Effect of boron dimers on the superconducting critical temperature in boron-doped diamond

Details Effect of boron dimers on the superconducting critical temperature in boron-doped diamond Effect of boron dimers on the superconducting critical temperature in boron-doped diamond

2010-11-26

arxiv.org/abs/1011.5824v2

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1016/j.diamond.2011.10.017

We study how attractive boron correlations in boron-doped diamond affect the superconducting critical temperature. The critical temperature is obtained from the McMillan formula for strong coupling superconductors with the density of states evaluated in the dynamical cluster approximation. Numerical results for the cluster of $2\times 2\times 2$ atoms show that attractive correlations lower the density of states at the Fermi level. We argue that this might explain experimentally observed differences in critical temperatures of 100 and 111 oriented films.

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