Change search
ReferencesLink to record
Permanent link

Direct link
KTH, School of Information and Communication Technology (ICT). (Materialfysik)
Show others and affiliations
1992 (English)In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 45, no 12, 6692-6699 p.Article in journal (Refereed) Published
Abstract [en]

By comparing, under identical experimental conditions, high-resolution synchrotron-radiation core-level photoemission spectra taken from both Ge(111) and Ge(100) samples, we establish that the decomposition of the Ge 3d lines from the clean Ge(100) 2 x 1 surface at room temperature requires two surface components shifted by -0.23 and -0.60 eV relative to the bulk one. This deconvolution is fully consistent with the asymmetric-dimer reconstruction model of this surface. We further study the reversible phase transitions that occur on this surface: 2 x 1 <--> c(4 x 2) at low temperature; 2 x 1 <--> 1 x 1 at high temperature. We show from both core-level and valence-band studies that the number of dimer bonds is essentially conserved in these transitions. We also suggest, by comparing a dimer with an Ising spin, that these transitions correspond, respectively, to an antiferromagnetic ordering at low temperatures and to a paramagnetic disordering at high temperatures.

Place, publisher, year, edition, pages
1992. Vol. 45, no 12, 6692-6699 p.
National Category
Natural Sciences
URN: urn:nbn:se:kth:diva-84178DOI: 10.1103/PhysRevB.45.6692ISI: A1992HL04900031OAI: diva2:499255
NR 20140805Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2012-02-13Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text
By organisation
School of Information and Communication Technology (ICT)
In the same journal
Physical Review B Condensed Matter
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 25 hits
ReferencesLink to record
Permanent link

Direct link