Bandwidth Control and Symmetry Breaking in a Mott-Hubbard Correlated Metal

Lishai Shoham, Maria Baskin, Tom Tiwald, Guy Ankonina, Myung Geun Han, Anna Zakharova, Shaked Caspi, Shay Joseph, Yimei Zhu, Isao H. Inoue, Cinthia Piamonteze, Marcelo J. Rozenberg, Lior Kornblum

Research output: Contribution to journalArticlepeer-review

Abstract

In Mott materials strong electron correlation yields a spectrum of complex electronic structures. Recent synthesis advancements open realistic opportunities for harnessing Mott physics to design transformative devices. However, a major bottleneck in realizing such devices remains the lack of control over the electron correlation strength. This stems from the complexity of the electronic structure, which often veils the basic mechanisms underlying the correlation strength. This study presents control of the correlation strength by tuning the degree of orbital overlap using picometer-scale lattice engineering. This study illustrates how bandwidth control and concurrent symmetry breaking can govern the electronic structure of a correlated SrVO3 model system. This study shows how tensile and compressive biaxial strain oppositely affect the SrVO3 in-plane and out-of-plane orbital occupancy, resulting in the partial alleviation of the orbital degeneracy. The spectral weight redistribution under strain is derived and explained, which illustrates how high tensile strain drives the system toward a Mott insulating state. Implementation of such concepts can push correlated electron phenomena closer toward new solid-state devices and circuits. These findings therefore pave the way for understanding and controlling electron correlation in a broad range of functional materials, driving this powerful resource for novel electronics closer toward practical realization.

Original languageEnglish
Article number2302330
JournalAdvanced Functional Materials
Volume33
Issue number41
DOIs
StatePublished - 9 Oct 2023

Keywords

  • Mott materials
  • correlated electrons
  • correlated metals
  • transition metal oxides

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Condensed Matter Physics
  • General Materials Science
  • Electrochemistry
  • Biomaterials

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