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29 March 2024
 
  » arxiv » cond-mat/0102410

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High Tc superconductivity at a critical strain and charge density in diborides
A. Bianconi ; N.L. Saini ; D. Di Castro ; S. Agrestini ; G. Campi ; A. Saccone ; S. De Negri ; M. Giovannini M. Colapietro ;
Date 22 Feb 2001
Subject Superconductivity | cond-mat.supr-con
AbstractWe report variation of lattice structure in diborides (AB2) with different A atoms to identify the special case of MgB2 showing high Tc superconductivity. High purity MgB2 (Tc~39 K) has been prepared by direct reaction of the elements and the lattice parameters are measured by x-ray diffraction determining the strain e of the B-B distance. The results show that the superconductivity in these intermetallics appear near a critical point in a two variables (strain and charge density) phase diagram at (ec, rc).
Source arXiv, cond-mat/0102410
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