Electron tunneling spectroscopy of the phonon spectrum of MgB2

被引：2

作者：

Tarenkov, V. Yu. ^{[1
]}

D'yachenko, A. I. ^{[1
]}

Sidorov, S. L. ^{[1
]}

Boichenko, V. A. ^{[1
]}

Boichenko, D. I. ^{[1
]}

Chromik, S. ^{[2
]}

Strbik, V. ^{[2
]}

Gazi, S. ^{[2
]}

Spankova, M. ^{[2
]}

Benacka, S. ^{[2
]}

机构：

[1] Natl Acad Sci Ukraine, Donetsk Inst Phys & Engn, UA-83114 Donetsk, Ukraine

[2] Slovak Acad Sci, Inst Elect Engn, SK-84239 Bratislava, Slovakia

来源：

PHYSICS OF THE SOLID STATE | 2009年 / 51卷 / 09期

关键词：

RAMAN-SCATTERING; SUPERCONDUCTIVITY;

D O I：

10.1134/S1063783409090030

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The specific features of the phonon spectrum of the MgB2 compound (T (c) = 38 K) are investigated by tunneling spectroscopy. It is demonstrated that both the position and the energy width of the fundamental optical mode E (2g) in the phonon spectrum are in good agreement with inelastic X-ray spectroscopy data but differ substantially from Raman spectroscopy results. Among possible factors responsible for this discrepancy, the anharmonic and nonadiabatic effects that are characteristic of the MgB2 system are discussed.

引用

页码：1778 / 1784

页数：7

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