Temperature‐Dependent Tip‐Induced Motion of Ga Adatom on GaAs (110) Surface
| Autor: | Shigeru Kaku, Junji Yoshino |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Surface (mathematics)
Materials science Motion (geometry) 02 engineering and technology General Chemistry Electronic structure 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics 0104 chemical sciences law.invention Biomaterials Maxima and minima Condensed Matter::Materials Science law Physics::Atomic and Molecular Clusters General Materials Science Scanning tunneling microscope 0210 nano-technology Adsorption energy Biotechnology Line (formation) |
| Zdroj: | Small. 16:2002296 |
| Popis: | The temperature-dependent tip-induced-motion of a Ga adatom on a GaAs (110) surface is experimentally demonstrated using scanning tunneling microscopy (STM). The surface adsorption energy profile obtained by first-principle electronic structure calculations reveals that the origin of the Ga motion observed at 78 K is attributable to the tip-induced Ga adatom hopping between the most stable potential minima among the three local minima, whereas that observed at 4.2 K is attributable to the tip-induced hopping and sliding motions through the next stable minima as well as the most stable minima. Furthermore, it is shown that a slight progressive modification of the adatom motion observed only at 4.2 K resulting from repeated STM line scans is consistent with the overall picture taking account of the heating of the adatom owing to the tip current. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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