Phys. Rev. Lett. 94, 036105 (2005) [4 pages]Low Temperature Disordered Phase of α-Pb/Ge(111)Received 4 August 2004; published 26 January 2005 A new structural phase transition has been observed at low temperature for the one-third of a monolayer (α phase) of Pb on Ge(111) using a variable-temperature scanning tunneling microscope. The well-known (√3×√3)R30 ° to (3×3) transition is accompanied by a new structural phase transition from (3×3) to a disordered phase at ∼76 K. The formation of this “glasslike” phase is a consequence of competing interactions on different length scales. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.036105
DOI:
10.1103/PhysRevLett.94.036105
PACS:
68.35.Rh, 68.35.Bs, 68.37.Ef
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