34 citations · 145 across the 17 of their papers we have counts for
17 papers
Weak-coupling altermagnetism and chiral magnetic excitations in a checkerboard lattice
Abhigya Rangari, Manna Paul, Sayandip Ghosh
Altermagnets, characterized by spin-split electronic bands with compensated magnetic moments, have emerged as a new class of magnetic materials garnering attention in recent years.…
Quantized topological energy pumping and Weyl points in Floquet synthetic dimensions with a driven-dissipative photonic molecule
Sashank Kaushik Sridhar, Sayan Ghosh, Avik Dutt
Topological effects manifest in a wide range of physical systems, such as solid crystals, acoustic waves, photonic materials and cold atoms. These effects are characterized by `top…
Detection of phonon helicity in nonchiral crystals with Raman scattering
Selçuk Parlak, Sayandip Ghosh, Ion Garate
Recently, it has been predicted that the Berry curvature of electrons can produce an angular momentum for phonons. In systems with time-reversal symmetry, the direction of the phon…
Plasmon-magnon interactions in two-dimensional honeycomb magnets
Sayandip Ghosh, Guido Menichetti, Mikhail I. Katsnelson +1
Two-dimensional honeycomb ferromagnets offer the unprecedented opportunity to study interactions between collective modes that in standard bulk ferromagnets do not cross paths. Ind…
Orbital entangled antiferromagnetoc order and spin-orbit-distortion exciton in
Shubhajyoti Mohapatra, Dheeraj Kumar Singh, Rajyavardhan Ray +2
With electron filling in the compound, the octahedrally coordinated orbitals are strongly active due to tetragonal distortion induced crystal fiel…
Simulation of Nuclear Recoils due to Supernova Neutrino-induced Neutrons in Liquid Xenon Detectors
Sayan Ghosh, Abhijit Bandyopadhyay, Pijushpani Bhattacharjee +3
Neutrinos from supernova (SN) bursts can give rise to detectable number of nuclear recoil (NR) events through the coherent elastic neutrino-nucleus scattering (CENS) process in…
Leggett-Garg inequality in Markovian quantum dynamics: role of temporal sequencing of coupling to bath
Sayan Ghosh, Anant V. Varma, Sourin Das
We study Leggett-Garg inequalities (LGIs) for a two level system (TLS) undergoing Markovian dynamics described by unital maps. We find analytic expression of LG parameter (…
Measurements of gamma ray, cosmic muon and residual neutron background fluxes for rare event search experiments at an underground laboratory
Sayan Ghosh, Shubham Dutta, Naba Kumar Mondal +1
Ambient radiation background contributed by the penetrating cosmic ray particles and the radionuclides present in the rock materials have been measured at an underground laboratory…
Inelastic charged current interaction of supernova neutrinos in two-phase liquid xenon dark matter detectors
Pijushpani Bhattacharjee, Abhijit Bandyopadhyay, Sovan Chakraborty +3
It has been known that neutrinos from supernova (SN) bursts can give rise to nuclear recoil (NR) signals arising from coherent elastic neutrino-nucleus scattering (CENS) interac…
Leptophilic-portal Dark Matter in the Light of AMS-02 positron excess
Sayan Ghosh, Amit Dutta Banik, Eung Jin Chun +1
We revisit dark matter annihilation as an explanation of the positron excess reported recently by the AMS-02 satellite-borne experiment. To this end, we propose a particle dark mat…
Dynamical density and spin response of Fermi arcs and their consequences for Weyl semimetals
Sayandip Ghosh, Carsten Timm
Weyl semimetals exhibit exotic Fermi-arc surface states, which strongly affect their electromagnetic properties. We derive analytical expressions for all components of the composit…
Charge-spin response and collective excitations in Weyl semimetals
Sayandip Ghosh, Carsten Timm
Weyl semimetals are characterized by unconventional electromagnetic response. We present analytical expressions for all components of the frequency- and wave-vector-dependent charg…
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…
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…
Electronic structure, spin excitations, and orbital ordering in a three-orbital model for iron pnictides
Sayandip Ghosh, Avinash Singh
A three-orbital itinerant-electron model involving d_{xz}, d_{yz} and d_{xy} Fe 3d orbitals is proposed for iron pnictides towards understanding the (π,0) ordered magnetism and mag…
The role of orbital order in the stabilization of the ordered magnetic state in a minimal two-band model for iron pnictides
Sayandip Ghosh, Avinash Singh
Spin wave excitations and stability of the () ordered magnetic state are investigated in a minimal two-band itinerant-electron model for iron pnictides. Presence of hopping an…
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…