5 papers
Superconductivity mediated by nematic fluctuations -- the dispersion of collective modes
Kazi Ranjibul Islam, Andrey Chubukov
We analyze the spectrum of collective modes in a superconductor in which pairing is mediated by long-range nematic fluctuations. Previous experimental and theoretical studies have…
Generic deformation channels for critical Fermi surfaces including the impact of collisions
Kazi Ranjibul Islam, Aditya Savanur, Ipsita Mandal
This paper constitutes a sequel to our theoretical efforts to determine the nature of generic low-energy deformations of the Fermi surface of a quantum-critical metal, which arises…
Spatially resolved collective modes in d-wave superconductors
Kazi Ranjibul Islam, Samuel Awelewa, Andrey V. Chubukov +1
We analyze the dispersion of collective modes in a superconductor with wave symmetry of the order parameter in the presence of long-range Coulomb interaction. We use diagrammat…
Origin of sublattice particle-hole asymmetry in monolayer FeSe superconductors
Mercè Roig, Kazi Ranjibul Islam, Basu Dev Oli +7
In iron-based superconductors, the two Fe atoms in the unit cell are typically related by crystal symmetries; therefore, we expect no intra-unit cell variations in the superconduct…
Unconventional Superconductivity Mediated by Nematic Fluctuations in a Multi-Orbital System -- Application to doped FeSe
Kazi Ranjibul Islam, Andrey Chubukov
We analyze superconductivity in a multi-orbital fermionic system near the onset of a nematic order, using doped FeSe as an example. We associate nematicity with a spontaneous polar…