@article{24b201f9698f4498b3070316fffa76d4,
title = "Surface electronic structure engineering of manganese bismuth tellurides guided by micro‐focused angle‐resolved photoemission",
abstract = "Modification of the electronic structure of quantum matter by ad atom deposition allows for directed fundamental design of electronic and magnetic properties. This concept is utilized in the present study in order to tune the surface electronic structure of magnetic topological insulators based on MnBi 2Te 4. The topological bands of these systems are typically strongly electron-doped and hybridized with a manifold of surface states that place the salient topological states out of reach of electron transport and practical applications. In this study, micro-focused angle-resolved photoemission spectroscopy (microARPES) provides direct access to the termination-dependent dispersion of MnBi 2Te 4 and MnBi 4Te 7 during in situ deposition of rubidium atoms. The resulting band structure changes are found to be highly complex, encompassing coverage-dependent ambipolar doping effects, removal of surface state hybridization, and the collapse of a surface state band gap. In addition, doping-dependent band bending is found to give rise to tunable quantum well states. This wide range of observed electronic structure modifications can provide new ways to exploit the topological states and the rich surface electronic structures of manganese bismuth tellurides.",
keywords = "Synchrotron, alkali doping, magnetic topological insulators, microARPES, surface band structure engineering, tunable topological bands",
author = "Klara Volckaert and Paulina Majchrzak and Deepnarayan Biswas and Jones, {Alfred J.H.} and Marco Bianchi and Zhihao Jiang and Rapha{\"e}l Dubourg and Stensh{\o}j, {Rasmus {\O}rnekoll} and Jensen, {Mads Lykke} and Jones, {Nykola C.} and Hoffmann, {S{\o}ren V.} and Jian‐Li Mi and Martin Bremholm and Xing‐Chen Pan and Chen, {Yong P.} and Philip Hofmann and Miwa, {Jill A.} and S{\o}ren Ulstrup",
note = "Publisher Copyright: {\textcopyright} 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.",
year = "2023",
month = sep,
day = "7",
doi = "10.1002/adma.202301907",
language = "English",
volume = "35",
journal = "Advanced Materials",
issn = "0935-9648",
publisher = "Wiley",
number = "36",
}