简介:A recent report of room temperature superconductivity at ambient pressure in Cu-substituted
apatite (‘LK99’) has invigorated interest in the understanding of what materials and mechanisms
can allow for high-temperature简介:A recent report of room temperature superconductivity at ambient pressure in Cu-substituted
apatite (‘LK99’) has invigorated interest in the understanding of what materials and mechanisms
can allow for high-temperature superconductivity. Here I perform density functional theory calculations
on Cu-substituted lead phosphate apatite, identifying correlated isolated flat bands at the
Fermi level, a common signature of high transition temperatures in already established families of
superconductors. I elucidate the origins of these isolated bands as arising from a structural distortion
induced by the Cu ions and a chiral charge density wave from the Pb lone pairs. These results
suggest that a minimal two-band model can encompass much of the low-energy physics in this system.
Finally, I discuss the implications of my results on possible superconductivity in Cu-doped
apatite.详细>