Clapping modes in unconventional superconductors

Abstract

We consider a superconducting state with a mixed symmetry order parameter components, e.g. $d+is$ or $d+i{d}^{\prime }$ with $d^{\prime }=d_{xy}$. We argue for the existence of the new orbital magnetization mode which corresponds to the oscillations of relative phase $\varphi$ between two components around an equilibrium value of $\varphi =\frac{\pi }{2}$. It is similar to the so called ``clapping'' mode in superfluid ${}^{3}He-A$. We estimate the frequency of this mode ${\omega }_0(B,T)$ depending on the field and temperature for the specific case of magnetic field induced $d^{\prime }$ state. We find that this mode is {\em tunable} with an applied magnetic field with $ω_0(B,T) \propto B \0$, where $\0$ is the magnitude of the d-wave order parameter. We argue also that similar filed induced clapping mode should be present in an organic p-wave superconductors.

M2S-HTSC-VI Proceedings, Feb 2000, Houston, TX, USA; 4 pages. Physica C, to be published

References in corpus (2)

• Field induced $d_{x^2-y^2}+i{d}_{xy}$ state and marginal stability of high-Tc superconductors
• Local Time-Reversal Symmetry Breaking in d_(x2-y2) Superconductors

Cited by in corpus (2)

• Proximity-induced collective modes in an unconventional superconductor heterostructure
• Anomalous acoustoelectric effect induced by clapping modes in chiral superconductors