Tuning and sensing spin interactions in Co-porphyrin/Au with N H3 and N O2 binding

Min Hui Chang, Yun Hee Chang, Na Young Kim, Howon Kim, Soon Hyeong Lee, Mahn Soo Choi, Yong Hyun Kim, Se Jong Kahng

Research output: Contribution to journalArticle

Abstract

Controlling spin interactions in magnetic-molecules/metal is essential for spintronic applications. Recent studies showed that using small molecule coordination, one could switch off the spin interactions between magnetic-molecules and metal substrates. However, this control should not be limited to the two-state switching. The strength of spin interaction can be reduced, but not "off" by the proper selection of small molecules. To demonstrate this, we considered two contrasting systems, NH3 and NO2 coordinated to Co-porphyrin/Au(111). In our scanning tunneling microscopy and spectroscopy (STM and STS), Kondo resonance was preserved with weakened spin coupling after NH3 coordination. However, it disappeared after NO2 coordination, implying "off" spin coupling. These observations are explained with our density functional theory calculation results. This study shows that small molecule coordination to magnetic-molecules/metal is a powerful way to control spin interactions at the single-molecule level.

Original languageEnglish
Article number245406
JournalPhysical Review B
Volume100
Issue number24
DOIs
Publication statusPublished - 2019 Dec 6

Fingerprint

Porphyrins
porphyrins
Tuning
tuning
Molecules
molecules
interactions
Metals
metals
Magnetoelectronics
Scanning tunneling microscopy
Density functional theory
scanning tunneling microscopy
Switches
Spectroscopy
density functional theory
Substrates
spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Tuning and sensing spin interactions in Co-porphyrin/Au with N H3 and N O2 binding. / Chang, Min Hui; Chang, Yun Hee; Kim, Na Young; Kim, Howon; Lee, Soon Hyeong; Choi, Mahn Soo; Kim, Yong Hyun; Kahng, Se Jong.

In: Physical Review B, Vol. 100, No. 24, 245406, 06.12.2019.

Research output: Contribution to journalArticle

Chang, MH, Chang, YH, Kim, NY, Kim, H, Lee, SH, Choi, MS, Kim, YH & Kahng, SJ 2019, 'Tuning and sensing spin interactions in Co-porphyrin/Au with N H3 and N O2 binding', Physical Review B, vol. 100, no. 24, 245406. https://doi.org/10.1103/PhysRevB.100.245406
Chang, Min Hui ; Chang, Yun Hee ; Kim, Na Young ; Kim, Howon ; Lee, Soon Hyeong ; Choi, Mahn Soo ; Kim, Yong Hyun ; Kahng, Se Jong. / Tuning and sensing spin interactions in Co-porphyrin/Au with N H3 and N O2 binding. In: Physical Review B. 2019 ; Vol. 100, No. 24.
@article{71bf6220e895471fbfc77113fe2bfe1e,
title = "Tuning and sensing spin interactions in Co-porphyrin/Au with N H3 and N O2 binding",
abstract = "Controlling spin interactions in magnetic-molecules/metal is essential for spintronic applications. Recent studies showed that using small molecule coordination, one could switch off the spin interactions between magnetic-molecules and metal substrates. However, this control should not be limited to the two-state switching. The strength of spin interaction can be reduced, but not {"}off{"} by the proper selection of small molecules. To demonstrate this, we considered two contrasting systems, NH3 and NO2 coordinated to Co-porphyrin/Au(111). In our scanning tunneling microscopy and spectroscopy (STM and STS), Kondo resonance was preserved with weakened spin coupling after NH3 coordination. However, it disappeared after NO2 coordination, implying {"}off{"} spin coupling. These observations are explained with our density functional theory calculation results. This study shows that small molecule coordination to magnetic-molecules/metal is a powerful way to control spin interactions at the single-molecule level.",
author = "Chang, {Min Hui} and Chang, {Yun Hee} and Kim, {Na Young} and Howon Kim and Lee, {Soon Hyeong} and Choi, {Mahn Soo} and Kim, {Yong Hyun} and Kahng, {Se Jong}",
year = "2019",
month = "12",
day = "6",
doi = "10.1103/PhysRevB.100.245406",
language = "English",
volume = "100",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Institute of Physics Publising LLC",
number = "24",

}

TY - JOUR

T1 - Tuning and sensing spin interactions in Co-porphyrin/Au with N H3 and N O2 binding

AU - Chang, Min Hui

AU - Chang, Yun Hee

AU - Kim, Na Young

AU - Kim, Howon

AU - Lee, Soon Hyeong

AU - Choi, Mahn Soo

AU - Kim, Yong Hyun

AU - Kahng, Se Jong

PY - 2019/12/6

Y1 - 2019/12/6

N2 - Controlling spin interactions in magnetic-molecules/metal is essential for spintronic applications. Recent studies showed that using small molecule coordination, one could switch off the spin interactions between magnetic-molecules and metal substrates. However, this control should not be limited to the two-state switching. The strength of spin interaction can be reduced, but not "off" by the proper selection of small molecules. To demonstrate this, we considered two contrasting systems, NH3 and NO2 coordinated to Co-porphyrin/Au(111). In our scanning tunneling microscopy and spectroscopy (STM and STS), Kondo resonance was preserved with weakened spin coupling after NH3 coordination. However, it disappeared after NO2 coordination, implying "off" spin coupling. These observations are explained with our density functional theory calculation results. This study shows that small molecule coordination to magnetic-molecules/metal is a powerful way to control spin interactions at the single-molecule level.

AB - Controlling spin interactions in magnetic-molecules/metal is essential for spintronic applications. Recent studies showed that using small molecule coordination, one could switch off the spin interactions between magnetic-molecules and metal substrates. However, this control should not be limited to the two-state switching. The strength of spin interaction can be reduced, but not "off" by the proper selection of small molecules. To demonstrate this, we considered two contrasting systems, NH3 and NO2 coordinated to Co-porphyrin/Au(111). In our scanning tunneling microscopy and spectroscopy (STM and STS), Kondo resonance was preserved with weakened spin coupling after NH3 coordination. However, it disappeared after NO2 coordination, implying "off" spin coupling. These observations are explained with our density functional theory calculation results. This study shows that small molecule coordination to magnetic-molecules/metal is a powerful way to control spin interactions at the single-molecule level.

UR - http://www.scopus.com/inward/record.url?scp=85076752738&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85076752738&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.100.245406

DO - 10.1103/PhysRevB.100.245406

M3 - Article

AN - SCOPUS:85076752738

VL - 100

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 24

M1 - 245406

ER -