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28 March 2024
 
  » arxiv » 1902.0048

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Weak anti-localization in quasi two-dimensional electronic states of epitaxial LuSb thin films
Shouvik Chatterjee ; Shoaib Khalid ; Hadass S. Inbar ; Aranya Goswami ; Felipe Crasto de Lima ; Abhishek Sharan ; Fernando P. Sabino ; Tobias L. Brown-Heft ; Yu-Hao Chang ; Alexei V. Fedorov ; Dan Read ; Anderson Janotti ; Christopher J. Palmstrøm ;
Date 31 Jan 2019
AbstractObservation of extreme magnetoresistance (XMR) in rare-earth monopnictides has raised enormous interest in understanding the role of its electronic structure. Here, by a combination of molecular-beam epitaxy, low-temperature transport, angle-resolved photoemssion spectroscopy, and hybrid density functional theory we have unveiled the bandstructure of LuSb, where electron-hole compensation is identified as a mechanism responsible for XMR in this topologically trivial compound. In contrast to bulk single crystal analogues, quasi two-dimensional behavior is observed in our thin films for both electron and hole-like carriers, indicative of dimensional confinement of the electronic states. Introduction of defects through growth parameter tuning results in the appearance of quantum interference effects at low temperatures, which has allowed us to identify the dominant inelastic scattering processes and elucidate the role of spin-orbit coupling. Our findings open up new possibilities of band structure engineering and control of transport properties in rare-earth monopnictides via epitaxial synthesis.
Source arXiv, 1902.0048
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