Interplay of slow charge carrier dynamics and elastic effects in correlated multi-phase systems via noise spectroscopy (B02)

• Subject Area: Experimental Condensed Matter Physics
• Term: since 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 422213477

The project will apply conductance and resistance fluctuation (noise) spectroscopy, under both hydrostatic and uniaxial pressure, to investigate the slow fluctuations that arise in different phases of correlated electron systems, or drive electronic or magnetic transitions, which are coupled to the elastic degrees of freedom. Target materials are (i) organic charge-transfer salts as bulk crystals and thin film field-effect-transistor structures where peculiar electron-glass states will be explored dependent on the lattice anisotropy, electronic ferroelectricity exhibiting dipolar glassiness, and band-filling-induced Mott criticality. In (ii) antiferromagnetic EuT2X2, showing colossal magnetoresistance effects, the project will study the origin of large fluctuation effects and their anisotropy by probing the coupling to uniaxial strain aiming at enhancing the magnetic properties.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 288: Elastic Tuning and Response of Electronic Quantum Phases of Matter (ELASTO-Q-MAT)
• Applicant Institution: Goethe-Universität Frankfurt am Main
• Project Head: Professor Dr. Jens Müller