97 citations · 276 across the 12 of their papers we have counts for
12 papers
New class of exactly flat topological bands - compact localised states protected by local graph topology
Tamaghna Hazra
Strongly correlated quantum matter is fundamentally defined by the tension between non-commuting quantum operators. Hamiltonians exhibiting macroscopic degeneracies are of general…
Obstructed Cooper pairs in flat band systems -- weakly-coherent superfluids and exact spin liquids
Tamaghna Hazra, Nishchhal Verma, Jörg Schmalian
Superconductivity in a partially filled flat band presents a vexing conceptual hurdle because the absence of a Fermi surface precludes a weak-coupling regime where one can extend i…
Buckyballs directly probe inter-valley coherence in moire heterostructures
Tamaghna Hazra
Moire materials like twisted bilayer graphene have emerged as a rich playground of strongly correlated physics, where the effect of interactions can be drastically enhanced by tuni…
Pair-Kondo effect: a mechanism for time-reversal broken superconductivity in UTe
Tamaghna Hazra, Pavel A. Volkov
An important open puzzle in the superconductivity of UTe is the emergence of time-reversal broken superconductivity from a non-magnetic normal state. Breaking time-reversal sym…
Triplet pairing mechanisms from Hund's-Kondo models: applications to UTe and CeRhAs
Tamaghna Hazra, Piers Coleman
Observing that several U and Ce based candidate triplet superconductors share a common structural motif, with pairs of magnetic atoms separated by an inversion center, we hypothesi…
Optical Spectral Weight, Phase Stiffness and Tc Bounds for Trivial and Topological Flat Band Superconductors
Nishchhal Verma, Tamaghna Hazra, Mohit Randeria
We present exact results that give insight into how interactions lead to transport and superconductivity in a flat band where the electrons have no kinetic energy. We obtain bounds…
Luttinger sum rules and spin fractionalization in the SU(N) Kondo Lattice
Tamaghna Hazra, Piers Coleman
We show how Oshikawa's theorem for the Fermi surface volume of the Kondo lattice can be extended to the SU symmetric case. By extending the theorem, we are able to show that t…
Spectral functions across an Insulator to Superconductor Transition
Tamaghna Hazra, Nandini Trivedi, Mohit Randeria
In a minimal 2-band model with attractive interactions between fermions, we calculate the gap to single and two-particle excitations, the band-dependent spectral functions, the sup…
Band inversion and topology of the bulk electronic structure in FeSeTe
Himanshu Lohani, Tamaghna Hazra, Amit Ribak +5
FeSeTe (FeSeTe) has recently emerged as a promising candidate to host topological superconductivity, with a Dirac surface state and signatures of Majorana bou…
Upper bounds on the superfluid stiffness and superconducting : Applications to twisted-bilayer graphene and ultra-cold Fermi gases
Tamaghna Hazra, Nishchhal Verma, Mohit Randeria
Understanding the material parameters that control the superconducting transition temperature is a problem of fundamental importance. In many novel superconductors, phase flu…
Topological superconductivity in Dirac honeycomb systems
Kyungmin Lee, Tamaghna Hazra, Mohit Randeria +1
We predict two topological superconducting phases in microscopic models arising from the Berry phase associated with the valley degree of freedom in gapped Dirac honeycomb systems.…
Exact solutions of coupled Liénard-type nonlinear systems using factorization technique
Tamaghna Hazra, V. K. Chandrasekar, R. Gladwin Pradeep +1
General solutions of nonlinear ordinary differential equations (ODEs) are in general difficult to find although powerful integrability techniques exist in the literature for this p…