Probing superconductivity and pairing symmetry by coherent phonons in multiorbital superconductors
arXiv:1503.03397 · doi:10.1103/PhysRevB.92.140504
Abstract
We show that the phase information contained in coherent phonon oscillations generated by a laser pulse in a multi- orbital superconductor can be used as an experimental tool to probe super- conductivity and pairing symmetries. The phase difference between the normal and superconducting states is proportional to the superconducting order parameter just below the superconducting transition temperature, Tc. It also exhibits different behaviors for superconducting states with different pairing symmetries. In particular, if there is an orbital-dependent internal sign change state, the phase difference can have a discontinuous jump below Tc.
5 pages, 3 figures
References in corpus (13)
- Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsOF}
- Nematic order in iron superconductors - who is in the driver's seat?
- Magnetism, superconductivity, and pairing symmetry in Fe-based superconductors
- Magnetism and its microscopic origin in iron-based high-temperature superconductors
- Pairing Symmetry in a Two-Orbital Exchange Coupling Model of Oxypnictides
- d-wave pairing from spin fluctuations in the KxFe{2-y}Se2 superconductors
- Spin dynamics and an orbital-antiphase pairing symmetry in iron-based superconductors
- Controlled vaporization of the superconducting condensate in cuprate superconductors sheds light on the pairing boson
- Ultrafast transient response and electron-phonon coupling in the iron-pnictide superconductor Ba(Fe(1-x)Co(x))2As2
- Direct Role of Structural Dynamics in Electron-Lattice Coupling of Superconducting Cuprates
- Ultrafast structural dynamics of the Fe-pnictide parent compound BaFe2As2
- Direct characterization of photo-induced lattice dynamics in BaFe2As2
- Acoustic and optical phonon dynamics from femtosecond time-resolved optical spectroscopy of superconducting iron pnictide Ca(Fe_0.944Co_0.056)_2As_2