Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 46: Poster Session: Frustrated Magnets, Quantum Magnets, Charge Order and Complex Oxids

TT 46.4: Poster

Mittwoch, 18. März 2020, 15:00–19:00, P2/2OG

Strain-induced metal-to-insulator transitions in spinel oxide thin films — •Tim Schweizer1,2, Ulrike Niemann1,2, Dennis Huang1, and Hidenori Takagi1,2,31Max Planck Institute for Solid State Research, Stuttgart, Germany — 2Institute for Functional Matter and Quantum Technologies, University of Stuttgart, Germany — 3Department of Physics, University of Tokyo, Japan

Spinel compounds with underlying pyrochlore lattice are known playgrounds for geometric frustration. In particular, LiV2O4 has attracted considerable attention due to its unconventional heavy fermion phase, which emerges at low temperatures in the absence of localized f electrons [1]. Recent studies have shown that metallic LiV2O4 can be driven into an insulating, charge-ordered state by applying epitaxial strain in the thin-film limit. Such an observation hints at the role of charge frustration and quantum criticality in the heavy fermion phase of LiV2O4. Using pulsed laser deposition, we studied thin films of LiV2O4 (strained and unstrained), and compared them with thin films of the distorted spinel AlV2O4, where a charge-ordered state was previously reported in powder samples [2].

[1] C. Urano et al., Phys. Rev. Lett. 85, 1052 (2000)

[2] K. Matsuno et al., JPS Journal, 70, 1456-1459 (2001)

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