Scanning probe microscopy in high vectorial magnetic fields: New device for imaging quantum materials

Project Information

VectorFieldImaging

Grant agreement ID: 101069239

DOI

10.3030/101069239

Project closed

EC signature date 19 May 2022

Start date 1 June 2022

End date 30 November 2024

Funded under

• European Research Council (ERC)

Total cost

No data

EU contribution

€ 150 000,00

Coordinated by

UNIVERSIDAD AUTONOMA DE MADRID
Spain

Periodic Reporting for period 1 - VectorFieldImaging (Scanning probe microscopy in high vectorial magnetic fields: New device for imaging quantum materials)

Reporting period: 2022-06-01 to 2024-11-30

Summary of the context and overall objectives of the project

The VectorFieldImaging project aims to address a critical limitation in current scanning tunneling microscope (STM) technology when studying quantum materials under high magnetic fields. While existing STMs can manipulate materials under varying temperature and magnetic fields, the vector nature of magnetic fields makes their precise control more challenging. The current solution—using three separate solenoids—reduces the achievable field strength to around 5-7 Tesla, which is often insufficient for in-depth quantum phenomena studies. Additionally, this method is costly and complicated, limiting its broad application.

The project proposes a groundbreaking solution: rotating the entire STM within a high magnetic field solenoid to manipulate the magnetic field vector efficiently. This approach allows for more precise control over the magnetic field direction while maintaining access to high field strengths. The goal is to demonstrate the technical feasibility of this solution through the development and testing of working prototypes, paving the way for its commercialization and widespread use in quantum materials research.

This advancement will have significant scientific impact by providing unprecedented insights into quantum materials, which are crucial for developing next-generation technologies like quantum computing and spintronics. Researchers will be able to study the properties of materials at atomic scales under high, vector-controlled magnetic fields, enabling them to explore new quantum phenomena and discover novel materials with unique properties.

On the commercial side, the project offers a more cost-effective, compact, and user-friendly solution for STM-based research in academia and industry. This could democratize access to cutting-edge research tools, accelerating innovation in quantum technologies and materials science.

In summary, the VectorFieldImaging project fills a critical gap in current research tools, unlocking new potential for the study of quantum materials and their applications, with wide-ranging impacts on both science and industry.

Work performed from the beginning of the project to the end of the period covered by the report and main results achieved so far

The VectorFieldImaging project has made significant progress in advancing scanning tunneling microscopy (STM) for studies under high vectorial magnetic fields. The following summarizes the main activities and achievements:

1. Miniaturized STM Design and Construction: The project focused on optimizing the size and structure of the STM to integrate it into a rotating platform within a magnetic field solenoid. By using 3D-printed metal components, the STM was successfully miniaturized while maintaining precision, robustness, and functional capabilities. This compact STM was tested by capturing high-resolution topographic images of gold surfaces and measuring quantized conductance in atomic-scale contacts, which validated its operation under the designed conditions.

2. Development and Testing of a One-Axis Rotator: A one-axis rotator was designed, integrated, and successfully tested, enabling the STM to rotate within the solenoid while aligning with the magnetic field. This rotator allows for precise control of the field direction at atomic scales, which is crucial for quantum materials research. It was tested under cryogenic conditions, confirming its stability and reproducibility in STM measurements at various magnetic field angles. The successful tests demonstrated the feasibility of performing STM measurements in high vectorial magnetic fields, a key breakthrough for studying quantum materials.

3. Development of a Two-Axis Rotator System: Building on the success of the one-axis rotator, the project designed and fabricated a two-axis rotator system for more fine-tuned control over the STM’s orientation in three dimensions. This allows for full manipulation of the magnetic field vector, which is essential for in-depth studies of quantum materials. The design and fabrication of the two-axis rotator prototype were completed, and it is now in the final stages of integration and testing. Early tests indicate that it will provide precise control over the magnetic field vector, enabling the study of materials under different magnetic orientations at high field strengths.

Outcomes of the Action:
• A miniaturized STM prototype capable of operating in high magnetic fields, ready for integration with the next stages of the project.
• A one-axis rotator system successfully integrated and tested for precise control of STM orientation, with tests under low temperatures and high magnetic fields demonstrating the system's stability and functionality.
• A two-axis rotator prototype nearing final testing, designed to provide full 3D control of the STM's orientation and magnetic field direction.

These achievements mark a significant technical and scientific milestone for the project. The successful integration and testing of the miniaturized STM, one-axis rotator, and two-axis rotator systems demonstrate the feasibility of STM operation in high vectorial magnetic fields. This breakthrough opens up new opportunities for studying quantum materials and advancing material science research at the atomic scale.

Progress beyond the state of the art and expected potential impact (including the socio-economic impact and the wider societal implications of the project so far)

The VectorFieldImaging project has achieved significant breakthroughs in scanning tunneling microscopy (STM) and its integration with high vectorial magnetic fields, offering new opportunities in quantum material studies. Key innovations include:

- STM and Magnetic Field Manipulation. Traditional STMs are hindered by large, costly multi-solenoid systems or limited control of magnetic field directionality. This project introduced a novel method of rotating the entire STM within a solenoid, providing precise control over magnetic field orientation while maintaining high field strengths. This advancement allows high-resolution studies of atomic-scale material properties under varying magnetic fields, enabling new research possibilities in quantum materials.

- Miniaturized STM with Rotation Capabilities. The miniaturized STM, designed with 3D-printed metal components, is compact and adaptable to various experimental setups. It can now operate in high magnetic fields, shifting away from bulky systems. This miniaturization enhances flexibility and precision for quantum material studies, particularly in quantum computing and spintronics.

This project will advance the understanding of quantum materials, enabling studies on topological states, quantum phase transitions, and spintronics. It may lead to breakthroughs in quantum computing, energy storage, and sensors.

From the commercial point of view, the miniaturized STM and rotating systems offer a cost-effective solution for studying materials under high magnetic fields. These innovations have broad potential for adoption in both academic and industrial labs. The technology is poised to accelerate research into quantum materials and technologies, including quantum computers and sensors, by allowing unprecedented visualization of material properties.

As future steps, we identify:
- Further development of the two-axis rotation system and cryogenic optimization.
- Commercialization through partnerships and intellectual property protection.
- Engaging in international collaboration for standardization and broader adoption.

In summary, the VectorFieldImaging project has introduced revolutionary STM advancements that open new avenues for studying quantum materials and advancing quantum technologies.