Robust superconductivity and fragile magnetism induced by the strong Cu impurity scattering in the high-pressure phase of FeSe
arXiv:2212.06128 · doi:10.1103/PhysRevResearch.4.043123
Abstract
Superconductivity in FeSe is strongly enhanced under applied pressure and it is proposed to emerge from anomalously coupled structural and magnetic phases. Small impurities inside the Fe plane can strongly disrupt the pair formation in FeSe at ambient pressure and can also reveal the interplay between normal and superconducting phases. Here, we investigate how an impurity inside the Fe plane induced by the Cu substitution can alter the balance between competing electronic phases of FeSe at high pressures. In the absence of an applied magnetic field, at low pressures the nematic and superconducting phases are suppressed by a similar factor. On the other hand, at high pressures, above 10 kbar, the superconductivity remains unaltered despite the lack of any signature in transport associated to a magnetic phase in zero-magnetic field. However, by applying a magnetic field, the resistivity displays an anomaly preceding the activated behaviour in temperature, assigned to a magnetic anomaly. We find that the high-pressure superconducting phase of FeSe is robust and remains enhanced in the presence of Cu impurity, whereas the magnetic phase is not. This could suggest that high- superconductivity has a sign-preserving order parameter in a presence of a rather glassy magnetic phase.
arXiv comment13 pages, 9 figures
References in corpus (40)
- Superconductivity at 36 K in beta-Fe1.01Se with the compression of the interlayer separation under pressure
- Superconductivity at 27 K in tetragonal FeSe under high pressure
- Pressure evolution of low-temperature crystal structure and bonding of 37 K FeSe superconductor
- Dome-shaped magnetic order competing with high-temperature superconductivity at high pressures in FeSe
- The key ingredients of the electronic structure of FeSe
- Pressure Induced Static Magnetic Order in Superconducting FeSe_1-x
- Pressure-induced high-Tc superconducting phase in FeSe: correlation between anion height and Tc
- Precise Pressure Dependence of the Superconducting Transition Temperature of FeSe: Resistivity and ^77Se--NMR Study
- Coexistence of Superconductivity and Magnetism in FeSe_1-x under Pressure
- Disorder induced transition between s_+- and s_++ states in two-band superconductors
- Dichotomy between the hole and electrons behavior in the multiband FeSe probed by ultra high magnetic fields
- Maximizing Tc by tuning nematicity and magnetism in FeSe1-xSx superconductors
- High temperature superconductivity (Tc onset at 34K) in the high pressure orthorhombic phase of FeSe
- Variation of transition temperatures and residual resistivity ratio in vapor-grown FeSe
- Suppression of orbital ordering by chemical pressure in FeSe1-xSx
- Pressure-induced antiferromagnetic transition and phase diagram in FeSe
- High-Tc superconductivity in FeSe at high pressure: Dominant hole carriers and enhanced spin fluctuations
- Superconducting and normal phases of FeSe single crystals at high pressure
- Pressure Induced Stripe-order Antiferromagnetism and First-order Phase Transition in FeSe
- Metal - Insulator transition in Fe1.01-xCuxSe
- Enhancing Superconductivity by Disorder
- Enhanced Superconductivity on the Tetragonal Lattice in FeSe under Hydrostatic Pressure
- Quenched nematic criticality separating two superconducting domes in an iron-based superconductor under pressure
- Pressure-induced high-temperature superconductivity retained at ambient
- Disorder-induced freezing of dynamical spin fluctuations in underdoped cuprates
- Dome of magnetic order inside the nematic phase of sulfur-substituted FeSe under pressure
- Impurities in multiband superconductors
- Anomalous high-magnetic field electronic state of the nematic superconductors FeSeS
- Magnetotransport study of the pressure-induced antiferromagnetic phase in FeSe
- Origin of electronic dimers in the spin-density wave phase of Fe-based superconductors
- Bulk superconductivity and role of fluctuations in the iron-based superconductor FeSe at high pressures
- Theoretical study of impurity-induced magnetism in FeSe
- Distinct pressure evolution of coupled nematic and magnetic order in FeSe
- The drastic effect of the impurity scattering on the electronic and superconducting properties of Cu-doped FeSe
- Impact of Nematicity on the Relationship between Antiferromagnetic Fluctuations and Superconductivity in FeSe0.91S0.09 Under Pressure
- Spin and pair density wave glasses
- Synergy and competition between superconductivity and antiferromagnetism in FeSe under pressure
- Unconventional localization of electrons inside of a nematic electronic phase
- Cu doping effects on the electronic structure of Fe1-xCuxSe
- Fragile pressure-induced magnetism in FeSe superconductors with a thickness reduction