23 citations · 134 across the 28 of their papers we have counts for
29 papers
Lifshitz transition and magnetic superconductivity in flat band systems
Sudeshna Pal, K. B. Yogendra, Madhuparna Karmakar +1
A Lifshitz transition is a class of non-symmetry-breaking transitions typically associated with metallic systems wherein the Fermi surface changes its connectivity as the chemical…
Finite temperature pair density wave superconductivity in -wave altermagnets
Amrutha N Madhusuthanan, Madhuparna Karmakar
We demonstrate that altermagnetism provides a field-free mechanism for stabilizing finite-momentum superconductivity in two dimensions. Using a non-perturbative static path approxi…
Thermal stability of pair density wave in a -wave altermagnetic superconductor
Amrutha N Madhusuthanan, Madhuparna Karmakar
We study finite-momentum superconductivity in a two-dimensional -wave altermagnetic superconductor using a non-perturbative Monte Carlo approach beyond mean-field theory. We sho…
Metal-insulator transition and thermal scales in -wave altermagnet
Santhosh Kannan, Jainam Savla, Madhuparna Karmakar
We present the first finite-temperature study of a strongly correlated -wave altermagnet across the Mott insulator-metal transition using a non-perturbative numerical approach.…
Non Fermi liquid signatures across strain engineered metal-insulator transition in line-graph lattices
Shashikant Singh Kunwar, Madhuparna Karmakar
Controlling the properties and thus the functionalities of correlated electron systems via externally tunable perturbations has always remained a cherished goal in quantum condense…
Straintronics across Lieb-Kagome interconversion and variable transport scaling exponents
Shashikant Singh Kunwar, Madhuparna Karmakar
We propose a novel protocol of low-temperature, strain-tuned re-entrant metal-insulator transition and crossover between strongly correlated line-graph lattices (Lieb and Kagome).…
Correlated electrons in flat bands: Concepts and Developments
Madhuparna Karmakar
When the electronic dispersion in a material is independent of momentum, it gives rise to strongly correlated flat bands, with the single particle energy, quenched. Though the noti…
Many-body quantum thermal machines in a Lieb-kagome Hubbard model
Saikat Sur, Pritam Chattopadhyay, Madhuparna Karmakar +1
Quantum many-body systems serve as a suitable working medium for realizing quantum thermal machines (QTMs) by offering distinct advantages such as cooperative many-body effects, an…
Kagome Hubbard model away from the strong coupling limit: Flat band localization and non Fermi liquid signatures
Shashikant Singh Kunwar, Madhuparna Karmakar
Taking cue from the recent experimental realization of metallic phases in Kagome materials we report the low temperature signatures and thermal scales of Kagome metals and insulato…
Fermi-Bose crossover using engineered disorder potential
Madhuparna Karmakar, Rajesh Narayanan
We present the first instance of a disorder tuned Fermi-Bose crossover that could be realized in superconducting systems. More specifically, harnessing a non perturbative numerical…
Temperature tuned Fermi surface topology and segmentation in non-centrosymmetric superconductors
Madhuparna Karmakar
We report the first comprehensive microscopic description of the thermal fluctuations tuned Fermi surface characteristics in a non-centrosymmetric superconductor, in presence of an…
Transport and spectroscopic signatures of a disorder-stabilized metal in two-dimensional frustrated Mott insulators
Madhuparna Karmakar, Nyayabanta Swain
Frustrated Mott insulators such as transition metal dichalcogenides present an ideal platform for the experimental realization of externally tuned insulator-metal transition. In th…
Disorder-induced currents as signatures of chiral superconductivity
Madhuparna Karmakar, R. Ganesh
Chiral superconductors are expected to carry a spontaneous, chiral and perpetual current along the sample edge. However, despite the availability of several candidate materials, su…
Imbalanced Fermi systems and exotic superconducting phases
Madhuparna Karmakar
Quantum many body phases, in competition or coexistence has always been a fascinating area of research in condensed matter physics. One of the most widely investigated scenario of…
Pauli limited d-wave superconductors: Quantum breached pair phase and thermal transitions
Madhuparna Karmakar
We report a quantum phase transition in Pauli limited -wave superconductors and give the mean field estimates of the associated quantum critical point. For a population imbalanc…
The attractive Hubbard model as an system of competing phases: supersolid order and its thermal melting
Madhuparna Karmakar, R. Ganesh
Competition between superconductivity and charge order is a recurring theme in contemporary condensed matter physics. This is quintessentially captured in the attractive Hubbard mo…
Strain induced superconductor-insulator transition on Lieb lattice
Nyayabanta Swain, Madhuparna Karmakar
We report the numerical investigation of strain induced superconductor-insulator quantum phase transition on a Lieb lattice. Based on a non perturbative Monte Carlo technique, we s…
Skyrmion-like textures in superconductors with competing order
V. Saran, Madhuparna Karmakar, R. Ganesh
Vortex cores in a superconductor can develop structure and manifest competing orders. In strong magnetic fields, the inter-vortex distance can become short enough for vortex cores…
Thermally induced gaplessness and Fermi arcs in a "s-wave" magnetic superconductor
Madhuparna Karmakar, Pinaki Majumdar
An electron system with pre-existing local moments and an effective electron-electron attraction can exhibit simultaneous magnetic and superconducting order. Increasing the magneti…
Vortex core ordering in Abrikosov lattices
Madhuparna Karmakar, R. Ganesh
Vortex lattices, arising from repulsive inter-vortex interactions, are a canonical example of emergent phenomena. Recent studies on the cuprates have drawn attention to the appeara…
Thermal transitions, pseudogap behavior and BCS-BEC crossover in Fermi-Fermi mixtures
Madhuparna Karmakar
We study the mass imbalanced Fermi-Fermi mixture within the framework of a two-dimensional lattice fermion model. Based on the thermodynamic and species dependent quasiparticle beh…
Impurity induced phase competition and supersolidity
Madhuparna Karmakar, R. Ganesh
Several material families show competition between superconductivity and other orders. When such competition is driven by doping, it invariably involves spatial inhomogeneities whi…
Vortex core order and field-driven phase coexistence in the attractive Hubbard model
Madhuparna Karmakar, Gautam I. Menon, R. Ganesh
Superconductivity occurs in the proximity of other competing orders in a wide variety of materials. Such competing phases may reveal themselves when superconductivity is locally su…
Spin-orbital liquids and insulator-metal transitions on the pyrochlore lattice
Nyayabanta Swain, Madhuparna Karmakar, Pinaki Majumdar
The two orbital Hubbard model, with the electrons additionally coupled to a complex magnetic background, arises in the pyrochlore molybdates. The background involves local moments…