17 citations · 39 across the 7 of their papers we have counts for
7 papers
Drumhead surface states and their signatures in quasiparticle scattering interference
Mehdi Biderang, Andreas Leonhardt, Nimisha Raghuvanshi +2
We consider a two-orbital tight-binding model defined on a layered three-dimensional hexagonal lattice to investigate the properties of topological nodal lines and their associated…
Multi-orbital quantum antiferromagnetism in iron pnictides --- effective spin couplings and quantum corrections to sublattice magnetization
Sayandip Ghosh, Nimisha Raghuvanshi, Shubhajyoti Mohapatra +2
Towards understanding the multi-orbital quantum antiferromagnetism in iron pnictides, effective spin couplings and spin fluctuation induced quantum corrections to sublattice magnet…
Orbital order, spin waves, and doping effects in the SDW state --- comparative study of the three band models for iron pnictides
Nimisha Raghuvanshi, Avinash Singh
Aimed at identifying the role of microscopic Hamiltonian parameters on spin wave excitations, orbital order, and magnetic moments in the SDW state, two different three band…
Magneto-orbital coupling in iron pnictides
Sayandip Ghosh, Nimisha Raghuvanshi, Avinash Singh
A magneto-orbital coupling mechanism is proposed to account for the weak energy gap at the Fermi energy in the ordered SDW state of a realistic three band model for iron pn…
Magnetic excitations in iron pnictides
Nimisha Raghuvanshi, Sayandip Ghosh, Rajyavardhan Ray +2
Spin wave dispersion and damping are investigated in the metallic SDW state of different itinerant electron models including a small interlayer hopping. Magnetic excitations in iro…
Role of Hund's coupling in stabilization of the (0,pi) ordered SDW state within the minimal two-band model for iron pnictides
Nimisha Raghuvanshi, Avinash Singh
Spin wave excitations and stability of the (0,pi) ordered SDW state are investigated within the minimal two-band model for iron pnictides including a Hund's coupling term. The SDW…
Spin waves in the (0,pi) and (0,pi,pi) ordered SDW states of the t-t' Hubbard model: Application to doped iron pnictides
Nimisha Raghuvanshi, Avinash Singh
Spin waves in (0,pi) and (0,pi,pi) ordered spin-density-wave (SDW) states of the t-t' Hubbard model are investigated at finite doping. In the presence of small t', these composite…