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Title: Signatures of Mottness and Hundness in archetypal correlated metals

Journal Article · · Nature Communications
ORCiD logo [1];  [2];  [1];  [3]; ORCiD logo [2];  [1]
  1. Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy
  2. Ludwig Maximilian Univ. of Munich, Munich (Germany). Physics Dept. Arnold Sommerfeld Center for Theoretical Physics and Center for NanoScience
  3. Ludwig Maximilian Univ. of Munich, Munich (Germany). Physics Dept. Arnold Sommerfeld Center for Theoretical Physics and Center for NanoScience; Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
+ Show Author Affiliations

Physical properties of multi-orbital materials depend not only on the strength of the effective interactions among the valence electrons but also on their type. Strong correlations are caused by either Mott physics that captures the Coulomb repulsion among charges, or Hund physics that aligns the spins in different orbitals. We identify four energy scales marking the onset and the completion of screening in orbital and spin channels. The differences in these scales, which are manifest in the temperature dependence of the local spectrum and of the charge, spin and orbital susceptibilities, provide clear signatures distinguishing Mott and Hund physics. We illustrate these concepts with realistic studies of two archetypal strongly correlated materials, and corroborate the generality of our conclusions with a model Hamiltonian study.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0012704
OSTI ID:
1624155
Journal Information:
Nature Communications, Vol. 10, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Strongly Correlated Materials from a Numerical Renormalization Group Perspective: How the Fermi-Liquid State of Sr 2 RuO 4 Emerges journal January 2020
Orbital-selective bad metals due to Hund's rule and orbital anisotropy: A finite-temperature slave-spin treatment of the two-band Hubbard model journal November 2019
Strain tuning of plasma frequency in vanadate, niobate, and molybdate perovskite oxides journal August 2019
Strain Tuning of Plasma Frequency in Vanadate, Niobate, and Molybdate Perovskite Oxides text January 2019

Figures / Tables (5)

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