X-RAY ABSORPTION STUDY OF Mg1-xAlxB2 AT B K-EDGE-Reference-Cited by-同舟云学术

X-RAY ABSORPTION STUDY OF Mg1-xAlxB2 AT B K-EDGE

Published:2002-05-20 Issue:11n12 Volume:16 Page:1619-1626
ISSN:0217-9792
Container-title:International Journal of Modern Physics B
language:en
Short-container-title:Int. J. Mod. Phys. B

Author:

TSUEI K.-D.¹²,LIN H.-J.¹,LIN L.-C.³,HOU T.-Y.¹,HSIEH H.-H.¹,CHEN C. T.¹,SAINI N. L.⁴,BIANCONI A.⁴,SACCONE A.⁵

Affiliation:

1. Synchrotron Radiation Research Center, Hsinchu, 300 Taiwan, R.O.C

2. Department of Physics, National Tsing-Hua University, Hsinchu, 300 Taiwan, R.O.C

3. Department of Physics, National Tsing-Hua University, Hsinchu, 300 Taiwan, R.O.C

4. INFM Unit and Dipartimento di Fisica Universita' di Roma "La Sapienza", Roma, Italy

5. Dipartimento di Chinica e Chimica Industriale, Universita' di Genova, Genova, Italy

Abstract

We have measured B K-edge X-ray absorption spectra of Mg 1-x Al x B 2 (x=0.0 ~ 0.4) using bulk-sensitive total fluorescence yield (TFY) at room temperature and 30 K. In contrast to previous reports no peaks near 192 eV and 194 eV could be observed after repeated scraping, indicating their origin being due to surface contamination. These clean spectra show a peak right above the absorption threshold, anticipated from transition to the unoccupied B 2p states. Except in the intermediate Al doping range of x ~ 0.1 to 0.28 the threshold peak intensity decreases, consistent with pσ-hole filling. The increase of peak intensity in the intermediate range is correlated with structural phase transition.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0217979202011433

Reference20 articles.

1. Superconductivity of Metallic Boron inMgB2

2. Superconductivity ofMgB2: Covalent Bonds Driven Metallic

3. Boron Isotope Effect in SuperconductingMgB2

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