journal article·2021-04-01Open access

Disorder-Promoted Splitting in Quasiparticle Interference at Nesting Vectors

V. S. Stolyarov, V. A. Sheina, D. A. Khokhlov, S. Vlaic, S. Pons, H. Aubin, R. S. Akzyanov, A. S. Vasenko, T. V. Menshchikova, E. V. Chulkov, A. A. Golubov, T. Cren, D. Roditchev

Abstract

Inelastic interactions of quantum systems with the environment usually wash coherent effects out. In the case of Friedel oscillations, the presence of disorder leads to a fast decay of the oscillation amplitude. Here we show both experimentally and theoretically that in three-dimensional topological insulator Bi 2 Te 3 there is a nesting-induced splitting of coherent scattering vectors which follows a peculiar evolution in energy. The effect becomes experimentally observable when the lifetime of quasiparticles shortens due to disorder. The amplitude of the splitting allows an evaluation of the lifetime of the electrons. A similar phenomenon should be observed in any system with a well-defined scattering vector regardless of its topological properties.
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Research context

OpenAlex topics: Topological Materials and Phenomena · Graphene research and applications · Quantum many-body systems

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratoire de Physique et d’Étude des Matériaux (LPEM), UMR-8213, ESPCI Paris, PSL Research University, CNRS, Sorbonne Université, 75005 Paris, France

TQPSS Lab, Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Dolgoprudny, 141700 Moscow, Russia

Dukhov Research Institute of Automatics (VNIIA), 127055 Moscow, Russia

C2N, UMR-9001, CNRS, Paris-Saclay Université, 91120 Palaiseau, France

Institute for Theoretical and Applied Electrodynamics, Russian Academy of Sciences, 125412 Moscow, Russia

HSE University, 101000 Moscow, Russia

I. E. Tamm Department of Theoretical Physics, P. N. Lebedev Physical Institute, Russian Academy of Sciences, 119991 Moscow, Russia

Tomsk State University, 634050 Tomsk, Russia

Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, San Sebastián/Donostia, 20018 Basque Country, Spain

Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands

INSP, UMR-7588, Sorbonne Université, CNRS, 75005 Paris, France

Funding

Agence Nationale de la Recherche · Russian Science Foundation · Foundation for the Advancement of Theoretical Physics and Mathematics · National Research University Higher School of Economics · European Cooperation in Science and Technology · Ministry of Science and Higher Education of the Russian Federation · Horizon 2020 Framework Programme

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