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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Magnetic quantum coherence effect in Ni4 molecular transistors.

Gabriel González¹, Michael N Leuenberger

¹Departamento de Matemáticas y Física, Instituto Tecnológico y de Estudios Superiores de Occidente, Periférico Sur Manuel Gómez Morín 8585 CP 45604, Tlaquepaque, Jal., Mexico.

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|June 12, 2014

Summary

We studied electron transport in Ni4 molecular transistors, revealing how magnetic quantum coherence (MQC) causes unique MQC resonances. These findings are crucial for understanding spin-polarized electron behavior in molecular devices.

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Area of Science:

Quantum Transport
Molecular Electronics
Spintronics

Background:

Electron transport in molecular transistors is influenced by spin.
Zeeman spin splitting and magnetic quantum coherence (MQC) are key phenomena.

Purpose of the Study:

To theoretically investigate electron transport in Ni4 molecular transistors.
To understand the role of Zeeman spin splitting and MQC in electron transport.

Main Methods:

Theoretical study using the Landauer formula.
Analysis of electron transport at zero temperature.
Investigating conductance dependence on bias and magnetic field.

Main Results:

Zeeman interaction in leads creates energy gaps for spin-polarized transport.
MQC induces effective coupling between localized and continuum spin states.
MQC is responsible for observed resonances, termed MQC resonances.

Conclusions:

MQC plays a critical role in enabling spin-polarized electron transport in Ni4 molecular transistors.
The study identifies and explains MQC resonances, offering insights into molecular spintronics.