Controlling Spin Interference in Single Radical Molecules.

Controlling Spin Interference in Single Radical Molecules.
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DOI:
10.1021/acs.nanolett.2c05068
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发表时间:
2023-05-10
期刊:
影响因子:
10.8
通讯作者:
Sadeghi, Hatef
Sadeghi, Hatef
中科院分区:
材料科学1区
文献类型:
--
作者:
Chelli, Yahia;Sandhu, Serena;Daaoub, Abdalghani H. S.;Sangtarash, Sara;Sadeghi, Hatef

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Quantum interference (QI) dominates the electronic properties of single molecules even at room temperature and can lead to a large change in their electrical conductance. To take advantage of this for nanoelectronic applications, a mechanism to electronically control QI in single molecules needs to be developed. In this paper, we demonstrate that controlling the quantum interference of each spin in a stable open-shell organic radical with a large π-system is possible by changing the spin state of the radical. We show that the counterintuitive constructive spin interference in a meta-connected radical changes to destructive interference by changing the spin state of the radical from a doublet to a singlet. This results in a significant change in the room temperature electrical conductance by several orders of magnitude, opening up new possibilities for spin interference based molecular switches for energy storage and conversion applications.
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