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A Landauer Formula for Bioelectronic Applications.

Eszter Papp1, Dávid P Jelenfi2, Máté T Veszeli3

  • 1Department of Physics of Complex Systems, Eötvös Loránd University, H-1117 Budapest, Pázmány Péter sétány 1/A, Hungary. epapp95@gmail.com.

Biomolecules
|October 17, 2019
PubMed
Summary
This summary is machine-generated.

This study explains surprising protein electronic transport findings, like temperature-independent conductance, using a new quantum model. The generalized Landauer formula accounts for tunneling and decoherence, simplifying calculations for protein conductance. Keywords: protein electronics, quantum transport, Landauer formula.

Keywords:
Landauer fromulaconductance of biomoleculesmetallic contacts

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Area of Science:

  • * Molecular electronics and biophysics.
  • * Quantum transport phenomena in biological systems.

Background:

  • * Conventional models predict exponential suppression of electronic conductance with distance and temperature.
  • * Recent experiments reveal counterintuitive protein electronic transport: nearly temperature-independent and distance-independent conductance.
  • * Anomalously high conductance values (0.1–10 nS) have been observed in proteins.

Purpose of the Study:

  • * To develop a theoretical framework explaining the observed "stylized facts" in protein electronic transport.
  • * To generalize the low-temperature Landauer formula to include tunneling and decoherence effects.
  • * To provide a simplified model for calculating protein conductance.

Main Methods:

  • * Generalization of the low-temperature Landauer formula.
  • * Incorporation of quantum tunneling and decoherence effects.
  • * Development of novel approximations for simplified mathematical treatment.

Main Results:

  • * The generalized formula successfully explains temperature-independent and distance-independent conductance in proteins.
  • * The model accounts for anomalously large conductance values observed in experiments.
  • * Calculations are simplified using macroscopic parameters instead of microscopic details.

Conclusions:

  • * The new theoretical approach reconciles experimental findings with quantum transport theory.
  • * The model offers a computationally efficient method for predicting protein transport properties.
  • * It aids in identifying crucial protein structural features relevant to electronic transport.