18

作者：

Muranaka, T

Margadonna, S

Maurin, I

Brigatti, K

Colognesi, D

Prassides, K

Iwasa, Y

Arai, M

Takata, M

Akimitsu, J

机构：

[1] Aoyama Gakuin Univ, Dept Phys, Setagaya Ku, Tokyo 1578572, Japan

[2] Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England

[3] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

[4] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[5] NCSR Demokritos, Inst Mat Sci, GR-15310 Athens, Greece

[6] Japan Adv Inst Sci & Technol, Tatsunokuchi, Ishikawa 9231292, Japan

[7] Inst Mat Struct Sci, KEK, Tsukuba, Ibaraki 3050801, Japan

[8] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

[9] Japan Sci & Technol Corp, JST, CREST, Tokyo, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2001年 / 70卷 / 06期

关键词：

MgB2; superconductivity; neutron inelastic scattering; phonon density of states; electron-phonon coupling;

D O I：

10.1143/JPSJ.70.1480

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Neutron inelastic scattering measurements have been performed on superconducting MgB2 above and below T,. The temperature dependence of the generalized phonon density-of-states showed clear anomalous behaviour near 24 meV in the acoustic phonon region, which may be interpreted as evidence of a substantial contribution to the total electron-phonon coupling strength deriving from these phonons. Weaker evidence for a corresponding response in the high-energy B bond stretching phonons was also encountered.

引用

页码：1480 / 1482

页数：3

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