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Tuning Topological Materials by hydrostatic Pressure and uniaxial Stress

Project description

Research probes topological phases in strongly correlated systems

Topological phases of matter are one of the most exciting fields in condensed matter physics. Such exotic states of matter demonstrate unusual electronic properties, such as extremely large magnetoresistance and anomalous Hall effect, that could be leveraged in future electronics and quantum computing. Funded by the Marie Skłodowska-Curie Actions programme, the TopoPress project aims to explore the interplay between strong electronic correlations and non-trivial topological phases in Ce-based compounds. Project findings will significantly increase understanding of strongly correlated electron systems and topological materials.

Objective

The discovery of topological phases of matter has driven the attention of great part of the solid-state science community due to its high for future applications, led by the presence of unusual electronic properties, such as extreme large magnetoresistance and anomalous Hall effect. However, topological phases on Ce-based nonsymmorphic materials are rather unexplored. The nonsymmorphic crystalline structure may create band crossings, which are needed for the existence of non-trivial topological phases, while the presence of magnetic Ce ions gives rise to many complex effects, such as magnetism and the Kondo effect. These correlated phenomena result in a promising route to pin the band crossings of nonsymmorphic compounds close to the Fermi level, favoring non-trivial topological effects in transport properties, which may lead to the realization of new spintronic devices. This proposal aims to understand the interplay between strong electronic correlations and non-trivial topological phases in Ce-based compounds. To achieve that hydrostatic pressure and/or uniaxial stress will be used to tune the electronic bands, i.e. moving the band crossings towards the Fermi energy and/or modify the bandstructure, and the magnetic correlations in Ce-based nonsymmorphic compounds, such as CeAlGe and CeSbTe. By performing electrical transport experiments under applied pressure/stress and in magnetic fields, the evolution and interrelation between non-trivial topological phases and strong electronic correlations will be investigated. As part of the experimental work, a new technique will be developed, which combines micro-structured samples with Bridgman or diamond anvil cells. This method will enable the simultaneous realization of magnetoresistance and Hall measurements up to more than 30 GPa. Our findings will significantly enhance the knowledge in strongly correlated electrons systems and topological materials, two fundamental areas of condensed matter physics.

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Topic(s)

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Funding Scheme

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MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)

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Call for proposal

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(opens in new window) H2020-MSCA-IF-2020

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Coordinator

MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 174 806,40
Address
HOFGARTENSTRASSE 8
80539 MUNCHEN
Germany

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Region
Bayern Oberbayern München, Kreisfreie Stadt
Activity type
Research Organisations
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 174 806,40
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