Welcome to Homepage of Amar Bharti
I am PhD candidate in IIT Bombay currently exploring the strong laser field induced phenomenon in a class of topological materials, especially Weyl semimetals.
The anomalous Hall effect can be induced and probed on femtosecond timescale. We show that femtosecond laser pulse give rise to anomalous Hall effect in time-reversal broken Weyl semimetal. The high harmonic spectroscopy can be used to measure the strength of anomalous Hall current. This provides an all-optical probe of anomalous Hall effect in Weyl semimetals. Alongwith this, this pave way to tailor light.
We answer the question "how the intense laser changes the optical response of Weyl semimetals?". The anomalous Hall response shows significant deviation from linear response theory calculations. Overall, larger topological charges lead to the increase in cutoff and yield of harmonics.
We challenge the widely accepted notion that Weyl fermions are truly massless. The key question addressed in the study is whether circularly polarized light with opposite helicity can generate non-mirror-symmetric excitations in inversion-symmetric Weyl semimetals even near the Weyl nodes. Our work demonstrates that the answer to this question is affirmative.
Amar Bharti and Gopal Dixit, Phys. Rev. B 108, L161113, – Published 26 October 2023
Amar Bharti, Misha Ivanov, and Gopal Dixit, Phys. Rev. B 108, L020305 – Published 25 July 2023
Amar Bharti and Gopal Dixit, Phys. Rev. B 107, 224308 – Published 15 June 2023
Amar Bharti, M. S. Mrudul, and Gopal Dixit, Phys. Rev. B 105, 155140 – Published 21 April 2022