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arXiv · 2203.13668

Temperature dependent ARPES of the metallic-like bands in Si(553)-Au

Lenart Dudy·Julian Aulbach·Jörg Schäfer·Ralph Claessen·Victor Rogalev·Piotr Chudzinski
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Abstract

We conducted a thorough investigation into the temperature dependence of the metallic-like bands of Si(553)-Au using angular-resolved photoemission spectroscopy (ARPES). Our study addresses the challenges posed by the short-term stability of the surface and photo-voltage effects, which we overcame to extract changes in the band-filling and Fermi-velocity. Our findings shed light on the low-temperature phase of the step edge in Si(553)-Au, which has been a topic of ongoing debate regarding its structural or electronic nature. Through comparison with theoretical predictions of a structural-related low-temperature to high-temperature phase transition, we discovered that the band-filling and Fermi-velocity do not change accordingly, thereby ruling out this scenario. Our study contributes to a better understanding of this material system and provides an important reference for future research.

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Lenart Dudy, Julian Aulbach, Jörg Schäfer, Ralph Claessen, Victor Rogalev, Piotr Chudzinski. 2023-06-14. Temperature dependent ARPES of the metallic-like bands in Si(553)-Au. https://doi.org/10.1016/j.susc.2023.122356

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