Time reversal symmetry breaking superconductivity

Abstract

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.

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

References in corpus (2)

• Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
• Complex order parameter symmetry and thermal conductivity

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