Strong coupling and periodic potential at the Pb/Sb(111) interface

Авторы: Vincent T., Vlaic S., Pons S., Tianzhen Zhang, Aubin H., Stolyarov V.S., Ksenz A.S., Ionov A.M., Chekmazov S.V., Bozhko S.I., Roditchev D.
Журнал: Physical Review B
Том: 98
Номер: 155440
Год издания: 2018
Издательство: American Physical Society
Местоположение издательства: United States
DOI: 10.1103/PhysRevB.98.155440
Аннотация: Proximity phenomena between superconductors and topological semimetals are at the heart of the search for novel quantum states of matter. Here we show that the epitaxial interface between one- to three-atomic-layer Pb and the Sb(111) substrate has extremely high electronic transparency. As a result, Pb loses its superconducting and even its metallic properties; its electronic spectrum mimics the semimetallic density of states of Sb. Additional states arise from a threefold symmetric potential which develops at the Pb/Sb interface. Our experimental results are supported by DFT simulations which demonstrate that this potential arises from the corrugated structure of the Pb/Sb interface.
Добавил в систему: Столяров Василий Сергеевич

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