Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Madhuparna Karmakar"'
Publikováno v:
Physical Review Research, Vol 4, Iss 4, p 043159 (2022)
The breached-pair state wherein superconductivity coexists with magnetic polarization is known to exist as a ground state of an imbalanced Fermi system only under very fine-tuned conditions. Here, we show that an s-wave superconductor that is well de
Externí odkaz:
https://doaj.org/article/05520df7c6714823b1705dc0bda63233
Autor:
Madhuparna Karmakar, R. Ganesh
Publikováno v:
Physical Review Research, Vol 2, Iss 2, p 023304 (2020)
Competition between superconductivity and charge order is a recurring theme in contemporary condensed matter physics. This is quintessentially captured in the attractive Hubbard model, a simple theoretical model where the competition can be directly
Externí odkaz:
https://doaj.org/article/4113963553c54e828ac3178e17892eed
Autor:
Nyayabanta Swain, Madhuparna Karmakar
Publikováno v:
Physical Review Research, Vol 2, Iss 2, p 023136 (2020)
We report the numerical investigation of strain-induced superconductor-insulator quantum phase transition on a Lieb lattice. Based on a nonperturbative Monte Carlo technique, which retains the spatial fluctuations of the superconducting pairing field
Externí odkaz:
https://doaj.org/article/58d7c0ba1c714a709373c65c0e84481c
Autor:
Madhuparna Karmakar
Publikováno v:
Advances in Condensed Matter Physics, Vol 2011 (2011)
The electrostatic potential and the associated charge distribution in the vortices of high-𝑇𝑐 superconductors involving mixed symmetry state of the order parameters have been studied. The work is carried out in the framework of an extended Ginz
Externí odkaz:
https://doaj.org/article/5be51a6f29c84fbb94acd5f263cabaec
Publikováno v:
Physical Review B. 106
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 Hund's coupled to the electrons, driving double exchange ferromagnetis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee15dde463a8e63e5eab736bcba45e43
https://doi.org/10.1103/physrevb.106.245114
https://doi.org/10.1103/physrevb.106.245114
Autor:
R. Ganesh, Madhuparna Karmakar
Chiral superconductors are expected to carry a spontaneous, chiral and perpetual current along the sample edge. However, despite the availability of several candidate materials, such a current has not been observed in experiments. In this article, we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::039952c0c071eb08be1fa16e20443f96
Autor:
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 this paper, we present the first nonperturbative numerical investigation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abf7fb43213a701d2fc4f325b3b5e118
Autor:
Madhuparna Karmakar, Nyayabanta Swain
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 show that in two dimensions an s-wave superconductor undergoes transiti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0de55c9fa333387b82e5b4199218dafd
http://arxiv.org/abs/1912.04915
http://arxiv.org/abs/1912.04915
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 to overlap, giving rise to long ranged textures. We show that spin orb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::334810d133be6f2d712675dddbd0f7f8
Autor:
Madhuparna Karmakar
Publikováno v:
Journal of Physics: Condensed Matter. 32:405604
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 $d$-wave superconductor a stable ground state phase viz. quantum br
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79d681719ad6e212d5bccb940759aaf9
https://doi.org/10.1088/1361-648x/ab926a
https://doi.org/10.1088/1361-648x/ab926a