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Accelerating Materials Innovation 

Electron Spectroscopy

Photoelectron Spectroscopy | © Scienta Omicron

Scanning Probe Microscopy

LT STM Lab | © Scienta Omicron

Thin Film Deposition

Lab10 MBE System | © Scienta Omicron

Result of the Month (ROM), February 2025

Strong Electron–phonon Coupling In Magic-angle Twisted Bilayer Graphene

The unusual properties of superconductivity in magic-angle twisted bilayer graphene (MATBG) have sparked considerable research interest. However, despite the dedication of intensive experimental efforts and the proposal of several possible pairing mechanisms, the origin of its superconductivity remains elusive. Here, by utilizing angle-resolved photoemission spectroscopy with micrometre spatial resolution, we reveal flat-band replicas in superconducting MATBG, where MATBG is unaligned with its hexagonal boron nitride substrate. These replicas show uniform energy spacing, approximately 150 ± 15 meV apart, indicative of strong electron–boson coupling. Strikingly, these replicas are absent in non-superconducting twisted bilayer graphene (TBG) systems, either when MATBG is aligned to hexagonal boron nitride or when TBG deviates from the magic angle. Calculations suggest that the formation of these flat-band replicas in superconducting MATBG are attributed to the strong coupling between flat-band electrons and an optical phonon mode at the graphene K point, facilitated by intervalley scattering. These findings, although they do not necessarily put electron–phonon coupling as the main driving force for the superconductivity in MATBG, unravel the electronic structure inherent in superconducting MATBG, thereby providing crucial information for understanding the unusual electronic landscape from which its superconductivity is derived.

Announcing the Winner of our 40th Anniversary Contest

Congratulations to Chuanxu Ma from the University of Science and Technology of China for winning our 40th Anniversary Photo Contest!

The Nanoscience Laboratory at USTC has been conducting research on single-molecule science and on-surface synthesis using our LT-STM Lab since 1998.

"Our LT-STM system, equipped with non-contact atomic force microscopy (nc-AFM) since its upgrade in 2016, has been incredibly stable. We can now capture bond-resolved AFM images of on-surface synthesized structures and measure their electronic properties simultaneously. The long liquid He holding time (3 days) allows us to easily acquire the high-quality data we need. Scienta Omicron, just like our LT-STM system, is always reliable!" - Chuanxu Ma.

Thanks to everyone who participated in our photo contest and celebrated with us!

Latest News

News PEAK-1.5 Now Available for Download!

We're thrilled to announce that PEAK-1.5 is now ready for download at the Scienta Omicron Customer Portal. Here's a quick overview of the new features you can expect with this release:

  • New Sequence Control for easier setup of measurements
  • A fresh Sequence View with Spectrum Region Summaries for better control during measurement
  • Introduction of Continuous Pass Energies for optimisation of instrument resolution and data recording efficiency (requires a new software license)
  • Introduction of a Detector Overexposure Monitor to protect the MCP/CMOS detector from intensity overload

Sample Manipulators

Open and Closed Cycle Sample Manipulators

When aiming at high experimental energy resolution for ARPES measurement, it is crucial to achieve ultra-low sample temperatures to quench thermal broadening. This is possible with state-of-the-art cryo manipulators reaching sample temperatures from < 3.5 K and featuring up to 6 fully motorized axes for a large range of movements. The manipulators are available as open and closed cycle. Open cycle manipulators reach lower temperature specifications and are rapidly cooled down from room temperature to 10 K in 15 min. The low He consumption below 1 l/h at ultimate temperature and the possibility to operate with liquid nitrogen at higher temperatures ensure a low operating cost. Closed cycle manipulators have no He consumption providing unlimited holding time.

Service Upgrade

PEAK Slit Control

Optimal analyser settings with remote control

In photoelectron spectroscopy measurements, there is always a trade-off between signal intensity and resolution. Optimising this balance is the key to obtaining smooth and sharp spectra within the shortest time possible. For hemispherical analysers, this trade-off is controlled by the selected entrance slit and pass energy.
PEAK Slit Control replaces manual slit changes at the analyser with a motorised and software-controlled slit. With the control of all analyser settings, easy and quick optimisation of signal intensity versus resolution is possible.

About Us 

Scienta Omicron is a leading innovator in Surface Science and Nanotechnology. At our technology centres in Uppsala, Sweden and Taunusstein, Germany we develop and produce high-tech instruments. Our instruments support top researchers globally and are serviced by our four regional hubs in USA, China, Japan and Germany.

We provide state of the art instruments in Electron Spectroscopy, Scanning Probe Microscopy and Thin Film Deposition. Focusing on the race for new unique materials and solutions, in areas like – smarter batteries, next generation electronics, quantum technologies, solar energy, intelligent sensors and advanced materials, Scienta Omicron enables development of tomorrow´s materials.

THE SCIENTA GROUP: One Group, Two Leading Brands

Since 1983 the combined companies, including Scienta Omicron and Scienta Envinet (former Scienta Sensor Systems and Envinet GmbH respectively) that make up the Scienta Scientific Group have been leading the development of ultra high vacuum research and analysis equipment in the fields of Surface Science, Material Physics, UHV technology and Radiation Detection, resulting in scientific breakthroughs, Nobel Prizes and outstanding industrial equipment.

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