Spin-Dependent Molecule Symmetry at a Pentacene鈥揅o Spinterface

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• 作者：Yu-Hsun Chu ; Chuang-Han Hsu ; Chun-I Lu ; Hung-Hsiang Yang ; Tsung-Han Yang ; Chi-Hung Luo ; Kai-Jheng Yang ; Shih-Hao Hsu ; Germar Hoffmann ; Chao-Cheng Kaun ; Minn-Tsong Lin
• 刊名：ACS Nano
• 出版年：2015
• 出版时间：July 28, 2015
• 年：2015
• 卷：9
• 期：7
• 页码：7027-7032
• 全文大小：475K
• ISSN：1936-086X

文摘

Incorporating spin-polarized scanning tunneling microscopy (SP-STM) measurements and first-principles calculations, we resolve spin-polarized states and consequent features in a pentacene(PEN)鈥揅o hybrid system. Symmetry reduction of PEN clarifies the PEN adsorption site and the Co stacking methods. Near the Fermi energy, the molecular symmetry is spin-dependently recovered and an inversion of spin-polarization in PEN with respect to Co is observed. The experimental findings and calculation results are interpreted by a p_z鈥揹 hybridization model, in which spin-dependent bonding鈥揳ntibonding splitting of molecular orbitals happens at metal鈥搊rganic spinterfaces.