Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 19: Poster Session: Correlated Electrons 1

TT 19.55: Poster

Montag, 20. März 2017, 15:00–19:00, P2-EG

Microstructuring Quantum Materials — •Toni Helm, Maja Bachmann, Kimberly Modic, Kent Shirer, Markus König, Sebastian Seifert, Nabhanila Nandi, Andrew Mackenzie, and Philip Moll — Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

In ‘Quantum materials‘, non-trivial quantum mechanics leads to unusual physical properties that promise the potential to improve our understanding of many body quantum states as well as to spark ideas for novel electronic applications exploiting these unusual properties. Our research focuses on the mesoscale physics of quantum matter, in particular topological matter, unconventional superconductors and magnetic metals when their dimensions become comparable to their relevant length scales on the micron and sub-micron level. We develop techniques based on focused ion beam (FIB) micromachining to fabricate mesoscopic devices from single crystals. We showcase three examples of the wide range of materials and applications approachable by microstructuring: We show (1) how Fermi arc surface states contribute to the charge transport in microstructures of the Dirac semi-metal Cd3As2 on length scales smaller than the mean-free-path; (2) how a subtle phase transition just above the superconducting transition changes the electronic structure in the quasi-1D metal Ta4Pd3Te16, revealed by resistivity anisotropy measurements on the micron-scale and (3) how micro-channels of ultra-pure metals with electron-electron scattering such as PdCoO2 can lead to hydrodynamic corrections to the standard ballistic transport.

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DPG-Physik > DPG-Verhandlungen > 2017 > Dresden