Electronic structure of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">MgB</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow><mo>:</mo></math></span> X-ray emission and absorption studies

E. Z. Kurmaev; I. I. Lyakhovskaya; J. Kortus; A. Moewes; N. Miyata; M. Demeter; M. Neumann; M. Yanagihara; M. Watanabe; T. Muranaka; J. Akimitsu

doi:10.1103/PhysRevB.65.134509

Electronic structure of ${MgB}_{2} :$ X-ray emission and absorption studies

E. Z. Kurmaev, I. I. Lyakhovskaya, J. Kortus, A. Moewes, N. Miyata, M. Demeter, M. Neumann, M. Yanagihara, M. Watanabe, T. Muranaka, and J. Akimitsu

Phys. Rev. B 65, 134509 – Published 19 March 2002

Abstract

Measurements of x-ray emission and absorption spectra of the constituents of ${MgB}_{2}$ are presented. The results obtained are in good agreement with calculated x-ray spectra, with dipole matrix elements taken into account. The comparison of x-ray emission spectra of graphite, ${AlB}_{2},$ and ${MgB}_{2}$ in the binding energy scale supports the idea of charge transfer from $σ$ to $π$ bands, which creates holes at the top of the bonding $σ$ bands and drives the high- $T_{c}$ superconductivity in ${MgB}_{2} .$

Received 28 August 2001

DOI:https://doi.org/10.1103/PhysRevB.65.134509

Authors & Affiliations

E. Z. Kurmaev¹, I. I. Lyakhovskaya², J. Kortus³, A. Moewes⁴, N. Miyata⁵, M. Demeter⁶, M. Neumann⁶, M. Yanagihara⁵, M. Watanabe⁵, T. Muranaka⁷, and J. Akimitsu⁷

¹Institute of Metal Physics, Russian Academy of Sciences-Ural Division, 620219 Yekaterinburg, Russia
²Institute of Physics, St. Petersburg State University, 198504 St. Petersburg, Russia
³Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart, Germany
⁴Department of Physics and Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon, Saskatchewan, Canada S7N5E2
⁵Research Institute for Scientific Measurements, Tohoku University, Sendai 980-8577, Japan
⁶University of Osnabrück, Sektion of Physik, D-49069 Osnabrück, Germany
⁷Department of Physics, Aoyama-Gakuin University, Tokyo 157-8572, Japan

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Vol. 65, Iss. 13 — 1 April 2002

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