Publications

Displaying 26 - 34 of 34

Communication: Master equations for electron transport: The limits of the Markovian limit

October 19, 2017

Author(s)

Justin E. Elenewski, Daniel S. Gruss, Michael P. Zwolak

Master equations are an increasingly popular framework for the simulation of (time--dependent) electronic transport in nanoscale devices. Most of these approaches take the the Markovian limit for relaxation of charge carriers and thus are phenomenological

Communication: Relaxation-limited electronic currents in extended reservoir simulations

October 13, 2017

Author(s)

Daniel S. Gruss, Alexander Y. Smolyanitsky, Michael P. Zwolak

Open system approaches are gaining traction in the simulation of charge transport in nanoscale and molecular electronic devices. In particular, "extended reservoir" simulations, where explicit reservoir degrees of freedom are present, allow for the

Ionic selectivity and filtration from fragmented dehydration in multilayer graphene nanopores

July 25, 2017

Author(s)

Subin Sahu, Michael P. Zwolak

Selective ion transport is a hallmark of biological ion channel behavior but is a major challenge to engineer into artificial membranes. Here, we demonstrate, with all-atom molecular dynamics, that bare graphene nanopores yield measurable ion selectivity

Dehydration as a Universal Mechanism for Ion Selectivity in Graphene and Other Atomically Thin Pores

July 5, 2017

Author(s)

Subin Sahu, Massimiliano Di Ventra, Michael P. Zwolak

Ion channels play a critical role in regulating cell behavior and in electrical signaling. In these settings, polar and charged functional groups -- as well as protein response -- give rise to ion selective transport, allowing the channels to perform

Enabling photoemission electron microscopy in liquids via graphene-capped microchannel arrays

February 8, 2017

Author(s)

Hongxuan Guo, Evgheni Strelcov, Alexander Yulaev, Jian Wang, Narayana Appathurai, Stephen Urquhart, John Vinson, Subin Sahu, Michael P. Zwolak, Andrei Kolmakov

Photoelectron emission microscopy (PEEM) is a powerful tool to spectroscopically access dynamic surface processes at the nanoscale but is traditionally limited to ultra-high or moderate vacuum conditions. Here, we develop a novel graphene-capped

Thermal transport in dimerized harmonic lattices: Exact solution, crossover behavior, and extended reservoirs

January 23, 2017

Author(s)

Chih-Chun Chien, Said Kouachi, Kirill Velizhanin, Yonatan Dubi, Michael P. Zwolak

We present a method for calculating analytically the thermal conductance of a classical harmonic lattice with both alternating masses and nearest-neighbor couplings when placed between individual Langevin reservoirs at different temperatures. The technique

Measurement-induced decoherence and information in double-slit interference

July 20, 2016

Author(s)

Joshua Kincaid, Kyle McLelland, Michael P. Zwolak

The double slit experiment provides the classic example of both interference and the effect of observation in quantum physics. When particles are sent individually through a pair of slits, a wave-like interference pattern develops; no such interference is

Landauer's formula with finite-time relaxation: Kramers' crossover in electronic transport

April 20, 2016

Author(s)

Daniel S. Gruss, Kirill Velizhanin, Michael P. Zwolak

Landauer's formula relates the conductance of a region of interest to its transmission probability. It is the standard theoretical tool to examine ballistic transport in nano- and meso-scale junctions and devices. This view of transport as transmission

Crossover behavior of the thermal conductance and Kramers' transition rate theory

December 4, 2015

Author(s)

Kirill Velizhanin, Subin Sahu, Chih-Chun Chien, Yonatan Dubi, Michael P. Zwolak

Kramers' theory frames chemical reaction rates in solution as reactants overcoming a barrier in the presence of friction and noise. For weak coupling to the solution, the reaction rate is limited by the rate at which the solution can restore equilibrium

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