16.06.2021

Wirtualne seminarium: Electronically Isolated Atomic Sb Chains on Si(553) Surface


Akademickie Centrum Materiałów i Nanotechnologii AGH zaprasza na wirtualne seminarium z cyklu „Krakow Condensed Matter Seminar”, które odbędzie się 16 czerwca 2021 r. o godz. 9.00.

Referat pt. Electronically Isolated Atomic Sb Chains on Si(553) Surface wygłosi prof. dr hab. Mieczysław Jałochowski (Instytut Fizyki, Uniwersytet Marii Curie-Skłodowskiej w Lublinie).

Link dla uczestników

Streszczenie

It will be shown how the surfactant phenomenon can be used for synthesis monoatomic Sb chains on vicinal Si(553) surfaces. We show that the surfactant causes the modification surface energy Si and Sb, facilitates the formation of atomic chains Sb without any outdiffusion of Si atoms. As a result, the surface consists of alternately arranged atomic chains of Sb and Pb. Combining atomistic modeling within density functional theory (DFT) with scanning tunneling microscopy (STM) and angle resolved photoemission spectroscopy (ARPES), we show that the formed chains of Sb are strongly compressed, and at the same time electronically isolated, exhibiting nearly textbook one-dimensional free electron behavior.