Controlling the orbital sequence in individual Cu-phthalocyanine molecules.
We report on the controlled change of the energetic ordering of molecular orbitals. Negatively charged copper(II)phthalocyanine on NaCl/Cu(100) undergoes a Jahn-Teller distortion that lifts the degeneracy of two frontier orbitals. The energetic order of the levels can be controlled by Au and Ag atoms in the vicinity of the molecule. As only one of the states is occupied, the control of the energetic order is accompanied by bistable changes of the charge distribution inside the molecule, rendering it a bistable switch.
Institute of Experimental and Applied Physics, University of Regensburg, 93053 Regensburg, Germany.
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Uhlmann
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Swart
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Repp
D003300:Copper / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D054833:Isoindoles; D011789:Quantum Theory; D012965:Sodium Chloride / Q000737:chemistry
D007211:Indoles; D054833:Isoindoles; D012965:Sodium Chloride; D003300:Copper; C013647:phthalocyanine