Quantum Theory of Materials

We calculate and analyse the complex structural, electronic, magnetic and transport quantities of quantum materials — for fundamental research and practical applications.

Head: Prof. Dr. Stefan Blügel

News and Events

Künstlerische Darstellung der atomaren Spitze eines Rastertunnelmikroskops beim Abtasten einer Metalloberfläche mit einem aufgelagerten Kobaltatom.

Researchers Question Fundamental Study on the Kondo Effect

Jülich, 7 January 2021 - The Kondo effect influences the electrical resistance of metals at low temperatures and generates complex electronic and magnetic orders. Novel concepts for data storage and processing, such as using quantum dots, are based on this. In 1998, researchers from the United States published spectroscopic studies on the Kondo effect using scanning tunnelling microscopy, which are considered ground-breaking and have triggered countless others of a similar kind. Many of these studies may have to be re-examined now that Jülich researchers have shown that the Kondo effect cannot be proven beyond doubt by this method. Instead, another phenomenon is creating precisely the spectroscopic “fingerprint” that was previously attributed to the Kondo effect.

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PGI Colloquium: Prof. Dr. Chris Leighton, University of Minnesota, Minneapolis, USA

Recently, incorporation of electrolytes (e.g., ionic liquids) into field-effect transistors has been shown to enable electric double layer transistors, which can induce large (1015 cm-2) carrier densities at surfaces. These correspond to substantial fractions of an electron or hole per unit cell in most materials, sufficient to electrically control electronic phase transitions.

Focus

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Wanted: Young Research Scientists!

Are you looking for an exciting, challenging Master’s, PhD or postdoctoral position? Are you interested in research involving theoretical solid state physics, and do you enjoy developing numerical and computational methods?

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Joint Lab Virtual Materials Design

The goal of the JL-VMD is the development and validation of methods for computational material development.

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Young Investigators Group Prof. Samir Lounis

Functional Nanoscale Structure Probe and Simulation Laboratory

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Young Investigators Group Dr. Marjana Ležaić

Computational Nanoferronics Laboratory