LT STM

Ultimate SPM Performance below 5K

At a Glance

  • Increased hold time to >65h at same performance level „
  • High frequency wiring „
  • Increased spectroscopy resolution „
  • Record proven platform since 1996 with more than 200 devices installed „
  • Reliable design ensuring high up-time „
  • Independent tip and sample temperature „
  • Leading QPlus AFM technology

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Impressions

Since its introduction in 1996, our Low Temperature STM has set the standard for stability, performance and productivity for LHe4 bath cryostat STMs. More than 20 years after presenting the LT STM, the importance of low temperature SPM techniques in a wide range of active scientific fields is still unbroken.

Spectroscopy on molecules, atom manipulation, carbon, superconductors, semiconductors, gases on metals, and magnetics are only a few examples where research takes great advantage of low temperature SPM. Within all these areas more publications have been produced with our LT STM than with all other commercial low temperature SPM´s combined.

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The third generation of the LT STM

In recent years, the publications have highlighted the industry-leading QPlus AFM performance that the LT STM provides. As we continue to release new STM plat- forms, Scienta Omicron is also pleased to announce the release of a new, third-generation instrument that further improves the performance and productivity of the LT STM.

A key feature of the third generation is a 30% increase in liquid helium hold time. This is of great advantage for all low temperature experiments, reducing operating costs and providing users more flexibility. The new cryostat design enables long-term spectroscopy experiments without any compromise to the stability the LT STM has always delivered.

Additionally, completely new state of the art wiring and connections have been designed throughout the system. The LT STM III now supports high frequency lines for tip and sample to enable time resolved STM experiments in the GHz range.

Further, the ultimate energy resolution for spectroscopy has been improved to < 1meV, ideal for work with superconducting materials. When combined with the MATRIX 4 controller and its new, high performance PLL, performing QPlus AFM experiments in the LT STM will be easier and more powerful than any other QPlus AFM platform.

This third generation of the LT STM enables our customers to carry out the most advanced low temperature STM, spectroscopy and QPlus AFM experiments. And like its previous iterations, the ease-of-use, stability and proven reliability in the LT STM ensure a high productivity, workhorse microscope.

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The LT STM cryostat

The LT STM is typically used for experiments which require the highest level of stability and performance. To support such experiments, we increased the hold time of liquid helium by 30% without any compromise to the proven stability the LT STM always delivered.

By enlarging the volume of the LN2 vessel, the LN2 level in the cryostat is always above the level of LHe leading to a reduced helium evaporation rate and an overall hold time of more than 65h. This is of great advantage for all low temperature experiments and will further improve the performance and productivity of your LT STM with reduced operating costs.

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Ultimate QPlus performance

Scienta Omicrons leading QPlus technology has been proven in innumerable publications showing highest resolution noncontact atomic force microscopy (nc-AFM) images. Detecting the short range chemical interaction between the foremost tip and sample atoms, enables atomic resolution imaging and quantitative force measurements.

An essential part of successful Qplus AFM operation is the sensor construction technology. Scienta Omicron has long been the recognized leader in providing the highest quality, most reliable Qplus AFM sensor technology. In the third generation of the LT STM we use the latest generation of QPLus sensors. This advanced fully computer controlled manufacturing technique ensures high yield sensors with sharp resonance frequencies and high quality factors.

With our sophisticated ex-situ preamplifier technique, we are able to fulfil our promise to deliver the highest up-time without sacrificing performance. Combined with our high performance PLL of the MATRIX 4 SPM controller, performing QPlus experiments is both easier and more powerful compared to any other QPlus AFM platform.

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