12 citations · 65 across the 21 of their papers we have counts for
22 papers
Entropy-Driven Altermagnetism from Thermal Magnons
Tanaya Halder, Ashis K. Nandy, Anamitra Mukherjee
We identify a route to altermagnetism driven by entropy upon heating and demonstrate it in a minimal square-lattice antiferromagnet. An exchange modulation is entropically favored…
Spin-reorientation as a switch for electronic topology in van der Waals ferromagnets
Satyabrata Bera, Sudipta Chatterjee, Suman Kalyan Pradhan +5
The interplay between spin reorientation and topological electronic structure in two-dimensional (2D) van der Waals (vdW) ferromagnets is central to understanding how magnetic anis…
Unusual magnetic and charge transport properties in In-Substituted Half-Metallic Kagome Ferromagnet Co3Sn2S2
Karan Singh, Subhadip Pradhan, K. Mukherjee +3
The kagome ferromagnet Co3Sn2S2 has been studied extensively for its unusual topology of electronic bands, origin of ferromagnetism and strong coupling between magnetism and charge…
Emergence of a hidden-order phase well below the charge density wave transition in a topological Weyl semimetal (TaSe)I
Sk Kalimuddin, Sudipta Chatterjee, Arnab Bera +7
The emergence of a charge density wave (CDW) in a Weyl semimetal -- a correlated topological phase, is exceptionally rare in condensed matter systems. In this context, the quasi-on…
The interplay of magnetic order with the electronic scattering and crystal-field effects in a metallic ferromagnet
Payel Shee, Tanaya Halder, Chia-Jung Yang +9
The interplay between magnetic order, charge dynamics, and crystal field excitations underpins the emergent ground states of rare-earth intermetallics. Using time-domain terahertz…
Paradoxical Topological Soliton Lattice in Anisotropic Frustrated Chiral Magnets
Sayan Banik, Nikolai S. Kiselev, Ashis K. Nandy
Two-dimensional chiral magnets are known to host a variety of skyrmions, characterized by an integer topological charge. However, these systems typically favor uniform lattices as…
Skyrmion-Antiskyrmion Lattice: A Net-Zero Topological Phase in Low-Symmetry Frustrated Chiral Magnets
Sayan Banik, Ashis K. Nandy
We report the discovery of a thermodynamically stable skyrmion-antiskyrmion lattice in two-dimensional heterostructures, a novel state exhibiting a net-zero global topological char…
Field-free superconducting diode effect in two-dimensional Shiba lattices
Sayak Bhowmik, Dibyendu Samanta, Ashis K. Nandy +2
The superconducting diode effect (SDE) refers to non-reciprocal transport, where current flows without resistance in one direction but becomes resistive in the opposite direction,…
Emergent Quasiparticles \& Field-Tuned RIXS Spectra in a Trimerized Spin-1/2 Chain
Subhajyoti Pal, Pradeep Thakur, Ashis Kumar Nandy +1
We investigate spin-flip excitations in the spin-1/2 trimer chain , featuring an antiferromagnetic exchange motif -- with . Using d…
Anomalous Hall and Nernst effect switching via staggered rotation in a kagome antiferromagnetic semimetal
Subhadip Pradhan, Kartik Samanta, Ashis K. Nandy
The intricate interplay between magnetism and the topology of electronic structures provides a rich avenue for tailoring materials with unique and potent anomalous transport proper…
Current-induced spin polarisation in Rashba-Dresselhaus systems under different point groups
Akash Dey, Ashis K. Nandy, Kush Saha
Non-magnetic materials without inversion symmetry typically exhibit strong Rashba spin-orbit coupling (SOC), enabling the well-known Rashba Edelstein effect where an external elect…
Optimizing one dimensional superconducting diodes: Interplay of Rashba spin-orbit coupling and magnetic fields
Sayak Bhowmik, Dibyendu Samanta, Ashis K. Nandy +2
The superconducting diode effect (SDE) refers to the non-reciprocal nature of the critical current (maximum current that a superconductor can withstand before turning into a normal…
Terahertz crystal electric field transitions in a Kondo-lattice antiferromagnet
Payel Shee, Chia-Jung Yang, Shishir Kumar Pandey +5
Hybridization between the localized f-electrons and the delocalized conduction electrons together with the crystal electric field (CEF) play a determinant role in governing the man…
Pressure-Driven Transitions in La2CoTiO6: Antiferromagnetic Insulator to Nonmagnetic Metal via Antiferromagnetic Metal in a Double Perovskite Oxide
Sromona Nandi, Subhadip Pradhan, Ashis K. Nandy +1
In double perovskite oxides (ABBO), magnetism often arises from diluted magnetic lattices, created by combining a perovskite structure with localized 3 magnetic…
Anomalous Hall effect induced by Berry curvature in topological nodal-line van der Waals ferromagnet FeGeTe
Satyabrata Bera, Sudipta Chatterjee, Subhadip Pradhan +5
The exploration of nontrivial transport phenomena associated with the interplay between magnetic order and spin-orbit coupling (SOC), particularly in van der Waals (vdW) systems ha…
Second-order topological superconductor via noncollinear magnetic texture
Pritam Chatterjee, Arnob Kumar Ghosh, Ashis K. Nandy +1
We put forth a theoretical framework for engineering a two-dimensional (2D) second-order topological superconductor (SOTSC) by utilizing a heterostructure: incorporating noncolline…
Topological Superconductivity by Engineering Noncollinear Magnetism in Magnet/ Superconductor Heterostructures: A Realistic Prescription for 2D Kitaev Model
Pritam Chatterjee, Sayan Banik, Sandip Bera +4
We report on a realistic and rather general scheme where noncollinear magnetic textures proximitized with the most common -wave superconductor can appear as the alternative to $…
Higher order exchange driven noncoplanar magnetic state and large anomalous Hall effects in electron doped kagome magnet MnSn
Charanpreet Singh, Sk Jamaluddin, Ashis K. Nandy +3
Owing to the geometrical frustration, MnSn exhibits a 120 in-plane triangular antiferromagnetic (AFM) order with a large anomalous Hall effect (AHE). Here, we presen…
Observation of anisotropic Dirac cones in the topological material Ti2Te2P
Gyanendra Dhakal, Firoza Kabir, Ashis K. Nandy +12
Anisotropic bulk Dirac (or Weyl) cones in three dimensional systems have recently gained intense research interest as they are examples of materials with tilted Dirac (or Weyl) con…
Tailoring phase transition from topological superconductor to trivial superconductor induced by magnetic textures of a spin-chain on a -wave superconductor
Pritam Chatterjee, Saurabh Pradhan, Ashis K. Nandy +1
We theoretically investigate the phase transition from a non-trivial topological -wave superconductor to a trivial -wave like superconducting phase through a gapless phase, d…
Vector Chirality Driven Topological Phase Transition and the Associated Anomalous Hall Conductivity Tuning in a Non-Collinear Antiferromagnet
Subhadip Pradhan, Kartik Samanta, Kush Saha +1
Based on the first-principles electronic structure calculations and subsequent symmetry adapted effective low-energy theory, we show the switching of the vector chir…
Defect Modulated Band Modification in Ion Implanted MgO Crystal: Experimental and Ab Initio Calculations
Sourav Bhakta, Subhadip Pradhan, Ashis K. Nandy +1
Defects creation and annihilation is a fundamental concept in device fabrication. This report studies the optical bandgap modification in MgO by MeV Ni ion irradiation-induced defe…