27 citations · 153 across the 15 of their papers we have counts for
15 papers
Experimentally Motivated Order of Length Scales Affect Shot Noise
Sourav Manna, Ankur Das
Shot noise at a conductance plateau in a quantum point contact (QPC) can be explained by considering equilibrations at the quantum Hall edges. The indication from recent experiment…
Shot noise as a diagnostic in the fractional quantum Hall edge zoo
Sourav Manna, Ankur Das, Yuval Gefen +1
The filling is the simplest paradigmatic example of a fractional quantum Hall state, which contains counter-propagating edge modes. These modes can be either in the unequi…
Multiple Mechanisms for Emerging Conductance Plateaus in Fractional Quantum Hall States
Sourav Manna, Ankur Das, Yuval Gefen +1
Two-terminal conductance quantization in the context of quantum Hall (QH) physics is intimately related to the current carried by a discrete number of chiral edge modes. Upon pinch…
Full Classification of Transport on an Equilibrated 5/2 Edge via Shot Noise
Sourav Manna, Ankur Das, Moshe Goldstein +1
The nature of the bulk topological order of the 5/2 non-Abelian fractional quantum Hall state and the steady-state of its edge are long-studied questions. The most promising non-Ab…
Global phase diagram of charge neutral graphene in the quantum Hall regime for generic interactions
Suman Jyoti De, Ankur Das, Sumathi Rao +2
Monolayer graphene at charge neutrality in a quantizing magnetic field is a quantum Hall ferromagnet. Due to the spin and valley (near) degeneracies, there is a plethora of possibl…
Punctured-Chern topological invariants for semi-metallic bandstructures
Ankur Das, Eyal Cornfeld, Sumiran Pujari
Topological insulator-based methods underpin the topological classification of gapped bands, including those surrounding semi-metallic nodal defects. However, multiple bands with g…
Does shot noise always provide the quasiparticle charge?
Sourav Biswas, Rajarshi Bhattacharyya, Hemanta Kumar Kundu +5
The fractional charge of quasiparticles is a fundamental feature of quantum Hall effect (QHE) States. The charge has long been measured via shot-noise at moderate temperatures (…
Coexistence of Canted Antiferromagnetism and Bond-order in Graphene
Ankur Das, Ribhu K. Kaul, Ganpathy Murthy
Motivated by experimental studies of graphene in the quantum Hall regime, we revisit the phase diagram of a single sheet of graphene at charge neutrality. Because of spin and valle…
Time-reversal-broken Weyl semimetal in the Hofstadter regime
Faruk Abdulla, Ankur Das, Sumathi Rao +1
We study the phase diagram for a lattice model of a time-reversal-broken three-dimensional Weyl semimetal (WSM) in an orbital magnetic field with a flux of per unit cell…
Layer Coherent Phase in Double Layer graphene at
Amartya Saha, Ankur Das
In the recent advancement in graphene heterostructures, it is possible to create a double layer tunnel decoupled graphene system that has a strong interlayer electronic interaction…
Dc Electrical Current Generated by Upstream Neutral Modes
Ankur Das, Sumathi Rao, Yuval Gefen +1
Quantum Hall phases are gapped in the bulk but support chiral edge modes, both charged and neutral. Here we consider a circuit where the path from the source of electric current to…
On the topological character of three-dimensional Nexus triple point degeneracies
Ankur Das, Sumiran Pujari
Recently a generic class of three-dimensional band structures was identified that host two-fold line degeneracies meeting at three-fold or triple point degeneracies, which resist t…
Stability of zero energy Dirac touchings in the honeycomb Hofstadter problem
Ankur Das, Ribhu K. Kaul, Ganpathy Murthy
We study the band structure of electrons hopping on a honeycomb lattice with 1/q (q integer) flux quanta through each elementary hexagon. In the nearest neighbor hopping model the…
SU(3) fermions in a three-band Graphene-like model
Ankur Das, Sumiran Pujari
Two-dimensional Graphene is fascinating because of its unique electronic properties. From a fundamental perspective, one among them is the geometric phase structure near the Dirac…
Phase Transition In Gauge Theory With Many Fundamental Bosons
Ankur Das
Here we study the Renormalization group flow of gauge theory with -fundamental bosons in dimension by calculating the beta functions. We found a new sta…