Anomalous structural evolution and root 3x root 3 reconstruction of a clean Si(111) surface observed after thermal desorption of thallium

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10319526" target="_blank" >RIV/00216208:11320/15:10319526 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1116/1.4913199" target="_blank" >http://dx.doi.org/10.1116/1.4913199</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1116/1.4913199" target="_blank" >10.1116/1.4913199</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Anomalous structural evolution and root 3x root 3 reconstruction of a clean Si(111) surface observed after thermal desorption of thallium

Popis výsledku v původním jazyce

The authors have observed anomalous structural evolution of a clean Si(111) surface, which was prepared first by thallium (Tl) deposition on a Si(111)7 x 7 surface, leading to incomplete formation of a Tl/Si(111)1 x 1 structure at 300 degrees C and subsequent desorption of Tl at 350 degrees C. Thus prepared clean Si(111) surfaces exhibit structural changes with increase of temperature: 2 x 1 -> (root 3 x root 3)R30 degrees -> 2 x 1 -> 5 x 5 -> 7 x 7, as observed by low-energy electron diffraction and scanning tunneling microscopy. Among the above structures, the (root 3 x root 3)R30 degrees formed at 450-550 degrees C is found not to be a simple adatom structure. Instead, by means of ab-initio calculations a new metastable (root 3 x root 3)R30 degreesreconstruction was found, having analogous structural features and formation origin to a 2 x 1 reconstruction known as the Pandey chain model. This new (root 3 x root 3)R30 degrees model is 0.09 eV per surface atom less favorable than the

Název v anglickém jazyce

Anomalous structural evolution and root 3x root 3 reconstruction of a clean Si(111) surface observed after thermal desorption of thallium

Popis výsledku anglicky

The authors have observed anomalous structural evolution of a clean Si(111) surface, which was prepared first by thallium (Tl) deposition on a Si(111)7 x 7 surface, leading to incomplete formation of a Tl/Si(111)1 x 1 structure at 300 degrees C and subsequent desorption of Tl at 350 degrees C. Thus prepared clean Si(111) surfaces exhibit structural changes with increase of temperature: 2 x 1 -> (root 3 x root 3)R30 degrees -> 2 x 1 -> 5 x 5 -> 7 x 7, as observed by low-energy electron diffraction and scanning tunneling microscopy. Among the above structures, the (root 3 x root 3)R30 degrees formed at 450-550 degrees C is found not to be a simple adatom structure. Instead, by means of ab-initio calculations a new metastable (root 3 x root 3)R30 degreesreconstruction was found, having analogous structural features and formation origin to a 2 x 1 reconstruction known as the Pandey chain model. This new (root 3 x root 3)R30 degrees model is 0.09 eV per surface atom less favorable than the

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Vacuum Science and Technology A

ISSN

0734-2101

e-ISSN

—

Svazek periodika

33

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

—

Kód UT WoS článku

000355739500037

EID výsledku v databázi Scopus

2-s2.0-84923358079