Abstract
Nanofilm allotrope and phase transformation of ultrathin Bi film on Si(111)-7 × 7 were analyzed using scanning tunneling microscopy and electron diffraction experiments. It was observed that this pseudocubic {012}-oriented allotrope is stable up to four atomic layers at room temperature. The entire volume of the film started to transform into a bulk single-crystal (001) phase, as the bulk contribution in the cohesion became dominant, above the critical thickness. It was proposed that the allotrope consists of black phosphorus-like puckered layers stabilized by saturating all the pz dangling bonds in the film, based on ab initio calculations.
Original language | English |
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Article number | 105501 |
Pages (from-to) | 105501-1-105501-4 |
Journal | Physical review letters |
Volume | 93 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2004 Sep 3 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)