Prof. Tuğrul Hakioğlu and his international collaborators from several different universities have predicted topological charge density wave formation in monolayer 1H-NbSe2 which is known to be a layered energy material. The research results of their earlier work have been published in American Chemical Society’s Nano (ACS-Nano) journal among the highest impact journals in the field of quantum/physical chemistry, quantum materials science and nanotechnology.

A second paper is being considered in the same journal reporting the effect of the CDW formation on the vibrational and structural phase transitions generalizing the well-known phenomena of Kohn instability to multiphonon bands. Interested readers can examine these works in

Wei-Chi Chiu, Sougata Mardanya, Robert Markiewicz, Jouko Nieminen, Bahadur Singh, Tugrul Hakioglu, Amit Agarwal, Tay-Rong Chang, Hsin Lin, and Arun Bansil, Strain-Induced Charge Density Waves with Emergent Topological States in Monolayer NbSe2, ACS Nano 19, 18108-18116 (2025)

and

Susy Exists, Sougata Mardanya, Robert Markiewicz, Tugrul Hakioglu, Jouko Nieminen, Ville J. Harkonen, Arun Bansil and Sugata Chowdhury, Giant Kohn anomaly and chiral phonons in the charge density wave phase of 1H-NbSe2 (to be published in ACS Nano).

https://arxiv.org/abs/2501.04821