Doctoral Researchers in Condensed Matters Theory

We are seeking two Doctoral Researchers who will focus on the theory of superconductivity in novel quantum materials. The research will be guided by Tero Heikkilä and Stefan Ilic at the Condensed Matter Theory group at the University of Jyväskylä, Finland. The positions will start on the 1st November 2023 or as agreed for a fixed term of 4 years.

Topic 1: Supercurrent diodes in disordered quantum materials

This project will theoretically investigate the recently discovered supercurrent diode effect (SDE) in new quantum materials. This effect shows up via a non-reciprocal current flow when both time-reversal and inversion symmetries are broken in the superconductor: supercurrent can flow in one direction, whereas only a regular dissipative Ohmic current can flow in the other. SDE is a useful new tool to probe microscopic properties of superconductors by simple electrical measurements, and it has a potential to provide a building block for the new generation of high-performance superconducting computing. SDE is currently a topic at the forefront of research in condensed matter physics. It is observed in a handful of systems, but many of its aspects are currently poorly understood. This project will contribute to filling this knowledge gap.

Topic 2: Exploring quantum geometric effects in flat-band superconductors

In this project you will get a chance of collaborating with the world's leading experts on flat-band superconductivity within the SuperC project (superc2033.com) and promote the grand quest of increasing the operating temperature of superconductors. One such avenue is flat-band superconductivity, where the mean-field critical temperature can be parametrically higher than in ordinary superconductors. However, ordinary flat bands have infinite effective mass and thereby the corresponding superconductors would have a vanishing critical current. According to recent research, superconductivity in flat bands is rescued by quantum geometry of the bands, a mechanism that is likely behind the observations of superconductivity in twisted bilayer graphene. However, an explicit demonstration of such effect is missing, and more theoretical and experimental research is needed. In this project you will get a chance of collaborating with the world’s leading experts on flat-band superconductivity and promote the grand quest of increasing the operating temperatures of superconductors.

Major Duties/Responsibilities

• Work as part of a team conducting basic research that advances our understanding of quantum materials.
• Learn and apply the methods of the theory of superconductivity and disordered systems: Green’s functions, quasiclassical methods, Keldysh technique, diagrammatic methods
• Work with others to maintain a high level of scientific productivity.
• Present research and publish scientific results in peer-reviewed journals in a timely fashion.
• As a Doctoral Student pursue their doctoral studies at the University of Jyväskylä, Finland

Qualifications

• A Master's degree in physics or a related field and a thesis written on a theoretical topic.
• Good basis in quantum mechanics, statistical physics and condensed matter physics
• A high proficiency in spoken and written English.
• You are expected to learn to communicate your results by writing manuscripts and giving presentations at international conferences.

The duties, qualification requirements and language skills of a Doctoral Researcher are stipulated by the University of Jyväskylä Regulations and language skills guidelines. The MSc degree required for the position must have been completed before starting the position. Doctoral Researcher needs to be also enrolled in the doctoral programme which can be applied from the Faculty of Mathematics and Science after selection for the position.

What does the University of Jyväskylä offer as an employer?

At the University of Jyväskylä, you are a recognized member of our community with a unique opportunity to influence international research. You get to participate in our international and multidisciplinary community where the welfare of each individual is important. At the University of Jyväskylä, we offer a great and lively campus area with opportunities to maintain an active and healthy lifestyle.

Finland has a high standard of living, with free schooling (also in English), affordable childcare, good family benefits, and healthcare. Jyväskylä is located in central Finland in the Finnish Lake District having excellent opportunities for different nature, outdoor, and sports activities. The City of Jyväskylä is a major educational center with a large student population and a vibrant cultural atmosphere. For more information regarding the University of Jyväskylä, the City of Jyväskylä, and living in Finland, see the University's International Staff Guide.

The annual salary for a Doctoral Researcher will be approximately 28,000 EUR (gross income, including a holiday bonus). With progress of the thesis work, the salary will be revised in accordance with the Collective Agreement of Finnish Universities. The employment starts with a trial period of six months.

How to apply?

The application documents that should be included in PDF format:

1. Curriculum vitae (CV), composed according to good scientific practice and considering the template for researcher´s curriculum vitae by The Finnish Advisory Board on Research Integrity and including contact information of two academics who can provide reference letters
2. Cover letter including a statement of research interests.
3. Relevant certificates/diplomas

For further details, please contact Professor Tero Heikkilä, tero.t.heikkila@jyu.fi or Stefan Ilic, stefan.d.ilic@jyu.fi.

The application period has been extended.