Time reversal symmetry breaking superconductivity

Details Time reversal symmetry breaking superconductivity Time reversal symmetry breaking superconductivity

1998-10-21

arxiv.org/abs/cond-mat/9810281v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures (attached), to be published in Physical Review B

Scientific paper

10.1103/PhysRevB.59.3357

We study time reversal symmetry breaking superconductivity with $\Delta_k = \Delta_{x^2-y^2} (k) +e^{i\theta} \Delta_{\alpha}$ ($\alpha = s$ or $d_{xy}$) symmetries. It is shown that the behavior of such superconductors could be {\em qualitatively} different depending on the minor components ($\alpha$) and its phase at lower temperatures. It is argued that such {\em qualitatively different} behaviors in thermal as well as in angular dependencies could be a {\em source} of consequences in transport and Josephson physics. Orthorhombicity is found to be a strong mechanism for mixed phase (in case of $\alpha = s$). We show that due to electron correlation the order parameter is more like a pure $d_{x^2-y^2}$ symmetry near optimum doping.

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