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Inelastic Transport and Low-Bias Rectification in a Single-Molecule Diode

Inelastic Transport and Low-Bias Rectification in a Single-Molecule Diode
Hihath, JoshuaBruot, ChristopherNakamura, HisaoAsai, YoshihiroDiez-Perez, IsmaelLee, YounguYu, LupingTao, Nongjian
DGIST Authors
Lee, Youngu
Issued Date
Article Type
Anti-SymmetricBehavioral ResearchChemistryDistillationElastic TransmissionsElasticityElectric ConductivityElectric RectifiersElectrical EquipmentElectrical Equipment and SuppliesElectrodeElectrodesElectronElectron-Phonon InteractionsElectron TunnelingElectronsEquipment DesignFirst-Principles CalculationIETSInelastic Electron TunnelingInelastic Electron Tunneling SpectroscopyLow BiasLow TemperaturesMolecular-Scale DevicesMolecular ElectronicsMoleculesPhononPhononsPyrimidinePyrimidine DerivativePyrimidinesRectification BehaviorReverse BiasScanning Tunneling MicroscopySingle-MoleculeSingle-Molecule ConductanceSingle-Molecule JunctionsSingle Molecule DiodesSpectroscopySTM-Break JunctionSulfhydryl CompoundsTemperatureThiol DerivativeTransport BehaviorTransport MechanismTransport PathwaysZero Bias
Designing, controlling, and understanding rectification behavior in molecular-scale devices has been a goal of the molecular electronics community for many years. Here we study the transport behavior of a single molecule diode, and its nonrectifying, symmetric counterpart at low temperatures, and at both low and high biases to help elucidate the electron-phonon interactions and transport mechanisms in the rectifying system. We find that the onset of current rectification occurs at low biases, indicating a significant change in the elastic transport pathway. However, the peaks in the inelastic electron tunneling (IET) spectrum are antisymmetric about zero bias and show no significant changes in energy or intensity in the forward or reverse bias directions, indicating that despite the change in the elastic transmission probability there is little impact on the inelastic pathway. These results agree with first principles calculations performed to evaluate the IETS, which also allow us to identify which modes are active in the single molecule junction. © 2011 American Chemical Society.
American Chemical Society
Related Researcher
  • 이윤구 Lee, Youngu 에너지공학과
  • Research Interests OTF Solar cell; OLED; Printed Electronics; 유기박막형 태양전지
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Department of Energy Science and Engineering Organic & Printed Electronics Laboratory(OPEL) 1. Journal Articles


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