Dynamics and energetics of Ge(001) dimers.
نویسندگان
چکیده
The dynamic behavior of surface dimers on Ge(001) has been studied by positioning the tip of a scanning tunneling microscope over single flip-flopping dimers and measuring the tunneling current as a function of time. We observe that not just symmetric, but also asymmetric appearing dimers exhibit flip-flop motion. The dynamics of flip-flopping dimers can be used to sensitively gauge the local potential landscape of the surface. Through a spatial and time-resolved measurement of the flip-flop frequency of the dimers, local strain fields near surface defects can be accurately probed.
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ورودعنوان ژورنال:
- Physical review letters
دوره 97 26 شماره
صفحات -
تاریخ انتشار 2006