Unconventional localization of electrons inside of a nematic electronic phase

Abstract

The magnetotransport behaviour inside the nematic phase of bulk FeSe reveals unusual multiband effects that cannot be reconciled with a simple two-band approximation proposed by surface-sensitive spectroscopic probes. In order to understand the role played by the multiband electronic structure and the degree of two-dimensionality we have investigated the electronic properties of exfoliated flakes of FeSe by reducing their thickness. Based on magnetotransport and Hall resistivity measurements, we assess the mobility spectrum that suggests an unusual asymmetry between the mobilities of the electrons and holes with the electron carriers becoming localized inside the nematic phase. Quantum oscillations in magnetic fields up to 38 T indicate the presence of a hole-like quasiparticle with a lighter effective mass and a quantum scattering time three times shorter, as compared with bulk FeSe. The observed localization of negative charge carriers by reducing dimensionality can be driven by orbitally-dependent correlation effects, enhanced interband spin-fluctuations or a Lifshitz-like transition which affect mainly the electron bands. The electronic localization leads to a fragile two-dimensional superconductivity in thin flakes of FeSe, in contrast to the two-dimensional high-Tc induced with electron doping via dosing or using a suitable interface.

arXiv comment22 pages, 14 figures

References in corpus (53)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Nematic order in iron superconductors - who is in the driver's seat?
• 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
• Discovery of Orbital-Selective Cooper Pairing in FeSe
• Linear magnetoresistance caused by mobility fluctuations in the n-doped Cd3As2
• Emergence of the nematic electronic state in FeSe
• Effect of magnetic frustration on nematicity and superconductivity in Fe chalcogenides
• Dome-shaped magnetic order competing with high-temperature superconductivity at high pressures in FeSe
• Ironing out the details of unconventional superconductivity
• Evolution of high-temperature superconductivity from low-Tc phase tuned by carrier concentration in FeSe thin flakes
• Critical change in the Fermi surface of iron arsenic superconductors at the onset of superconductivity
• Strong Interplay between Stripe Spin Fluctuations, Nematicity and Superconductivity in FeSe
• Interplay of disorder and spin fluctuations in the resistivity near a quantum critical point
• Lack of coupling between superconductivity and orthorhombic distortion in stoichiometric single-crystalline FeSe
• The key ingredients of the electronic structure of FeSe
• Observation of universal strong orbital-dependent correlation effects in iron chalcogenides
• Anomalous Fermi surface in FeSe seen by Shubnikov-de Haas oscillation measurements
• Anomalous correlation effects and unique phase diagram of electron doped FeSe revealed by angle resolved photoemission spectroscopy
• On the Remarkable Superconductivity of FeSe and its Close Cousins
• Dichotomy between the hole and electrons behavior in the multiband FeSe probed by ultra high magnetic fields
• Orbital-dependent Fermi Surface shrinking as a fingerprint of nematicity in FeSe
• Variation of transition temperatures and residual resistivity ratio in vapor-grown FeSe
• Suppression of orbital ordering by chemical pressure in FeSe1-xSx
• Distinctive momentum dependence of the band reconstruction in the nematic state of FeSe thin film
• High-Tc superconductivity in FeSe at high pressure: Dominant hole carriers and enhanced spin fluctuations
• Complete Fermi surface in BaFe${}_2$As${}_2$ observed via Shubnikov-de Haas oscillation measurements on detwinned single crystals
• Evolution of the Fermi surface of the nematic superconductors FeSe1-xSx
• Formation of Hubbard-like bands as a fingerprint of strong electron-electron interactions in FeSe
• Suppression of electronic correlations by chemical pressure from FeSe to FeS
• Interatomic Coulomb interaction and electron nematic bond order in FeSe
• Electric Transport of a Single Crystal Iron Chalcogenide FeSe Superconductor: Evidence of Symmetry Breakdown Nematicity and Additional Ultrafast Dirac cone-Like Carriers
• Quantum oscillation studies of the Fermi surface of iron-pnictide superconductors
• Magnetotransport in nearly antiferromagnetic metals
• Electronic anisotropies revealed by detwinned ARPES measurements of FeSe
• Experimental Observation of Incoherent-Coherent Crossover and Orbital Dependent Band Renormalization in Iron Chalcogenide Superconductors
• Electronic nematic states tuned by isoelectronic substitution in bulk FeSe1-xSx
• Correlation between Superconductivity and Magnetic Fluctuations in Fe(Se1-xSx) Revealed by 77Se NMR
• Suppression of superconductivity and enhanced critical field anisotropy in thin flakes of FeSe
• Strain-tuning of nematicity and superconductivity in single crystals of FeSe
• Fermi surface reconstruction in FeSe under high pressure
• Non-Fermi liquid transport in the vicinity of nematic quantum critical point of FeSe${}_{1-x}$S${}_x$ superconductor
• Unconventional Hall effect in pnictides from interband interactions
• Anomalous high-magnetic field electronic state of the nematic superconductors FeSe${}_{1-x}$S${}_x$
• Contrasts in electron correlations and inelastic scattering between LiFeAs and LiFeP revealed by charge transport
• Hall coefficient signals orbital differentiation in the Hund's metal Sr${}_2$RuO${}_4$
• Transport in multiband systems with hot spots on the Fermi surface: Forward-scattering corrections
• The drastic effect of the impurity scattering on the electronic and superconducting properties of Cu-doped FeSe
• Transport anomalies due to anisotropic interband scattering
• Magnetotransport of multiple-band nearly-antiferromagnetic metals due to "hot-spot" scattering
• Unconventional localization of electrons inside of a nematic electronic phase
• Anomalous spectral weight transfer in the nematic state of iron-selenide superconductor
• Charge carrier dynamics of FeSe thin film investigated by terahertz magneto-optical spectroscopy

Cited by in corpus (6)

• Multi-band description of the upper critical field of bulk FeSe
• Unconventional localization of electrons inside of a nematic electronic phase
• Robust superconductivity and fragile magnetism induced by the strong Cu impurity scattering in the high-pressure phase of FeSe
• Unveiling the quasiparticle behaviour in the pressure-induced high-$T_c$ phase of an iron-chalcogenide superconductor
• Discovery of a new phase in thin flakes of KV${}_3$Sb${}_5$ under pressure
• Magnetotransport evidence of a potential low-lying Dirac node in NbAl${}_3$