Anomalous pressure dependence of phonon line widths in metallic pyrochlore iridates (EuBi)IrO: crossover from incoherent to coherent metal

A Thomas, P Telang, D Rout, K Mishra, A Pal… - Pramana, 2023 - Springer
Abstract Pyrochlore iridate (Eu 2 Ir 2 O 7) shows an interesting metallic phase, termed as
incoherent metal, above the metal–insulator transition temperature, with high resistivity and …

Non-fermi liquid behavior and continuously tunable resistivity exponents in the Anderson-Hubbard model at finite temperature

ND Patel, A Mukherjee, N Kaushal, A Moreo… - Physical Review Letters, 2017 - APS
We employ a recently developed computational many-body technique to study for the first
time the half-filled Anderson-Hubbard model at finite temperature and arbitrary correlation U …

Magnetotransport and Fermi surface segmentation in Pauli limited superconductors

M Karmakar - Journal of Physics: Condensed Matter, 2024 - iopscience.iop.org
We report the first theoretical investigation of the spectroscopic, electrical and optical
transport signatures of d-wave Pauli limited superconductors, based on a non perturbative …

Pauli limited d-wave superconductors: quantum breached pair phase and thermal transitions

M Karmakar - Journal of Physics: Condensed Matter, 2020 - iopscience.iop.org
We report a quantum phase transition in Pauli limited d-wave superconductors and give the
mean field estimates of the associated quantum critical point. For a population imbalanced d …

Strong ferromagnetic fluctuations in a doped checkerboard lattice

Y Pan, R Ma, T Ma - Physical Review B, 2023 - APS
Using the determinant quantum Monte Carlo method, we study the magnetic susceptibility in
the parameter space of the on-site interaction U, temperature T, electron filling〈 n〉, and the …

Transport and spectroscopic signatures of a disorder-stabilized metal in two-dimensional frustrated Mott insulators

M Karmakar, N Swain - Physical Review B, 2022 - APS
Frustrated Mott insulators such as transition metal dichalcogenides present an ideal platform
for the experimental realization of externally tuned insulator-metal transition. In this paper …

Kagome Hubbard model away from the strong coupling limit: Flat band localization and non Fermi liquid signatures

SS Kunwar, M Karmakar - arXiv preprint arXiv:2404.05787, 2024 - arxiv.org
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 …

Magnetic order and Mott transition on the checkerboard lattice

N Swain, P Majumdar - Journal of Physics: Condensed Matter, 2017 - iopscience.iop.org
The checkerboard lattice, with alternating'crossed'plaquettes, serves as the two dimensional
analog of the pyrochlore lattice. The corner sharing plaquette structure leads to a hugely …

Spatial behavior in a Mott insulator near the voltage-driven resistive transition

A Dutta, P Majumdar - Physical Review B, 2020 - APS
We develop a real-space theory of the voltage bias driven transition from a Mott insulator to
a correlated metal. Within our Keldysh mean-field approach the problem reduces to a self …

Spin-orbital liquids and insulator-metal transitions on the pyrochlore lattice

N Swain, M Karmakar, P Majumdar - Physical Review B, 2022 - APS
The two orbital Hubbard model, with the electrons additionally coupled to a complex
magnetic background, arises in the pyrochlore molybdates. The background involves local …