Postdoctoral research fellowship on twisted oxide membranes

2 weeks ago

Kongens Lyngby, Lyngby-Tårbæk Kommune, Denmark DTU - Technical University of Denmark Full time

Do you want to contribute to creating a new generation of cutting-edge projects that involve both structural and electronic characterization of quantum materials?

At DTU, our research focuses on developing innovative freestanding membranes made from complex oxides. These membranes provide a unique approach to designing the next generation of complex oxide devices by utilizing stacking and twisting techniques. This postdoc fellowship will build on this knowledge to explore and realize new properties in twisted membranes within complex oxide thin films.

The position offered is part of the ERC Advanced project NEXUS, which is dedicated to expanding the potential of oxide membrane technology. NEXUS employs a radically different approach compared to previous efforts, aiming for fundamental breakthroughs in the study of transport across interfaces by utilizing twisted membranes. This innovative method offers an exciting way to tune the properties of the materials.

The goal of the Postdoctoral Researcher is to develop methods for fabricating, releasing, and twisting complex oxide membranes, with the overall aim of investigating these twisted materials using advanced High-Resolution Transmission Electron Microscopy (HRTEM) techniques. Due to the strong bonding between layers, moiré patterns in oxide bilayers can form over a broader range of twist angles compared to van der Waals (vdW) materials. In strong collaboration with the Electron Microscopy Center at the University of Antwerp (EMAT) and the Electron Microscopy Center at DTU, the postdoctoral researcher will study the reconstructed structures of various complex oxides at different twist angles to better understand their properties.

The overall aim of this project is to

  • Develop methods for controlling the twist angle of artificial freestanding oxide membranes, where the interface can be tuned by selecting the membrane's material and orientation.
  • Engineer the interfaces by adjusting the twist angle.
  • Strategically explore and understand the emergent properties of these artificial interfaces and determine the physical and chemical origins of interfacial reconstruction.
  • Analyze and interpret the results obtained from the advanced HRTEM approach.

Responsibilities and qualifications
PhD in Physics, Materials Science, Chemistry, Electrical Engineering or similar.

  • Strong experience in thin film deposition technologies, especially PLD.
  • Background in applied physics/materials science.
  • Experience in structural characterizations (XRD, RSM, RHEED, and TEM).
  • Experience in programming or writing analysis software is advantageous.
  • Previous experience in nano/micrometer-size device fabrication techniques, especially e-beam lithography is advantageous, but not a requirement.
  • Previous experience in fabricating oxide membranes is an advantage.
  • Previous experience in characterization of electrical conductivity and/or magnetic properties.
  • Ability to work independently, to plan and carry out complicated tasks, and to be part of a large, dynamic group.
  • Good communication skills in English, both written and spoken.

As a formal qualification, you must hold a PhD degree (or equivalent).

We offer
DTU is a leading technical university globally recognized for the excellence of its research, education, innovation and scientific advice. We offer a rewarding and challenging job in an international environment. We strive for academic excellence in an environment characterized by collegial respect and academic freedom tempered by responsibility.

Salary and terms of employment
The appointment will be based on the collective agreement with the Danish Confederation of Professional Associations. The allowance will be agreed upon with the relevant union.

The period of employment is 2 years. The expected starting date is 1 July 2025 or earlier, but requests for later starting dates can also be met.

Application procedure
Your complete online application must be submitted no later than 31 March 2025 (23:59 Danish time) .

Applications must be submitted as one PDF file containing all materials to be given consideration. To apply, please open the link "Apply now", fill out the online application form, and attach all your materials in English in one PDF file . The file must include:

  • Application (cover letter)
  • CV
  • Academic Diplomas (MSc/PhD – in English)
  • List of publications
  • Grade transcripts

Applications received after the deadline will not be considered.

All interested candidates irrespective of age, gender, disability, race, religion or ethnic background are encouraged to apply. As DTU works with research in critical technology, which is subject to special rules for security and export control, open-source background checks may be conducted on qualified candidates for the position.

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