Ultrafast Optical Control of Magnetic Order and Fermi Surface Topology at a Quantum Critical Point
arXiv:2106.08220 · doi:10.1088/1361-648X/ad9659
Abstract
Designing material properties on demand has important implications to potential future technological applications. While theoretically it is always possible to tune various intrinsic energy scales, there are fundamental limitations to this approach in experiment. In recent years, ultrafast spectroscopy has evolved as a promising tool to use light to dynamically induce non-trivial electronic states of matter. Here we theoretically investigate light pulse driven dynamics in a Kondo system close to quantum criticality. We show, that light can dehybridize the local Kondo screening and induce magnetic order out of a previously paramagnetic state. We demonstrate that, depending on the laser pulse field parameters, it is possible to deconfine the Kondo singlet and thereby induce second order phase transition to a dynamically ordered state, as well as a dynamic Lifshitz transition that changes the Fermi surface topology from hole- to electron-like.
arXiv comment10 pages, 4 figures, comments welcome
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