Ashok Chatterjee
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View article: Transport through a correlated polar side-coupled quantum dot transistor in the presence of a magnetic field and dissipation
Transport through a correlated polar side-coupled quantum dot transistor in the presence of a magnetic field and dissipation Open
Non-equilibrium magneto-transport properties of a quantum dot dimer transistor are studied in the presence of electron–electron and electron–phonon interactions and the interaction of the dimer phonons with the substrate phonon bath that g…
View article: Rashba effect on finite temperature magnetotransport in a dissipative quantum dot transistor with electronic and polaronic interactions
Rashba effect on finite temperature magnetotransport in a dissipative quantum dot transistor with electronic and polaronic interactions Open
The Rashba spin–orbit coupling induced quantum transport through a quantum dot embedded in a two-arm quantum loop of a quantum dot transistor is studied at finite temperature in the presence of electron–phonon and Hubbard interactions, an …
View article: Persistent current in a mesoscopic Holstein-Hubbard ring with Dresselhaus interaction
Persistent current in a mesoscopic Holstein-Hubbard ring with Dresselhaus interaction Open
The effect of electron-phonon coupling, onsite repulsive Coulomb interaction and temperature on the persistent current in a quantum ring is studied in the presence of Dresselhaus spin-orbit interaction. The quantum ring threaded by the Aha…
View article: Spin-Hall conductivity and Hall angle in a two-dimensional system with impurities in the presence of spin–orbit interactions
Spin-Hall conductivity and Hall angle in a two-dimensional system with impurities in the presence of spin–orbit interactions Open
We investigate the spin-torque-dependent Spin Hall phenomenon in a two-dimensional tight-binding system in the presence of Rashba and Dresselhaus spin–orbit interactions and random static impurities. We employ the Matsubara Green function …
View article: Interplay of temperature and magnetic field on nonequilibrium transport in a correlated polar single molecular transistor with dissipation
Interplay of temperature and magnetic field on nonequilibrium transport in a correlated polar single molecular transistor with dissipation Open
Quantum magneto-transport in a dissipative single molecular transistor is investigated at finite temperature in the presence of electron correlation and electron-phonon interaction within the framework of the Anderson-Holstein-Caldeira-Leg…
View article: Effect of the hole concentration on the polaronic mobility for the strongly interacting electrons
Effect of the hole concentration on the polaronic mobility for the strongly interacting electrons Open
The effective hopping of the polaron has been studied for different hole concentrations. Holstein-Hubbard model is used for the half-filled and less than half-filled cases. A series of canonical transformations are imposed on the generic H…
View article: Quantum transport in a single molecular transistor at finite temperature
Quantum transport in a single molecular transistor at finite temperature Open
We study quantum transport in a single molecular transistor in which the central region consists of a single-level quantum dot and is connected to two metallic leads that act as a source and a drain respectively. The quantum dot is conside…
View article: Quantum Transport in A Single Molecular Transistor at Finite Temperature
Quantum Transport in A Single Molecular Transistor at Finite Temperature Open
We study quantum transport in a single molecular transistor in which the central region consists of a single-level quantum dot and is connected to two metallic leads that act as a source and a drain respectively. The quantum dot is conside…
View article: An intervening metallic phase at the CDW–SDW transition region in the one-dimensional Holstein-Hubbard model at half filling: a semi-exact solution
An intervening metallic phase at the CDW–SDW transition region in the one-dimensional Holstein-Hubbard model at half filling: a semi-exact solution Open
The one-dimensional Holstein–Hubbard model is analyzed at half filling at the CDW-SDW transition region by using a series of unitary transformations. The phonon degrees of freedom are eliminated by averaging the transformed Hamiltonian wit…
View article: Transport properties of a single-molecular transistor at finite temperature
Transport properties of a single-molecular transistor at finite temperature Open
Quantum transport in a single molecular transistor device is studied at finite temperature in the presence of electron-electron and electron-phonon interactions and dissipation using the Anderson-Holstein-Caldeira-Leggett model. The dissip…
View article: Spin Hall Conductance In a Two-Dimensional Tight-Binding Model In The Presence Of Rashba Spin-Orbit Interaction And Random Impurities
Spin Hall Conductance In a Two-Dimensional Tight-Binding Model In The Presence Of Rashba Spin-Orbit Interaction And Random Impurities Open
The spin-Hall conductance in a two-dimensional tight-binding model is studied in the presence of Rashba spin-orbit interaction and random impurities. The conventional definition of spin current falls through for a system with Rashba spin-o…
View article: The effect of Rashba spin-orbit interaction on persistent current in a chain of two Holstein-Hubbard rings
The effect of Rashba spin-orbit interaction on persistent current in a chain of two Holstein-Hubbard rings Open
We study the persistent current in a chain of two coupled quantum rings threaded by an Aharonov-Bohm flux in the presence of electron-phonon and Rashba spin-orbit interactions. In the framework of the Holstein-Hubbard model, the equations …
View article: Persistent current in a chain of two Holstein-Hubbard rings in the presence of Rashba spin-orbit interaction
Persistent current in a chain of two Holstein-Hubbard rings in the presence of Rashba spin-orbit interaction Open
The persistent current in a chain of two quantum rings threaded by an Aharonov-Bohm flux is studied in the presence of electron-phonon interactions and Rashba spin-orbit coupling.The chain is modeled by the Holstein-Hubbard-Rashba Hamilton…
View article: Magnetic field effect on the energy levels of an exciton in a GaAs quantum dot: Application for excitonic lasers
Magnetic field effect on the energy levels of an exciton in a GaAs quantum dot: Application for excitonic lasers Open
The problem of an exciton trapped in a Gaussian quantum dot (QD) of GaAs is studied in both two and three dimensions in the presence of an external magnetic field using the Ritz variational method, the 1/ N expansion method and the shifted…
View article: Constraints on particle acceleration in SS433/W50 from MAGIC and H.E.S.S. observations
Constraints on particle acceleration in SS433/W50 from MAGIC and H.E.S.S. observations Open
Context. The large jet kinetic power and non-thermal processes occurring in the microquasar SS 433 make this source a good candidate for a very high-energy (VHE) gamma-ray emitter. Gamma-ray fluxes above the sensitivity limits of current C…
View article: MAGIC observations of the microquasar V404 Cygni during the 2015 outburst
MAGIC observations of the microquasar V404 Cygni during the 2015 outburst Open
The microquasar V404 Cygni underwent a series of outbursts in 2015, June 15–31, during which its flux in hard X-rays (20–40 keV) reached about 40 times the Crab nebula flux. Because of the exceptional interest of the flaring activity from …
View article: MAGIC detection of very high energy γ-ray emission from the low-luminosity blazar 1ES 1741+196
MAGIC detection of very high energy γ-ray emission from the low-luminosity blazar 1ES 1741+196 Open
We present the first detection of the nearby (z = 0.084) low-luminosity BL Lac object 1ES 1741+196 in the very high energy (E > 100 GeV) band. This object lies in a triplet of interacting galaxies. Early predictions had suggested 1ES 1741+…
View article: Observations of Sagittarius A* during the pericenter passage of the G2 object with MAGIC
Observations of Sagittarius A* during the pericenter passage of the G2 object with MAGIC Open
Context. We present the results of a multi-year monitoring campaign of the Galactic Center (GC) with the MAGIC telescopes. These observations were primarily motivated by reports that a putative gas cloud (G2) would be passing in close prox…
View article: Persistent current in a correlated quantum ring with electron-phonon interaction in the presence of Rashba interaction and Aharonov-Bohm flux
Persistent current in a correlated quantum ring with electron-phonon interaction in the presence of Rashba interaction and Aharonov-Bohm flux Open
Persistent current in a correlated quantum ring threaded by an Aharonov-Bohm flux is studied in the presence of electron-phonon interactions and Rashba spin-orbit coupling. The quantum ring is modeled by the Holstein-Hubbard-Rashba Hamilto…