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Competing charge ordering and Mott phases in a correlated Sn/Ge(111) two-dimensional triangular lattice

AuthorsCortés, R.; Tejeda, A.; Lobo-Checa, Jorge ; Didiot, C.; Kierren, B.; Malterre, D.; Flores, Fernando; Michel, Enrique G.; Mascaraque, Arantzazu
Issue Date2013
PublisherAmerican Physical Society
CitationPhysical Review B 88: 125113 (2013)
AbstractWe take advantage of complementary high-resolution experimental techniques and theoretical tools to get insight into the α-Sn/Ge(111) triangular lattice surface consisting of sp electrons. We report a (3×3) phase, characterized by a charge ordering settled by electronic correlation, which appears between the known metallic-(3×3) and Mott insulator phases. We identify the atomistic mechanism behind the stabilization of this phase and interpret these findings on the basis of theoretical calculations. We disentangle the role of the various degrees of freedom in the stability of the different phases found and describe the stepwise surface changes between the metallic and Mott insulating phases. © 2013 American Physical Society.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.88.125113
Identifiersdoi: 10.1103/PhysRevB.88.125113
issn: 1098-0121
e-issn: 1550-235X
Appears in Collections:(CFM) Artículos
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