108 citations · 1k across the 76 of their papers we have counts for
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Universal magnetotunnel conductance at a Weyl semimetal-layered Chern insulator junction
Nirnoy Basak, Sumathi Rao, Faruk Abdulla
We investigate electronic transport across a junction between a Weyl semimetal (WSM) and a layered Chern insulator (LCI) in the presence of a magnetic field perpendicular to the in…
Magneto tunnel conductance across twisted Weyl semimetal junctions
Nirnoy Basak, Sumathi Rao, Faruk Abdulla
We investigate magnetotransport across an interface between two Weyl semimetals (finite in both directions) whose Weyl nodes project onto two different surfaces which are twisted w…
Can Majorana zero modes in quantum Hall edges survive edge reconstruction?
Kishore Iyer, Amulya Ratnakar, Sumathi Rao +1
Parafermion zero modes can be trapped in the domain walls of quantum Hall edges proximitized by superconductors and ferromagnets. The fractional quantum Hall side strip ar…
Quantum spin Hall insulator in proximity with a superconductor: Transition to the Fulde-Ferrell-Larkin-Ovchinnikov state driven by a Zeeman field
Suman Jyoti De, Udit Khanna, Sumathi Rao +1
We investigate the effects of introducing a boost (a Zeeman field parallel to the spin quantization axis) at the proximitized helical edge of a two-dimensional (2D) quantum spin Ha…
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…
Spontaneous fractional Josephson current from parafermions
Kishore Iyer, Amulya Ratnakar, Aabir Mukhopadyaya +2
We study a parafermion Josephson junction (JJ) comprising a pair of counter-propagating edge modes of two quantum Hall (QH) systems, proximitized by an s-wave superconductor. We sh…
Thermoelectric properties of inversion symmetry broken Weyl semimetal-Weyl superconductor hybrid junctions
Ruchi Saxena, Nirnoy Basak, Pritam Chatterjee +2
We theoretically investigate the thermoelectric properties (electronic contribution) of a hybrid structure comprising of an inversion symmetry broken Weyl semimetal (WSM) and intri…
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…
Chiral detection of Majorana bound states at the edge of a quantum spin Hall insulator
Vivekananda Adak, Aabir Mukhopadhyay, Suman Jyoti De +3
A hybrid setup consisting of a superconductivity-proximitized quantum spin Hall (QSH) insulator and a quantum anomalous Hall (QAH) insulator is proposed for chiral injection of ele…
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…
Fermi arc reconstruction at the interface of twisted Weyl semimetals
Faruk Abdulla, Sumathi Rao, Ganpathy Murthy
Three-dimensional Weyl semimetals have pairs of topologically protected Weyl nodes, whose projections onto the surface Brillouin zone are the end points of zero energy surface stat…
Emergence of spin-active channels at a quantum Hall interface
Amartya Saha, Suman Jyoti De, Sumathi Rao +2
We study the ground state of a system with an interface between and in the quantum Hall regime. Far from the interface, for a range of interaction strengths, the …
Chiral Luttinger liquids in graphene tuned by irradiation
Sourav Biswas, Tridev Mishra, Sumathi Rao +1
We show that chiral co-propagating Luttinger liquids can be created and tuned by shining high frequency, circularly polarized light, normal to the layers, with different polarizati…
Curvature function renormalisation, topological phase transitions and multicriticality
Faruk Abdulla, Priyanka Mohan, Sumathi Rao
A recently proposed curvature renormalization group scheme for topological phase transitions defines a generic `curvature function' as a function of the parameters of the theory an…
Magnetic Flux Periodicity in Second Order Topological Superconductors
Suman Jyoti De, Udit Khanna, Sumathi Rao
The magnetic flux periodicity of is a well known manifestation of Cooper pairing in typical s-wave superconductors. In this paper we theoretically show that the flu…
Quantum charge pumping through Majorana bound states
Krashna Mohan Tripathi, Sumathi Rao, Sourin Das
We study adiabatic charge pumping through a Majorana bound state tunnel coupled to multiple normal leads. We show that for most of the parameters such a pump does not lead to any n…
Interplay of Floquet Lifshitz transitions and topological transitions in bilayer Dirac materials
Priyanka Mohan, Sumathi Rao
We show how transitions between different Lifshitz phases in bilayer Dirac materials with and without spin-orbit coupling can be studied by driving the system. The periodic driving…
Bulk-edge correspondence and new topological phases in periodically driven spin-orbit coupled materials in the low frequency limit
Ruchi Saxena, Sumathi Rao, Arijit Kundu
We study the topological phase transitions induced in spin-orbit coupled materials with buckling like silicene, germanene, stanene, etc, by circularly polarised light, beyond the h…
Fabry-Perot interferometry in Weyl semi-metals
Dibya Kanti Mukherjee, Sumathi Rao, Sourin Das
We show that the electrical transport across a minimal model for a time-reversal symmetry(TRS) breaking Weyl semi-metal (WSM) involving two Weyl nodes can be interpreted as an inte…
Spin Mode-Switching at the Edge of a Quantum Hall System
Udit Khanna, Ganpathy Murthy, Sumathi Rao +1
Quantum Hall states can be characterized by their chiral edge modes. Upon softening the edge potential, the edge has long been known to undergo spontaneous reconstruction driven by…
Transport through Andreev bound states in a Weyl semimetal quantum dot
Dibya Kanti Mukherjee, Sumathi Rao, Arijit Kundu
We study transport through a Weyl semimetal quantum dot sandwiched between an -wave superconductor and a normal lead. The conductance peaks at regular intervals and exhibits dou…
- transitions in a Josephson junction of irradiated Weyl semimetal
Udit Khanna, Sumathi Rao, Arijit Kundu
We propose a setup for the experimental realization of unexpected and anisotropic - transitions of the Josephson current, in a junction whose link is made of irradiated Weyl…
Introduction to abelian and non-abelian anyons
Sumathi Rao
In this set of lectures, we will start with a brief pedagogical introduction to abelian anyons and their properties. This will essentially cover the background material with an int…
Weyl semi-metals : a short review
Sumathi Rao
We begin this review with an introduction and a discussion of Weyl fermions as emergent particles in condensed matter systems, and explain how high energy phenomena like the chiral…