Research Papers in Physics and Astronomy

 

Date of this Version

2020

Citation

J. Phys. Chem. Lett. 2020, 11, 19, 8231–8237

https://doi.org/10.1021/acs.jpclett.0c02209

Comments

Copyright © 2020 American Chemical Society

Abstract

Voltage-controlled nonvolatile isothermal spin state switching of a [Fe{H2B(pz)2}2(bipy)] (pz=tris(pyrazol-1-1y)-borohydride, bipy=2,2’-bipyridine) film, more than 40 to 50 molecular layers thick, is possible when it is adsorbed onto a molecular ferroelectric substrate. Accompanying this high spin and low spin state switching, at room temperature, we observe a remarkable change in conductance, thereby allowing not only non-volatile voltage control of the spin state (“write”), but also current sensing of the molecular spin state (“read”). Monte Carlo Ising model simulations of the high spin state occupancy, extracted from x-ray absorption spectroscopy, indicate that the energy difference between the low spin to high spin state is modified by 110 meV. Transport measurements demonstrate that three terminal voltagecontrolled devices can be realized using this system.

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