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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

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Integrable Mott insulators driven by a finite electric field.

Marcin Mierzejewski¹, Janez Bonča, Peter Prelovšek

¹Institute of Physics, University of Silesia, 40-007 Katowice, Poland.

Physical Review Letters

|October 27, 2011

Summary

Researchers developed a method to extract steady nonequilibrium current in driven isolated systems. This method revealed vanishingly small dc conductivity in one-dimensional Mott insulators, consistent with equilibrium predictions.

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Area of Science:

Condensed matter physics
Quantum mechanics
Statistical mechanics

Background:

Driven isolated systems present challenges in analyzing steady states.
Understanding nonequilibrium transport properties is crucial for quantum systems.
Mott insulators exhibit strong electron-electron interactions.

Purpose of the Study:

To develop a robust method for extracting steady nonequilibrium current.
To investigate the dc conductivity of a one-dimensional Mott insulator at high temperatures.
To compare nonequilibrium results with equilibrium predictions.

Main Methods:

Development of a novel method for calculating steady nonequilibrium current.
Application of the method to a one-dimensional Mott insulator model.
Analysis of the system's response under driven nonequilibrium conditions.

Main Results:

The developed method successfully extracts steady nonequilibrium current.
A vanishingly small dc conductivity was observed in the linear-response regime for the Mott insulator.
The results align with equilibrium calculations of dc conductivity under perturbation.

Conclusions:

The new method provides a reliable way to study transport in driven quantum systems.
Integrability in quantum systems can lead to suppressed dc conductivity.
Nonequilibrium phenomena in these systems can be understood through comparisons with equilibrium physics.