D. Roy

collaborators

4 papers

cond-mat.str-el2026

Emergence of a hidden-order phase well below the charge density wave transition in a topological Weyl semimetal (TaSe $_{4}$ ) $_{2}$ 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…

cond-mat.str-el2025

Signatures of emergent surface states across a displacive topological phase transition in Bi $_{4}$ I $_{4}$

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.…

cond-mat.str-el2023

Exceptionally Slow, Long Range, and Non-Gaussian Critical Fluctuations Dominate the Charge Density Wave Transition

Sk Kalimuddin, Sudipta Chatterjee, Arnab Bera +7

$(T a S e_{4})_{2} I$ is a well-studied quasi-one-dimensional compound long-known to have a charge-density wave (CDW) transition around 263 K. We argue that the critical fluctuations of th…

cond-mat.str-el2023

Raman signatures of lattice dynamics across inversion symmetry breaking phase transition in quasi-1D compound, (TaSe $_{4}$ ) $_{3}$ I

Arnab Bera, Partha Sarathi Rana, Suman Kalyan Pradhan +9

Structural phase transition can occur due to complex mechanisms other than simple dynamical instability, especially when the parent and daughter structure is of low dimension. This…

Emergence of a hidden-order phase well below the charge density wave transition in a topological Weyl semimetal (TaSe4​)2​I

Signatures of emergent surface states across a displacive topological phase transition in Bi4​I4​

Exceptionally Slow, Long Range, and Non-Gaussian Critical Fluctuations Dominate the Charge Density Wave Transition

Raman signatures of lattice dynamics across inversion symmetry breaking phase transition in quasi-1D compound, (TaSe4​)3​I

Emergence of a hidden-order phase well below the charge density wave transition in a topological Weyl semimetal (TaSe $_{4}$ ) $_{2}$ I

Signatures of emergent surface states across a displacive topological phase transition in Bi $_{4}$ I $_{4}$

Raman signatures of lattice dynamics across inversion symmetry breaking phase transition in quasi-1D compound, (TaSe $_{4}$ ) $_{3}$ I