Phys. Rev. B 80, 155458 (2009) [6 pages]Two-dimensional metal-organic coordination networks of Mn-7,7,8,8-tetracyanoquinodimethane assembled on Cu(100): Structural, electronic, and magnetic propertiesReceived 3 August 2009; revised 5 October 2009; published 30 October 2009 A compound two-dimensional (2D) monolayer mixing Mn atoms and 7,7,8,8-tetracyanoquinodimethane (TCNQ) molecules was synthesized by supramolecular assembly on a Cu(100) surface under ultrahigh vacuum conditions. Its structural, electronic, and magnetic properties were analyzed by scanning tunneling microscopy experiment and theory, low-energy electron diffraction, x-ray photoemission spectroscopy, and density-functional theory calculations. The 2D compound has a long-range ordered square planar network structure consisting of fourfold coordinated Mn centers with a Mn:TCNQ ratio of 1:2. The electronic-state analysis revealed a complex charge-transfer scenario indicating strong bonding of TCNQ with both the Mn adsorbates and the Cu surface atoms. The calculations reveal that the Mn centers carry a magnetic moment close to 5μB with very weak coupling between adjacent Mn centers. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.80.155458
DOI:
10.1103/PhysRevB.80.155458
PACS:
68.43.Hn, 81.16.Fg, 68.37.Ef, 68.43.Bc
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