Electronic Phases of Oxide Heterostructures Tailored on the Nanoscale

T. Kopp, G. Hammerl

Publications

  • R. Frésard, K. Steffen, T. Kopp, Bad metal and negative compressibility transitions in a two-band Hubbard model, Phys. Rev. B 105, 245118 (2022) [G5]
  • A. Fünfhaus, T. Kopp, E. Lettl, Winding vectors of topological defects: Multiband Chern numbers, J. Phys. A: Math. Theor. 55, 405202 (2022) [G5,E5]
  • R. Bartel, E. Lettl, P. Seiler, T. Kopp, G. Hammerl, Magnetotransport of Functional Oxide Heterostructures Affected by Spin-Orbit Coupling: a Tale of Two-Dimensional Systems, Phys. Status Solidi B 259, 2100154 (2022) [G5]
  • C. Morice, E. Lettl, T. Kopp, A. Kampf, Optical conductivity and resistivity in a four-band model for {\normalfont ZrTe$_5$} from ab initio calculations, Phys. Rev. B 102, 155138 (2020) [G5,E5]
  • C. Yin, P. Seiler, L. M. K. Tang, I. Leermakers, N. Lebedev, U. Zeitler, J. Aarts, Tuning Rashba spin-orbit coupling at {\normalfont LaAlO$_3$/SrTiO$_3$} interfaces by band filling, Phys. Rev. B 101, 245114 (2020) [G5]
  • P. Seiler, R. Bartel, T. Kopp, G. Hammerl, Electronic transport in thin films of {\normalfont BaPbO$_3$}: Unraveling two-dimensional quantum effects , Phys. Rev. B 100, 165402-8 (2019) [G5]
  • P. Seiler, E. Lettl, D. Braak, T. Kopp, Weak antilocalization within a genuine multiband model, Phys. Rev. B 100, 115415 (2019) [G5]
  • P. Seiler, E. Lettl, D. Braak, T. Kopp, Antilocalization in oxides: Effective spin-$\frac{3}{2}$ model, Phys. Rev. B 100, 121404(R) (2019) [G5]
  • I. I. Piyanzina, V. Eyert, Yu. V. Lysogorskiy, D. A. Tayurskii, T. Kopp, Oxygen vacancies and hydrogen doping in {\normalfont LaAlO$_3$/SrTiO$_3$} heterostructures: electronic properties and impact on surface and interface reconstruction, J. Phys.: Condens. Matter 31, 295601 (2019) [G5]
  • M. Reiner, T. Gigl, R. Jany, G. Hammerl, C. Hugenschmid, Impact of oxygen diffusion on superconductivity in {\normalfont YBa$_2$Cu$_3$O$_{7-\delta}$} thin films studied by positron annihilation spectroscopy, Phys. Rev. B 97, 144503, 1 (2018) [G5]
  • P. Seiler, J. Zabaleta, R. Wanke, J. Mannhart, T. Kopp, D. Braak, Antilocalization at an oxide interface, Phys. Rev. B 97, 075136 (2018) [G5]

Short Summary

Functionality will be a dominating aspect of our research on oxide heterostructures: what is the impact of artificially incorporated inhomogeneities such as grain boundaries, charged defects or dislocations on the electronic reconstruction at a metallic interface, and how do surface defects act on the interface electronic state? We will focus on magneto-transport, electronic compressibility and on the modulation of interface confined superconductivity by geometrical constraints or external fields. We will investigate experimentally and theoretically the BKT transition to a superconducting interface state characterized by a non-trivial topological invariant.