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arXiv · 2108.08938

Connection between coherent phonons and electron-phonon coupling in Sb (111)

Shoya Sakamoto·Nicolas Gauthier·Patrick S. Kirchmann·Jonathan A. Sobota·Zhi-Xun Shen
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Abstract

We report time- and angle-resolved photoemission spectroscopy measurements on the Sb(111) surface. We observe band- and momentum-dependent binding-energy oscillations in the bulk and surface bands driven by $A_{1g}$ and $E_{g}$ coherent phonons. While the bulk band shows simultaneous $A_{1g}$ and $E_{g}$ oscillations, the surface bands show either $A_{1g}$ or $E_{g}$ oscillations. The observed behavior is reproduced by frozen-phonon calculations based on density-functional theory. This evidences the connection between electron-phonon coupling and coherent binding energy dynamics.

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Shoya Sakamoto, Nicolas Gauthier, Patrick S. Kirchmann, Jonathan A. Sobota, Zhi-Xun Shen. 2021-08-30. Connection between coherent phonons and electron-phonon coupling in Sb (111). https://arxiv.org/abs/2108.08938

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