7 papers
Magnetic anisotropy in the near-stoichiometric van der Waals ferromagnet FeGeTe
Riju Pal, Joyal John Abraham, Satyabrata Bera +5
Quasi-two-dimensional (2D) van der Waals (vdW) ferromagnets such as the series FeGeTe, with a relatively high Curie temperature and robust metallicity, offer an ideal p…
Ultrafast Critical Slowing of Spin Dynamics and Emergent Nonequilibrium Fano Interference in Fe3GeTe2
Anupama Chauhan, Sidhanta Sahu, Satyabrata Bera +5
FeGeTe is a prototypical metallic van der Waals ferromagnet with itinerant magnetism and a highly tunable Curie temperature, yet how electronic excitations couple to spin a…
Uncovering long-lived relaxation channel and exciton-phonon coupling in \textrm{Ta\textsubscript{2}NiSe\textsubscript{5}} via non-degenerate pump-probe spectroscopy
Poulami Ghosh, Anupama Chauhan, Sidhanta Sahu +3
An excitonic insulator represents a quantum phase in which spontaneous condensation of excitons leads to novel many-body phenomena. TaNSi (TNSe), a layered narrow-gap semic…
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…
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…
Signatures of emergent surface states across a displacive topological phase transition in BiI
Deep Singha Roy, Sk Kalimuddin, Subrata Pachhal +13
Topological phase transitions involving crystalline symmetry breaking provide a fertile ground to explore the interplay between symmetry, topology, and emergent quantum phenomena.…