journal article·2023-01-12Open access

Influence of local symmetry on lattice dynamics coupled to topological surface states

Jonathan A. Sobota, Samuel W. Teitelbaum, Yijing Huang, José D. Querales-Flores, Robert Power, Meabh Allen, Costel R. Rotundu, Trevor P. Bailey, Ctirad Uher, Tom Henighan, Mason Jiang, Diling Zhu, Matthieu Chollet, Takahiro Sato, Mariano Trigo, Éamonn D. Murray, Ivana Savić, Patrick S. Kirchmann, Stephen Fahy, David A. Reis, Zhi-Xun Shen

Physical Review B· Volume 107· Issue 1

Abstract

An ongoing challenge is to manipulate topological states using ultrafast pulses of light. One strategy is $l\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}c\phantom{\rule{0}{0ex}}e$ $e\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}g\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}e\phantom{\rule{0}{0ex}}e\phantom{\rule{0}{0ex}}r\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}g$, whereby the surface state wavefunctions are modified through light-induced structural distortions. Here, the authors perform time-resolved photoemission, time-resolved diffraction, and theoretical calculations to reveal how topological surface states couple to photoinduced lattice vibrations. They show how the surface vibrational spectrum is qualitatively different from that of the bulk due to the translational and inversion symmetries broken at the surface.
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Research context

OpenAlex topics: Topological Materials and Phenomena · Advanced Condensed Matter Physics · Electronic and Structural Properties of Oxides

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

Affiliations

Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA

Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA

Department of Physics, Arizona State University, Tempe, Arizona 85281, USA

Department of Applied Physics, Stanford University, Stanford, California 94305, USA

Tyndall National Institute, Lee Maltings, Dyke Parade, Cork T12 R5CP, Ireland

Department of Physics, University College Cork, College Road, Cork T12 K8AF, Ireland

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA

Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA

Department of Photon Science, Stanford University, Stanford, California 94305, USA

Funding

U.S. Department of Energy · Basic Energy Sciences · Division of Materials Sciences and Engineering · SLAC National Accelerator Laboratory · Science Foundation Ireland · Irish Centre for High-End Computing · Economy Northern Ireland Investigators Programme

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