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http://dx.doi.org/10.9714/psac.2017.19.1.001

Ultrafast probes of coherent oscillations in Fe-based superconductors  

Kim, K.W. (Department of Physics, Chungbuk National University)
Publication Information
Progress in Superconductivity and Cryogenics / v.19, no.1, 2017 , pp. 1-4 More about this Journal
Abstract
Forefront ultrafast experimental techniques have recently proven their potential as new approaches to understand materials based on non-equilibrium dynamics in the time domain. The time domain approach is useful especially in disentangling complicated coupling among charge, spin and lattice degrees of freedom. Various ultrafast experiments on Fe-based superconductors have observed strong coherent oscillations of an $A_{1g}$ phonon mode of arsenic ions, which shows strong coupling to the electronic and magnetic states. This paper reviews the recent reports of ultrafast studies on Fe-based superconductor with a focus on the coherent oscillations. Experimental results with ultrashort light sources from the terahertz-infrared pulses to the hard X-rays from a free electron laser will be presented.
Keywords
Fe-based superconductors; coherent oscillations; ultrafast dynamics;
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