337 citations · 1.8k across the 28 of their papers we have counts for
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Quantum metric nonlinear Hall effect in a topological antiferromagnetic heterostructure
Anyuan Gao, Yu-Fei Liu, Jian-Xiang Qiu +28
Quantum geometry - the geometry of electron Bloch wavefunctions - is central to modern condensed matter physics. Due to the quantum nature, quantum geometry has two parts, the real…
Axion optical induction of antiferromagnetic order
Jian-Xiang Qiu, Christian Tzschaschel, Junyeong Ahn +25
Using circularly-polarized light to control quantum matter is a highly intriguing topic in physics, chemistry and biology. Previous studies have demonstrated helicity-dependent opt…
Topological Circular Dichroism in Chiral Multifold Semimetals
Junyeong Ahn, Barun Ghosh
Uncovering the physical contents of the nontrivial topology of quantum states is a critical problem in condensed matter physics. Here, we study the topological circular dichroism i…
Switchable large-gap quantum spin Hall state in two-dimensional MSiZ materials class
Rajibul Islam, Rahul Verma, Barun Ghosh +4
Quantum spin Hall (QSH) insulators exhibit spin-polarized conducting edge states that are topologically protected from backscattering and offer unique opportunities for addressing…
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…
KCoS: A new two-dimensional in-plane antiferromagnetic insulator
Anan Bari Sarkar, Barun Ghosh, Bahadur Singh +4
The recent discovery of two-dimensional (2D) magnetic materials has brought magnetism to the flatland. This has opened up exciting opportunities for the exploration of fundamental…
Topological crystalline insulator state with type-II Dirac fermions in transition metal dipnictides
Baokai Wang, Bahadur Singh, Barun Ghosh +8
The interplay between topology and crystalline symmetries in materials can lead to a variety of topological crystalline insulator (TCI) states. Despite significant effort towards t…
Temperature Dependent Electronic Structure in a Higher Order Topological Insulator Candidate EuInAs
Sabin Regmi, Md Mofazzel Hosen, Barun Ghosh +12
The higher order topological insulator (HOTI) has enticed enormous research interests owing to its novelty in supporting gapless states along the hinges of the crystal. Despite sev…
Low-energy type-II Dirac fermions and spin-polarized topological surface states in transition-metal dichalcogenide NiTe
Barun Ghosh, Debashis Mondal, Chia-Nung Kuo +6
Using spin- and angle- resolved photoemission spectroscopy (spin-ARPES) together with calculations, we demonstrate the existence of a type-II Dirac semimetal stat…
Saddle-point von Hove singularity and dual topological insulator state in PtHgSe
Barun Ghosh, Sougata Mardanya, Bahadur Singh +7
Saddle-point van Hove singularities in the topological surface states are interesting because they can provide a new pathway for accessing exotic correlated phenomena in topologica…
Topological Hourglass Dirac Semimetal in the Nonpolar Phase of AgBiO
Bahadur Singh, Barun Ghosh, Chenliang Su +3
Materials with tunable charge and lattice degrees of freedom provide excellent platforms for investigating multiple phases that can be controlled via external stimuli. We show how…
Broadband excitation spectrum of bulk crystals and thin layers of PtTe
Barun Ghosh, Francesca Alessandro, Marilena Zappia +8
We explore the broadband excitation spectrum of bulk PtTe using electron energy loss spectroscopy and density functional theory. In addition to infrared modes related to intrab…
Anisotropic plasmons, excitons and electron energy loss spectroscopy of phosphorene
Barun Ghosh, Piyush Kumar, Anmol Thakur +3
In this article, we explore the anisotropic electron energy loss spectrum (EELS) in monolayer phosphorene based on ab-initio time dependent density functional theory calculations.…
Electric-field tunable Dirac semimetal state in phosphorene thin films
Barun Ghosh, Bahadur Singh, R. Prasad +1
We study the electric-field tunable electronic properties of phosphorene thin films, using the framework of density functional theory. We show that phosphorene thin films offer a v…
Electrical and optical conductivities of hole gas in -doped bulk III-V semiconductors
Alestin Mawrie, Pushpajit Halder, Barun Ghosh +1
We study electrical and optical conductivities of hole gas in -doped bulk III-V semiconductors described by the Luttinger Hamiltonian. We provide exact analytical expressions of…
Electric field induced gap modification in ultrathin blue phosphorous
Barun Ghosh, Suhas Nahas, Somnath Bhowmick +1
We investigate the possibility of band structure engineering in the recently predicted 2D layered form of blue phosphorus via an electric field (E) applied perpendicular to the…