Observation of a Novel Orbital Selective Mott Transition inCa1.8Sr0.2RuO4

2008/08/03 by Madhab Neupane, M. Neupane, P. Richard +15 · 6 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.103.097001

published as Physical Review Letters 103, 097001 (2009)

arxiv created 2008/08/03 · openalex publication_date 2009/08/25 · arxiv updated 2011/04/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We observed a novel orbital selective Mott transition in Ca(1.8)Sr(0.2)RuO(4) by angle-resolved photoemission. While two sets of dispersing bands and the Fermi surface associated with the doubly degenerate d(yz) and d(zx) orbitals are identified, the Fermi surface associated with the wider d(xy) band is missing as a consequence of selective Mott localization. Our theoretical calculations demonstrate that this orbital selective Mott transition is mainly driven by the combined effects of interorbital carrier transfer, superlattice potential, and orbital degeneracy, whereas the bandwidth difference plays a less important role.

Citations

• Heavy-Electron Behavior and Structural Change in Ca1.7Sr0.3RuO4
• The Orbital Selective Mott Transition in a Three Band Hubbard model: a Slave Boson Mean Field Study

Cited by

• Current-induced strong diamagnetism in the Mott insulator Ca 2 RuO 4
• Orbital-selective confinement effect of Ru 4d orbitals in SrRuO3 ultrathin film
• Emergence of low-energy electronic states in oxygen-controlled Mott insulator Ca2RuO 4 + δ
• Orbitally selective breakdown of the Fermi liquid and simultaneous enhancement of metallic and insulating states in correlated multiband systems with spin-orbit coupling
• Optical study of the antiferromagnetic ordered state in electron-overdopedCa0.77Nd0.23FeAs2
• Local Spin Excitations Mediate Quasiparticle Breakdown in the Orbital-Selective Mott Phase

Related

• Observation of Kondo hybridization with an orbital-selective Mott phase in 4d Ca2-xSrxRuO4
• The Orbital Selective Mott Transition in a Three Band Hubbard model: a Slave Boson Mean Field Study
• Fermi surface topology of Ca_1.5Sr_0.5RuO₄ determined by ARPES
• Three-Dimensional Bulk Electronic Structures of Ca1.5Sr0.5RuO4 Studied by Soft X-ray Angle-Resolved Photoemission
• Influence of Fermi Surface Geometry and Van Hove Singularities on the Optical Response of Sr₂RuO₄