Observation of an excitonic state in a topological insulator
ORAL
Abstract
The exciton, a bound state of an electron and a hole, is a fundamental quasiparticle induced by coherent light-matter interactions in semiconductors. Recent progress of topological phases of matter has shed light on new routes to inducing novel excitonic phases. We will report a direct observation of the excitonic state in a topological insulator measured by the ultrafast technique and also discuss the results in terms of correlations. Our work opens up a new platform for exploring exciton-mediated state in topological materials and their application.
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Presenters
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Ryo Mori
Lawrence Berkeley National Lab, The University of Tokyo
Authors
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Ryo Mori
Lawrence Berkeley National Lab, The University of Tokyo
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Samuel T Ciocys
University of California, Berkeley
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Kazuaki Takasan
The University of Tokyo, University of Tokyo
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Ping Ai
Lawrence Berkeley National Laboratory
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Kayla R Currier
Lawrence Berkeley National Laboratory
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Takahiro Morimoto
The university of Tokyo, University of Tokyo, The University of Tokyo, Univ of Tokyo
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Joel E Moore
Department of Physics, UC Berkeley and Materials Sciences Division, LBNL, University of California, Berkeley
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Alessandra Lanzara
University of California, Berkeley