Grobis M, Khoo K H, Yamachika R, Lu Xinghua, Nagaoka K, Louie Steven G, Crommie M F, Kato H, Shinohara H
Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300, USA.
Phys Rev Lett. 2005 Apr 8;94(13):136802. doi: 10.1103/PhysRevLett.94.136802. Epub 2005 Apr 6.
We have measured the elastic and inelastic tunneling properties of isolated Gd@C(82) molecules on Ag(001) using cryogenic scanning tunneling spectroscopy. We find that the dominant inelastic channel is spatially well localized to a particular region of the molecule. Ab initio pseudopotential density-functional theory calculations indicate that this channel arises from a vibrational cage mode. We further show that the observed inelastic tunneling localization is explained by strong localization in the molecular electron-phonon coupling to this mode.
我们使用低温扫描隧道光谱法测量了孤立的Gd@C(82)分子在Ag(001)上的弹性和非弹性隧穿特性。我们发现，主要的非弹性通道在空间上很好地局限于分子的特定区域。从头算赝势密度泛函理论计算表明，该通道源于一种振动笼模式。我们进一步表明，观察到的非弹性隧穿局域化是由分子电子-声子耦合到该模式的强局域化所解释的。
