337 citations · 1k across the 27 of their papers we have counts for
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Nonlinear Valley Hall Effect
Kamal Das, Koushik Ghorai, Dimitrie Culcer +1
The valley Hall effect arises from valley contrasting Berry curvature and requires inversion symmetry breaking. Here, we propose a nonlinear mechanism to generate a valley Hall cur…
Room Temperature Ferroelectricity, Ferromagnetism, and Anomalous Hall Effect in Half-metallic Monolayer CrTe
Imran Ahamed, Atasi Chakraborty, Pushpendra Yadav +4
Two-dimensional materials hosting ferroelectricity and ferromagnetism are crucial for low-power and high-speed information processing technologies. However, intrinsic 2D multiferro…
Observation of time-reversal symmetric Hall effect in graphene-WSe2 heterostructures at room temperature
Priya Tiwari, Divya Sahani, Atasi Chakraborty +5
In this letter, we provide experimental evidence of the time-reversal symmetric Hall effect in a mesoscopic system, namely high-mobility graphene/WSe heterostructures. This lin…
Intrinsic nonreciprocal bulk plasmons in noncentrosymmetric magnetic systems
Debasis Dutta, Atasi Chakraborty, Amit Agarwal
Nonreciprocal plasmonics enables one-way light propagation at the nanoscale and it is an essential building block for photonics applications. Here, we explore intrinsic nonreciproc…
Strongly bound excitons in monolayer MoSiZ (Z = pnictogen)
Pushpendra Yadav, Bramhachari Khamari, Bahadur Singh +2
Reduced dielectric screening in two-dimensional materials enables bound excitons, which modifies their optical absorption and optoelectronic response even at room temperature. Here…
Nonlinear anomalous Hall effects probe topological phase-transitions in twisted double bilayer graphene
Atasi Chakraborty, Kamal Das, Subhajit Sinha +3
Nonlinear anomalous Hall effect is the Berry curvature dipole induced second-order Hall voltage or temperature difference in response to a longitudinal electric field or temperatur…
Tunable interband and intraband plasmons in twisted double bilayer graphene
Atasi Chakraborty, Debasis Dutta, Amit Agarwal
Flat bands in twisted moire superlattices support a variety of topological and strongly correlated phenomena along with easily tunable electrical and optical properties. Here, we d…
Nonlinear magnetoconductivity in Weyl and multi-Weyl semimetal in quantizing magnetic field
Sunit Das, Kamal Das, Amit Agarwal
Magnetotransport and magneto-optics experiments offer a very powerful probe for studying the physical properties of materials. Here, we investigate the second-order nonlinear magne…
Berry curvature dipole senses topological transition in a moiré superlattice
Subhajit Sinha, Pratap Chandra Adak, Atasi Chakraborty +8
Topological aspects of electron wavefunction play a crucial role in determining the physical properties of materials. Berry curvature and Chern number are used to define the topolo…
Magnetically tunable Dirac and Weyl fermions in the Zintl materials family
Anan Bari Sarkar, Sougata Mardanya, Shin-Ming Huang +7
Recent classification efforts encompassing crystalline symmetries have revealed rich possibilities for solid-state systems to support a tapestry of exotic topological states. Howev…
Two-dimensional MoSi2N4: An Excellent 2D Semiconductor for Transistors
Keshari Nandan, Barun Ghosh, Amit Agarwal +2
We report the performance of field-effect transistors (FETs), comprised of mono-layer of recently synthesized layered two-dimensional MoSi2N_4 as channel material, using the first…
Tunable spin polarization and electronic structure of bottom-up synthesized MoSiN materials
Rajibul Islam, Barun Ghosh, Carmine Autieri +4
Manipulation of spin-polarized electronic states of two-dimensional (2D) materials under ambient conditions is necessary for developing new quantum devices with small physical dime…
Observation of Dynamic Screening in the Excited Exciton States in Multi-layered MoS
Manobina Karmakar, Sayantan Bhattacharya, Subhrajit Mukherjee +6
Excitonic resonance and binding energies can be altered by controlling the environmental screening of the attractive Coulomb potential. Although this screening response is often as…