Organic Radicals As Spin Filters

C. Herrmann; Gemma Clare Solomon; M. A. Ratner

Organic Radicals As Spin Filters

C. Herrmann, Gemma Clare Solomon, M. A. Ratner

Kemisk Institut

128 Citationer (Scopus)

Abstract

"Chemical equation presented" Molecular spintronics has received extensive interest in recent years. Due to their favorable properties such as long spin coherence lengths and an amenability to fine-tuning via chemical substituents, organic materials play a prominent role in this field. Here we discuss how organic radicals may act as spin filters in the coherent tunneling regime and how they may be tuned to filter either majority- or minority-spin electrons by adding electron-donating or -withdrawing substituents. For a set of benzene-based model systems, we identify dips in the spin-resolved transmission, which may be caused by destructive interference, as a desirable feature when aiming for efficient spin filtering. Furthermore, the qualitative predictions made for our model systems are shown to be transferable to larger stable radicals.

Originalsprog	Engelsk
Tidsskrift	Journal of the American Chemical Society
Vol/bind	132
Udgave nummer	11
ISSN	0002-7863
Status	Udgivet - 24 mar. 2010

Citationsformater

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T1 - Organic Radicals As Spin Filters

AU - Herrmann, C.

AU - Solomon, Gemma Clare

AU - Ratner, M. A.

PY - 2010/3/24

Y1 - 2010/3/24

N2 - "Chemical equation presented" Molecular spintronics has received extensive interest in recent years. Due to their favorable properties such as long spin coherence lengths and an amenability to fine-tuning via chemical substituents, organic materials play a prominent role in this field. Here we discuss how organic radicals may act as spin filters in the coherent tunneling regime and how they may be tuned to filter either majority- or minority-spin electrons by adding electron-donating or -withdrawing substituents. For a set of benzene-based model systems, we identify dips in the spin-resolved transmission, which may be caused by destructive interference, as a desirable feature when aiming for efficient spin filtering. Furthermore, the qualitative predictions made for our model systems are shown to be transferable to larger stable radicals.

AB - "Chemical equation presented" Molecular spintronics has received extensive interest in recent years. Due to their favorable properties such as long spin coherence lengths and an amenability to fine-tuning via chemical substituents, organic materials play a prominent role in this field. Here we discuss how organic radicals may act as spin filters in the coherent tunneling regime and how they may be tuned to filter either majority- or minority-spin electrons by adding electron-donating or -withdrawing substituents. For a set of benzene-based model systems, we identify dips in the spin-resolved transmission, which may be caused by destructive interference, as a desirable feature when aiming for efficient spin filtering. Furthermore, the qualitative predictions made for our model systems are shown to be transferable to larger stable radicals.

M3 - Journal article

SN - 0002-7863

VL - 132

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 11

ER -

Organic Radicals As Spin Filters

Abstract

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Citationsformater