573 citations · 2.1k across the 30 of their papers we have counts for
25 papers · 1 filter
Time reversal symmetry broken quantum spin hall effect in pseudospin-1 Dirac-Rashba system
Puspita Parui, Bheema Lingam Chittari
The Quantum spin Hall (QSH) phase is conventionally understood to be protected by time-reversal symmetry (TRS). Here, we theoretically investigated the fate of the QSH phase in a p…
Commensurate moiré superlattices in anisotropically strained twisted bilayer graphene
Ayan Mondal, Cristina Joseph, Bheema Lingam Chittari
We investigate how anisotropic strain reorganizes commensurate moiré superlattices and electronic structure in twisted bilayer graphene (TBG) across a finite range of reference twi…
Layer-Dependent Orbital Magnetization in Graphene-Haldane Heterostructures
Sovan Ghosh, Bheema Lingam Chittari
Rhombohedral multilayer graphene (RMG) proximity-coupled to a Haldane substrate provides a platform to investigate the interplay between band topology, layer number, and electric-f…
Tunable Interfacial Thermal Conductance in Graphene/Germanene van der Waals Heterostructure using an Optimized Interlayer Potential
Sapta Sindhu Paul Chowdhury, Sourav Thapliyal, Bheema Lingam Chittari +1
Accurately modeling interfacial thermal transport in van der Waals heterostructures is challenging due to the limited availability of interlayer interaction potentials. We develop…
Magneto transport of pressure induced flatbands in large angle twisted bilayer graphene
Ayan Mondal, Priyanka Sinha, Bheema Lingam Chittari
Twisted bilayer graphene (TBG) exhibits flat electronic bands at the so-called magic angle (), leading to strong electron correlations and emergent quantum phases s…
Gate and Carriers tunable Valley Imbalance in Topological Proximitized Rhombohedral Trilayer Graphene
Sovan Ghosh, Bheema Lingam Chittari
We investigated the electronic structure, Fermi surface topology and the emergence of valley imbalance in rhombohedral trilayer graphene (RTG) induced by the topological proximity…
Valley-polarized Quantum Anomalous Hall and Topological Metal Phase in Rashba induced pseudospin-1 lattice
Puspita Parui, Bheema Lingam Chittari
We study the topological properties of Rashba spin-orbit coupling and exchange coupling induced pseudospin- system Dice lattice under the influence of a staggered electric poten…
Strain induced tunable band gap and optical properties of graphene on hexagonal boron nitride
Priyanka Sinha, Prasanta K. Panigrahi, Bheemalingam Chittari
In this study, we highlight the potential of strain engineering in graphene/hBN (hexagonal Boron nitride) 2D heterostructures, enabling their use as wide-range light absorbers with…
Magnetotransport properties of a twisted bilayer graphene in the presence of external electric and magnetic field
Priyanka Sinha, Ayan Mondal, Simão Meneses João +1
We extensively investigate the electronic and transport properties of a twisted bilayer graphene when subjected to both an external perpendicular electric field and a magnetic fiel…
Orbital Hall Conductivity in a Graphene/Haldane and Haldane/Haldane Bilayers
Sovan Ghosh, Bheema Lingam Chittari
We investigate the orbital Hall conductivity in bilayer graphene (G/G) by modifying one or both the layers as Haldane type ( : Graphene/Haldane and $\rm \tilde G/…
Topological flat bands in rhombohedral tetralayer and multilayer graphene on hexagonal boron nitride moire superlattices
Youngju Park, Yeonju Kim, Bheema Lingam Chittari +1
We show that rhombohedral four-layer graphene (4LG) nearly aligned with a hexagonal boron nitride (hBN) substrate often develops nearly flat isolated low energy bands with non-zero…
Nearly flat bands in twisted triple bilayer graphene
Jiseon Shin, Bheema Lingam Chittari, Yunsu Jang +2
We investigate the electronic structure of alternating-twist triple Bernal-stacked bilayer graphene (t3BG) as a function of interlayer coupling , twist angle , interlayer pot…
Stacking and gate tunable topological flat bands, gaps and anisotropic strip patterns in twisted trilayer graphene
Jiseon Shin, Bheema Lingam Chittari, Jeil Jung
Trilayer graphene with a twisted middle layer has recently emerged as a new platform exhibiting correlated phases and superconductivity near its magic angle. A detailed characteriz…
Topological phases in N-layer ABC-graphene boron-nitride moire superlattices
David Andres Galeano Gonzalez, Bheema Lingam Chittari, Youngju Park +2
Rhombohedral trilayer graphene on hexagonal boron nitride (TLG/BN) hosts gate-tunable, valley-contrasting, nearly flat topological bands that can trigger spontaneous quantu…
Electron-hole asymmetry and band gaps of commensurate double moire patterns in twisted bilayer graphene on hexagonal boron nitride
Jiseon Shin, Youngju Park, Bheema Lingam Chittari +1
Spontaneous orbital magnetism observed in twisted bilayer graphene (tBG) on nearly aligned hexagonal boron nitride (BN) substrate builds on top of the electronic structure resultin…
Gate tunable topological flat bands in twisted monolayer-bilayer graphene
Youngju Park, Bheema Lingam Chittari, Jeil Jung
We investigate the band structure of twisted monolayer-bilayer graphene (tMBG), or twisted graphene on bilayer graphene (tGBG), as a function of twist angles and perpendicular elec…
Magnetoelectric Response of Antiferromagnetic Van der Waals Bilayers
Chao Lei, Bheema Lingam Chittari, Kentaro Nomura +3
We predict that antiferromagnetic bilayers formed from van der Waals (vdW) materials, like bilayer CrI, have a strong magnetoelectric response that can be detected by measuring…
Flatbands in twisted double bilayer graphene
Narasimha Raju Chebrolu, Bheema Lingam Chittari, Jeil Jung
Flatbands with extremely narrow bandwidths on the order of a few mili-electron volts can appear in twisted multilayer graphene systems for appropriate system parameters. Here we in…
Accurate Gap Determination in Monolayer and Bilayer Graphene/h-BN Moire Superlattices
Hakseong Kim, Nicolas Leconte, Bheema L. Chittari +5
High mobility single and few-layer graphene sheets are in many ways attractive as nanoelectronic circuit hosts but lack energy gaps, which are essential to the operation of field-e…
Pressure Induced Compression of Flatbands in Twisted Bilayer Graphene
Bheema Lingam Chittari, Nicolas Leconte, Srivani Javvaji +1
We investigate the bandwidth compression due to out of plane pressure of the moire flatbands near charge neutrality in twisted bilayer graphene for a continuous range of small rota…
Gate-Tunable Topological Flat Bands in Trilayer Graphene-Boron Nitride Moiré Superlattices
Bheema Lingam Chittari, Guorui Chen, Yuanbo Zhang +2
We investigate the electronic structure of the flat bands induced by moiré superlattices and electric fields in nearly aligned ABC trilayer graphene-boron nitride interfaces where…
Evidence of Gate-Tunable Mott Insulator in Trilayer Graphene-Boron Nitride Moiré Superlattice
Guorui Chen, Lili Jiang, Shuang Wu +9
Mott insulator plays a central role in strongly correlated physics, where the repulsive Coulomb interaction dominates over the electron kinetic energy and leads to insulating state…
Carrier and strain tunable intrinsic magnetism in two-dimensional MAX transition metal chalcogenides
Bheema Lingam Chittari, Dongkyu Lee, Allan H. MacDonald +2
We present a density functional theory study of the carrier-density and strain dependence of magnetic order in two-dimensional (2D) MAX (M= V, Cr, Mn, Fe, Co, Ni; A= Si, Ge, Sn…
Dynamic band structure tuning of graphene moiré superlattices with pressure
Matthew Yankowitz, Jeil Jung, Evan Laksono +7
Heterostructures of atomically-thin materials have attracted significant interest owing to their ability to host novel electronic properties fundamentally distinct from their const…