Imaging Orbital-selective Quasiparticles in the Hund's Metal State of FeSe

Abstract

Strong electronic correlations, emerging from the parent Mott insulator phase, are key to copper-based high temperature superconductivity (HTS). By contrast, the parent phase of iron-based HTS is never a correlated insulator. But this distinction may be deceptive because Fe has five active d-orbitals while Cu has only one. In theory, such orbital multiplicity can generate a Hund's Metal state, in which alignment of the Fe spins suppresses inter-orbital fluctuations producing orbitally selective strong correlations. The spectral weights $Z_m$ of quasiparticles associated with different Fe orbitals m should then be radically different. Here we use quasiparticle scattering interference resolved by orbital content to explore these predictions in FeSe. Signatures of strong, orbitally selective differences of quasiparticle $Z_m$ appear on all detectable bands over a wide energy range. Further, the quasiparticle interference amplitudes reveal that $Z_{xy}<Z_{xz}<<Z_{yz}$, consistent with earlier orbital-selective Cooper pairing studies. Thus, orbital-selective strong correlations dominate the parent state of iron-based HTS in FeSe.

arXiv commentfor movie M1, see http://www.physik.uni-leipzig.de/~kreisel/osqp/M1.mp4, for movie M2, see http://www.physik.uni-leipzig.de/~kreisel/osqp/M2.mp4, for movie M3, see http://www.physik.uni-leipzig.de/~kreisel/osqp/M3.mp4, for movie M4, see http://www.physik.uni-leipzig.de/~kreisel/osqp/M4.mp4, for movie M5, see http://www.physik.uni-leipzig.de/~kreisel/osqp/M5.mp4

References in corpus (30)

• Correlated Electrons in High Temperature Superconductors
• High-temperature superconductivity in iron-based materials
• Strong electronic correlations from Hund's coupling
• Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides
• Coherence-incoherence crossover in the normal state of iron-oxypnictides and importance of the Hund's rule coupling
• Field-induced superconducting phase of FeSe in the BCS-BEC cross-over
• Discovery of Orbital-Selective Cooper Pairing in FeSe
• Emergence of the nematic electronic state in FeSe
• Selective Mottness as a key to iron superconductors
• Janus-faced influence of the Hund's rule coupling in strongly correlated materials
• Orbital-Selective Mott transition out of band degeneracy lifting
• Imaging the Fano Lattice to 'Hidden Order' Transition in URu2Si2
• Theoretical evidence for strong correlations and incoherent metallic state in FeSe
• Imaging Cooper Pairing of Heavy Fermions in CeCoIn5
• The key ingredients of the electronic structure of FeSe
• Anomalous Fermi surface in FeSe seen by Shubnikov-de Haas oscillation measurements
• Role of the orbital degree of freedom in iron-based superconductors
• Orbital selective pairing and gap structures of iron-based superconductors
• The wave-vector power spectrum of the local tunnelling density of states: ripples in a d-wave sea
• Momentum-dependent sign-inversion of orbital polarization in superconducting FeSe
• Evidence for unidirectional nematic bond ordering in FeSe
• Orbital Selectivity in Hund's metals: The Iron Chalcogenides
• Electronic correlations in Hund metals
• Mott Transition in Multi-Orbital Models for Iron Pnictides
• Electronic anisotropies revealed by detwinned ARPES measurements of FeSe
• Orbital-selective superconductivity, gap anisotropy and spin resonance excitations in a multiorbital t-J1-J2 model for iron pnictides
• Heavy d-Electron Quasiparticle Interference and Real-space Electronic Structure of Sr3Ru2O7
• Orbital selectivity enhanced by nematic order in FeSe
• Hidden Order Transition in URu2Si2 and the Emergence of a Coherent Kondo Lattice
• Orbital-Selective Superconductivity and the Effect of Lattice Distortion in Iron-Based Superconductors

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