Nao Takeshita

The disorder-free non-BCS superconductor Cs3C60 emerges from an antiferromagnetic insulator parent state.

The body-centered cubic A15-structured cesium fulleride Cs3C60 is not superconducting at ambient pressure and is free from disorder, unlike the well-studied face-centered cubic A3C60 alkali metal fulleride superconductors. We found that in Cs3C60, where the molecular valences are precisely assigned, the superconducting state at 38 kelvin emerges directly from a localized electron antiferromagnetic insulating state with the application of pressure. This transition maintains the threefold degeneracy of the active orbitals in both competing electronic states; it is thus a purely electronic transition to a superconducting state, with a dependence of the transition temperature on pressure-induced changes of anion packing density that is not explicable by Bardeen-Cooper-Schrieffer (BCS) theory.

Pressure-induced high-Tc superconducting phase in FeSe: Correlation between anion height and Tc

In this study, we performed high-pressure electrical resistivity measurements of polycrystalline FeSe in the pressure range of 1\char21{}16.0 GPa at temperatures of 4\char21{}300 K. A precise evaluation of

Possible Multiple Gap Superconductivity with Line Nodes in Heavily Hole-Doped Superconductor KFe2As2 Studied by 75As Nuclear Quadrupole Resonance and Specific Heat

{T}_{c}

First Investigation of Pressure Effects on Transition from Superconductive to Metallic Phase in FeSe0:5Te0:5

from zero-resistivity temperatures revealed that

75As NMR Study of Hole-Doped Superconductor Ba1-xKxFe2As2 (Tc≃38 K)

{T}_{c}

Appearance of pressure-induced superconductivity in BaFe2As2 under hydrostatic conditions and its extremely high sensitivity to uniaxial stress

shows a slightly distorted dome-shaped curve with maximum

Suppression of Magnetic Order by Pressure in BaFe2As2

{T}_{c}^{\text{offset}}

Zero Resistivity above 150 K in HgBa2Ca2Cu3O8+δ at High Pressure

(30 K) at 6 GPa. With the application of pressure, the temperature dependence of resistivity above

Gigantic Anisotropic Uniaxial Pressure Effect on Superconductivity within the CuO2 Plane of La1.64Eu0.2Sr0.16CuO4: Strain Control of Stripe Criticality

{T}_{c}

Robustness of non-fermi-liquid behavior near the ferromagnetic critical point in clean ZrZn2

changes dramatically to a linear dependence, that the high-