Bilayer of Terbium Double-Decker Single-Molecule Magnets

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• 作者：Giulia Serrano ; Stefan Wiespointner-Baumgarthuber ; Stefano Tebi ; Svetlana Klyatskaya ; Mario Ruben ; Reinhold Koch ; Stefan Müllegger
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：June 30, 2016
• 年：2016
• 卷：120
• 期：25
• 页码：13581-13586
• 全文大小：394K
• 年卷期：0
• ISSN：1932-7455

文摘

We report a low-temperature scanning tunneling microscopy and spectroscopy study of the structural and electronic properties of a bilayer of terbium double-decker (bis(phthalocyaninato)terbium(III), TbPc₂) molecules on Au(111) at 5 K. The TbPc₂ molecules are found to adsorb flat on top of a first compact TbPc₂ monolayer on Au(111), forming a square-like packing similar to the underlying first layer. Their frontier-orbital electronic structure, measured by tunneling conductance spectroscopy, clearly differs from that of the underlying first monolayer. Our results of second-layer molecules indicate the absence of, both, hybrid molecule–substrate electronic states close to the Fermi level and a zero-bias Kondo resonance. We attribute these findings to a decreased electronic coupling with the Au(111) substrate.