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Rosner, Helge
Helge Rosner
Group leader

Phone: +49 351 4646-2233
Fax: +49 351 4646-4902
Room: B1.3.13

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Teaser 1503402928

Electrons choose a direction

August 22, 2017
The group “Micro Structured Quantum Matters” at MPI-CPfS develops microscopic electric conducting paths made of quantum materials to understand their physical properties and to test possible applications in new types of electronics. In cooperation with US scientists, they succeeded in showing a rare state in microchips in which electrons move together. That state is called “electronic nematicity”. It occurs in high magnetic fields in a layered metal made of cerium, rhodium and indium, called CeRhIn5. In an article published in the journal “Nature”, the scientists point to a new approach of understanding the link between electronic nematicity and superconductivity. Electrons move together in the superconductivity as well and links between the two phenomena were assumed for a long time. [more]
Teaser 1500557051

Topological Quantum Chemistry

July 20, 2017
Researchers find path to discovering new topological materials, holding promise for technological applications. [more]
Teaser 1500533731

IBM Scientists Observe Elusive Gravitational Effect in Solid-State Physics

July 19, 2017
Previously thought to only occur in the early stages of the universe and within neutron stars and black holes [more]
Teaser 1498568020

Composition of clathrates: Computational structure analysis

June 27, 2017
In a collaboration between the Fritz Haber Institute in Berlin and the department Chemical Metals Science at MPI CPfS, defect concentrations in clathrate networks and the existence of high temperature phases have been predicted theoretically. [more]
Teaser 1498117063

PETMEM Meeting

June 22, 2017
The PETMEM consortium met at MPI-CPfS Dresden on the 15th and 16th of June 2017 for the Month-18 consortium meeting. [more]
Teaser 1493104538

International Prize for Clifford Hicks

April 25, 2017
Clifford Hicks from the Physics of Quantum Materials department has won the International Young Scientist Prize in Low Temperature Physics from the International Union of Pure and Applied Physics. [more]
Teaser 1491925135

Prof. Claudia Felser receives her second ERC Advanced Grant

April 11, 2017
With this prestigious grant of the European Research Council, Claudia Felser and her team will study single crystals of topological materials and their physical properties. She will receive more than two million Euros over a period of five years. Using this grant, they plan to engineer this new class of quantum materials via the synthesis of high quality single crystals and tune their topological phase transitions, transport properties and surface states by the application of electric and magnetic fields and high pressure. To further boost topological science in Europe, a single crystal platform will be established within the project. The institute sincerely congratulates Claudia Felser on this success! [more]
Teaser 1491919437

Weak interactions under pressure: hp-CuBi and its analogues

April 11, 2017
While normal metals like cobalt or copper exhibit a strong tendency for alloy formation, heavy main group metals like bismuth show a remarkable lack of reactivity. Scientists of the Max-Planck Institute for Chemical Physics of solids could overcome this obstacle by high-pressure synthesis yielding the compounds CuBi and earlier CoBi3. A systematic analysis reveals that the superconducting properties of transition metal-bismuth compounds violate a prediction of the standard theory of super­conductivity.   [more]
Teaser 1490952600

Ajaya K. Nayak appointed Assistant Professor at the School of Physical Science, National Institute of Science Education and Research (NISER), Bhubaneswar, India

March 31, 2017
Ajaya K. Nayak has been working in the group of Prof. Claudia Felser since 2011. Recently, he has been appointed as an Assistant Professor at the "School of Physical Science, National Institute of Science Education and Research (NISER), Bhubaneswar, India". In the new institute, he will be continuing his research on skyrmions and other related topics in collaboration with Prof. Felser. [more]
Teaser 1490944341

Symposium on Heusler compounds as hardmagnetic materials

March 24, 2017
The symposium was organized by a joint initiative of the Max Planck Institute for Chemical Physics of Solids in Dresden, the Max Planck Institute of Microstructure Physics in Halle, the Fraunhofer Institute for Microstructure of Materials and Systems in Halle, and the Fraunhofer Institute for Mechanics of Materials in Freiburg. The goal of the symposium was to present and to discuss current concepts and latest advancements of Heusler compounds as hardmagnetic materials with participation of industrial partners. [more]
Teaser 1490360098

Weyl semimetals split water

March 24, 2017
Catalysis significantly affects our way of life. Catalysis plays an important role in many biological and technological processes.  For example, the world’s food supply is based on a famous catalytic process – the Haber Bosch process, that converts hydrogen and nitrogen into ammoniac which is then used as the central ingredient for fertilizers.  Gaining improved understanding of catalysis at the fundamental level of atomic orbitals, chemical interactions, energetics and symmetry is a very active field in chemistry. [more]
Teaser 1489565208

Springer Thesis Prize for Stephen Edkins

March 14, 2017
Stephen Edkins from the Physics of Quantum Materials department has won a Springer Thesis Prize for his PhD dissertation entitled ‘Visualising the Charge and Cooper Pair Density Waves in Cuprates’.   [more]
Teaser 1487750909

From graphite and nitrogen to CCN3– in just one step

February 22, 2017
The elements carbon and nitrogen are generally unreactive. Therefore, reactive precursors like ammonia are usually employed for C–N bond-formation in organic synthesis. Surprisingly, MPI scientists were able to synthesize CCN3– – a quasi organic molecular anion searched for since decades – using elemental C and N. The anion is stabilized in the bulk host framework of the nitridometalate Ba5[TaN4][C2N]. The reactivity of CCN3– might be of use in organic synthesis. [more]
Teaser 1490617489

Sanjay Singh leaving for the School of Materials Science and Technology at the Indian Institute of Technology (IIT-BHU), Varanasi, India

February 13, 2017
Sanjay Singh has been working as a group leader in the Solid State Chemistry department of Prof. Claudia Felser. He has joined as an assistant professor in the School of Materials Science and Technology at the Indian Institute of technology (IIT-BHU), Varanasi, India. He will be actively collaborating with Prof. Claudia Felser and his colleagues in MPI-CPfS. [more]
Teaser 1486715329

Binghai Yan leaving for the Weizmann Institute of Science, Israel

February 10, 2017
Binghai Yan has been working as a group leader in the solid-state chemistry department of Prof. Claudia Felser since 2012. In Feb 2017 he is appointed as an assistant professor in the department of condensed matter physics, Weizmann Institute of Science, Israel. In the new institute, he will continue his theoretical research on emerging topological materials, not least in cooperation with the Felser group. [more]
Teaser 1486027053

Alexander von Humboldt fellow Emilia Morosan joins Solid State Chemistry group of MPI CPfS

February 02, 2017
Emilia Morosan is a professor of Physics and Astronomy, Chemistry, and Materials Science and Nanoengineering at Rice University. Her research focuses on the design and synthesis of new compounds with unconventional electronic and magnetic ground states, with particular interest in superconductivity, local and itinerant electron magnetism, heavy fermions, quantum phase transitions and more. [more]
Teaser 1485336023

Discovery of tip induced superconductivity in Weyl semimetal

January 25, 2017
A Weyl semimetal is a topologically non-trivial phase of matter that hosts mass-less Weyl fermions, particles that remained elusive for more than 80 years since their theoretical prediction by the German mathematical physicist Hermann Weyl in 1929, but discovered experimentally only in 2015. [more]
Teaser 1484916691

Unconventional superconductor feeling the strain

January 20, 2017
Finely tuning modern materials can lead to dramatic changes: With uniaxial strain we achieved a topological change of the electronic structure in the unconventional superconductor Sr2RuO4. At the same time its transition temperature is more than doubled and results under applied fields yield more information about the nature of the superconductivity in this material. [more]
Teaser 1484735555

The ever expanding family of topological materials: multiple Dirac cones established in LaBi

January 18, 2017
Scientists from the Max Plank Institute for Chemical Physics of Solids in Dresden have explored the electronic structure of LaBi and have observed the existence of three Dirac cones: two that coexist at the corner and one at the center of its Brillouin zone. Thus, they have unambiguously proven the topological character of LaBi.   [more]
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