356 citations · 1.1k across the 44 of their papers we have counts for
10 papers · 1 filter
Comment on ``Friedel phases and phases of transmission amplitudes in quantum scattering systems" by T. Taniguchi and M. Buettiker
P. Singha Deo
We take a modified boundary condition at the dead end of a stub to simulate transmission zeroes being replaced by minima and then the discontinuous phase slip (or decrease) at the…
Nature of eigenstates in a mesoscopic ring coupled to a side branch
P. A. Sreeram, P. Singha Deo
We formalize the parity effect of a multichannel ring coupled to a side branch using the tight binding model. We find that the tight binding model gives slightly different result f…
Phase of Aharonov-Bohm oscillations in conductance of mesoscopic systems
P. Singha Deo, A. M. Jayannavar
Motivated by a recent experiment we analyze in detail the phase of Aharonov-Bohm oscillations across a 1D ring with a stub coupled to one of its arms, in the presence of a magnetic…
Aharonov-Bohm effect in the presence of evanescent modes
B. C. Gupta, P. Singha Deo, A. M. Jayannavar
It is known that differential magnetoconductance of a normal metal loop connected to reservoirs by ideal wires is always negative when an electron travels as an evanescent modes in…
Effect of impurity on current magnification property of mesoscopic open rings
T. P. Pareek, P. Singha Deo, A. M. Jayannavar
We have considered an open system consisting of a metallic ring coupled to two electron reservoirs. We have recently shown that in the presence of a transport current, circulating…
Revisiting Thouless conductance formula
P. Singha Deo
It was shown using perturbation theory[1] that Thouless energy Ec for a quantum system scales linearly with the conductance of the system. We derive in an alternate way in 1-D that…
Topological effects on magnitude of persistent current in a ring
P. Singha Deo
We show that defects in 1D rings decrease the conductance (when the ring is opened up) many more times than it decreases the persistent currents. This means that the states in such…
How general is Legett's conjecture for a mesoscopic ring?
P. Singha Deo
It has been shown[19] that in a loop of length u to which a single stub of length v is attached (fig. 1 in ref. 19), the parity effect is completely destroyed when v/u. It was…
CURRENT MAGNIFICATION AND CIRCULATING CURRENTS IN MESOSCOPIC RINGS
A. M. Jayannavar, P. Singha Deo, T. P. Pareek
We show that several novel effects related to persistent currents can arise in open systems, which have no analogue in closed or isolated systems. We have considered a system of a…
Persistent Currents in the Presence of a Transport Current
A. M. Jayannavar, P. Singha Deo
We have considered a system of a metallic ring coupled to two electron reservoirs. We show that in the presence of a transport current, the persistent current can flow in a ring, e…