Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Rajdeep Sensarma"'
Autor:
Ayan Ghosh, Souvik Chakraborty, Unmesh Ghorai, Arup Kumar Paul, K. Watanabe, T. Taniguchi, Rajdeep Sensarma, Anindya Das
Publikováno v:
Communications Physics, Vol 6, Iss 1, Pp 1-9 (2023)
Abstract Recently, magic-angle twisted bilayer graphene (MATBLG) has emerged with various interaction-driven novel quantum phases at the commensurate fillings of the moiré superlattice, while the charge neutrality point (CNP) remains mostly a trivia
Externí odkaz:
https://doaj.org/article/331e4a94c96946fa9dc98cf17399a434
Autor:
Biswajit Datta, Santanu Dey, Abhisek Samanta, Hitesh Agarwal, Abhinandan Borah, Kenji Watanabe, Takashi Taniguchi, Rajdeep Sensarma, Mandar M. Deshmukh
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-7 (2017)
Few-layered graphene offers a powerful platform to investigate electronic interactions beyond the non-interacting electron picture approximation. Here, the authors report the signature of strong electronic interactions and quantum Hall ferromagnetism
Externí odkaz:
https://doaj.org/article/f25b92a597a64e5ab841d374c9ef6bec
Autor:
Kamalika Nath, P C Mahato, Amit D Lad, Moniruzzaman Shaikh, Kamalesh Jana, Deep Sarkar, Rajdeep Sensarma, G Ravindra Kumar, S S Banerjee
Publikováno v:
New Journal of Physics, Vol 23, Iss 8, p 083027 (2021)
Study of the formation and evolution of large scale, ordered structures is an enduring theme in science. Generation, evolution and control of large sized magnetic domains are challenging tasks, given the complex nature of competing interactions in a
Externí odkaz:
https://doaj.org/article/dc0ab22148544acc804730d90430291f
Publikováno v:
Physical Review B. 106
We study the two-particle spectral functions and collective modes of weakly disordered superconductors using a disordered attractive Hubbard model on square lattice. We show that the disorder induced scattering between collective modes leads to a fin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2dd489a72f3e2ddbe465277333a14a56
https://doi.org/10.1103/physrevb.106.064512
https://doi.org/10.1103/physrevb.106.064512
Autor:
Rajdeep Sensarma, Ahana Chakraborty
Publikováno v:
Physical Review Letters. 127
We propose a new field theoretic method for calculating Renyi entropy of a sub-system of many interacting Bosons without using replica methods. This method is applicable to dynamics of both open and closed quantum systems starting from arbitrary init
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::154a91ea8569216bdf2112276dacfd64
https://doi.org/10.1103/physrevlett.127.200603
https://doi.org/10.1103/physrevlett.127.200603
Publikováno v:
Physical Review B. 103
We show that the valley Chern number of the low-energy band in twisted double bilayer graphene can be tuned through two successive topological transitions, where the direct band gap closes, by changing the electric field perpendicular to the plane of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b0cae60992780d7137e02cd1431d35bc
https://doi.org/10.1103/physrevb.103.155149
https://doi.org/10.1103/physrevb.103.155149
Autor:
Md Mursalin Islam, Rajdeep Sensarma
We propose a new method to study non-equilibrium dynamics of scalar fields starting from non-Gaussian initial conditions using Keldysh field theory. We use it to study dynamics of phonons coupled to non-interacting bosonic and fermionic baths, starti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77f69c6af32feb6ebcb8322de506e49f
We investigate the effect of thermal fluctuations on the two-particle spectral function for a disordered $s$-wave superconductor in two dimensions, focusing on the evolution of the collective amplitude and phase modes. We find three main effects of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::108278f140273ddd22af9b427a756300
Publikováno v:
Physical Review B
We study the dynamics of one- and two-dimensional disordered lattice bosons/fermions initialized to a Fock state with 1 particle on a set of lattice sites ($A$) and 0 particles on the rest of the sites ($\overline{A}$). Such states have been consider
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e3d2eb7ae08f3c9f7a7d5d9f91b2797
https://doi.org/10.1103/physrevb.102.224306
https://doi.org/10.1103/physrevb.102.224306
Autor:
Saranyo Moitra, Rajdeep Sensarma
Publikováno v:
Physical Review B. 102
We formulate a new ``Wigner characteristics'' based method to calculate entanglement entropies of subsystems of Fermions using Keldysh field theory. This bypasses the requirements of working with complicated manifolds for calculating R\'{e}nyi entrop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ad1655e4e7820b0ed36f76b02a4803f
https://doi.org/10.1103/physrevb.102.184306
https://doi.org/10.1103/physrevb.102.184306