@article{beac77f93ece46f19069651beb66df74,
title = "Charge transport across metal/molecular (alkyl) monolayer-Si junctions is dominated by the LUMO level",
abstract = "We compare the charge transport characteristics of heavy-doped p ++- and n ++-Si-alkyl chain/Hg junctions. Based on negative differential resistance in an analogous semiconductor-inorganic insulator/metal junction we suggest that for both p ++- and n ++-type junctions, the energy difference between the Fermi level and lowest unoccupied molecular orbital (LUMO), i.e., electron tunneling, controls charge transport. This conclusion is supported by results from photoelectron spectroscopy (ultraviolet photoemission spectroscopy, inverse photoelectron spectroscopy, and x-ray photoemission spectroscopy) for the molecule-Si band alignment at equilibrium, which clearly indicate that the energy difference between the Fermi level and the LUMO is much smaller than that between the Fermi level and the highest occupied molecular orbital (HOMO). Furthermore, the experimentally determined Fermi level - LUMO energy difference, agrees with the non-resonant tunneling barrier height, deduced from the exponential length attenuation of the current.",
author = "Omer Yaffe and Yabing Qi and Luc Scheres and Puniredd, {Sreenivasa Reddy} and Lior Segev and Tal Ely and Hossam Haick and Han Zuilhof and Ayelet Vilan and Leeor Kronik and Antoine Kahn and David Cahen",
note = "US-Israel Binational Science Foundation; Israel Science Foundation, ISF, through its Centre of Excellence; Lise Meitner Minerva Center for Computational Chemistry; National Science Foundation [DMR-1005892]; Princeton MRSEC of the National Science Foundation [DMR-0819860]; NanoNed; Dutch Ministry of Economic Affairs [WSC.6972]; Monroe and Marjorie Burk Fund for Alternative Energy Studies; Azrieli FoundationWe thank the US-Israel Binational Science Foundation (D. C., A. K.), the Israel Science Foundation, ISF, through its Centre of Excellence programs (D. C., L. K.), the Lise Meitner Minerva Center for Computational Chemistry (L. K.), the National Science Foundation (Grant No. DMR-1005892), and the Princeton MRSEC of the National Science Foundation (Grant No. DMR-0819860) (A. K.), NanoNed, funded by the Dutch Ministry of Economic Affairs (Project No. WSC.6972) (H.Z.), and the Monroe and Marjorie Burk Fund for Alternative Energy Studies (D. C.) for partial support. At the Weizmann Institute, this work was made possible in part by the generosity of the H. Perlman family. O.Y. thanks the Azrieli Foundation for an Azrieli Fellowship.",
year = "2012",
month = jan,
day = "20",
doi = "https://doi.org/10.1103/PhysRevB.85.045433",
language = "الإنجليزيّة",
volume = "85",
journal = "Physical Review B",
issn = "1098-0121",
publisher = "American Physical Society",
number = "4",
}