We investigate the surface structure of Ge(0 0 1) during the (2 × 1)-(1 × 1) phase transition occurring at T > 1130 K by high-resolution scanning tunnelling microscopy. We find a drastic size reduction of dimerized domains in line with substantial dimer breakup accompanied by surface roughening. Completing the picture provided by previous spectroscopic observations, probing with high spatial resolution reveals the nucleation of several nanodomains with distinct vicinal orientations and reconstructions. The structural transformation is irreversible and is not observed for other singular faces of Ge.

Persichetti, L., Sgarlata, A., Fanfoni, M., & Balzarotti, A. (2015). Irreversible order-disorder transformation of Ge(0 0 1) probed by scanning tunnelling microscopy. JOURNAL OF PHYSICS. CONDENSED MATTER, 27(43), 435001 [10.1088/0953-8984/27/43/435001].

Irreversible order-disorder transformation of Ge(0 0 1) probed by scanning tunnelling microscopy

PERSICHETTI, LUCA;SGARLATA, ANNA;FANFONI, MASSIMO;BALZAROTTI, ADALBERTO
2015

Abstract

We investigate the surface structure of Ge(0 0 1) during the (2 × 1)-(1 × 1) phase transition occurring at T > 1130 K by high-resolution scanning tunnelling microscopy. We find a drastic size reduction of dimerized domains in line with substantial dimer breakup accompanied by surface roughening. Completing the picture provided by previous spectroscopic observations, probing with high spatial resolution reveals the nucleation of several nanodomains with distinct vicinal orientations and reconstructions. The structural transformation is irreversible and is not observed for other singular faces of Ge.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/03 - Fisica della Materia
eng
germanium; melting; semiconductor surfaces; Condensed Matter Physics; Materials Science (all)
http://iopscience.iop.org/0953-8984/27/43/435001/pdf/0953-8984_27_43_435001.pdf
Persichetti, L., Sgarlata, A., Fanfoni, M., & Balzarotti, A. (2015). Irreversible order-disorder transformation of Ge(0 0 1) probed by scanning tunnelling microscopy. JOURNAL OF PHYSICS. CONDENSED MATTER, 27(43), 435001 [10.1088/0953-8984/27/43/435001].
Persichetti, L; Sgarlata, A; Fanfoni, M; Balzarotti, A
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/136164
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