Abstract
We report on the construction of a variable temperature scanning tunneling microscope (STM) operating from 20 to 700 K in UHV, which routinely allows one to image dense packed metal surfaces in atomic resolution down to the lowest temperature. Central problems in designing a variable temperature STM are discussed in some detail. Methods to achieve efficient vibration isolation between the cryostat and the STM are presented. Furthermore, a sample and sample holder assembly is described, which ensures long-term mechanical stability and STM imaging, while subject to extreme temperature variations. The temperature response of the STM while cooling and heating the sample is measured and will be discussed.
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