Spinterface Formation at α-Sexithiophene/Ferromagnetic Conducting Oxide

Ilaria Bergenti; Alberto Riminucci; Patrizio Graziosi; Christiano Albonetti; Mattia Benini; Stefano Toffanin; Sergio Lopez; Rajib Rakshit; Manju Singh; Phillip Bentley; Iuliia Melchakova; Pavel Avramov; Alek Dediu; Andrew Pratt

doi:10.1021/acs.jpcc.0c09713

Spinterface Formation at α-Sexithiophene/Ferromagnetic Conducting Oxide

Ilaria Bergenti, Alberto Riminucci, Patrizio Graziosi, Christiano Albonetti, Mattia Benini, Stefano Toffanin, Sergio Lopez, Rajib Rakshit, Manju Singh, Phillip Bentley, Iuliia Melchakova, Pavel Avramov, Alek Dediu, Andrew Pratt

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

The inorganic/molecular spinterface is an ideal platform for generating extraordinary spin effects. Understanding and controlling these spin-related effects is mandatory for the exploitation of such interfaces in devices. For this purpose we have investigated the adsorption of α-sexithiophene (α-6T) on La0.7Sr0.3MnO3 (LSMO) as one of the prototypical material combinations used in organic spintronic devices. Atomic force microscopy (AFM), confocal photoluminescence, X-ray and utraviolet photoelectron spectroscopy, and metastable de-excitation spectroscopy unraveled the structure and the electronic configuration of 6T for various surface coverages. This data set allowed the determination of the characteristic features of occupied states: the band diagram and the work function. Finally, density functional theory enabled us to establish that the spin polarization in 6T molecular orbitals critically depends on the termination layer of LSMO, showing a substantial effect on the MnO-terminated one only. We believe that this research provides important hints for a comprehensive understanding of spinterface effects in general and offers key suggestions for the optimization of 6T/LSMO-based spin devices through the engineering of LSMO termination layer.

Original language	English
Pages (from-to)	6073-6081
Number of pages	9
Journal	Journal of Physical Chemistry C
Volume	125
Issue number	11
DOIs	https://doi.org/10.1021/acs.jpcc.0c09713
Publication status	Published - 11 Mar 2021

Bibliographical note

© 2021 American Chemical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

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10.1021/acs.jpcc.0c09713

Spinterface formation at α-sexithiophene/ferromagnetic 2 conducting oxide
© 2021 American Chemical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details
Accepted author manuscript, 3.85 MB

Cite this

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title = "Spinterface Formation at α-Sexithiophene/Ferromagnetic Conducting Oxide",

abstract = "The inorganic/molecular spinterface is an ideal platform for generating extraordinary spin effects. Understanding and controlling these spin-related effects is mandatory for the exploitation of such interfaces in devices. For this purpose we have investigated the adsorption of α-sexithiophene (α-6T) on La0.7Sr0.3MnO3 (LSMO) as one of the prototypical material combinations used in organic spintronic devices. Atomic force microscopy (AFM), confocal photoluminescence, X-ray and utraviolet photoelectron spectroscopy, and metastable de-excitation spectroscopy unraveled the structure and the electronic configuration of 6T for various surface coverages. This data set allowed the determination of the characteristic features of occupied states: the band diagram and the work function. Finally, density functional theory enabled us to establish that the spin polarization in 6T molecular orbitals critically depends on the termination layer of LSMO, showing a substantial effect on the MnO-terminated one only. We believe that this research provides important hints for a comprehensive understanding of spinterface effects in general and offers key suggestions for the optimization of 6T/LSMO-based spin devices through the engineering of LSMO termination layer.",

author = "Ilaria Bergenti and Alberto Riminucci and Patrizio Graziosi and Christiano Albonetti and Mattia Benini and Stefano Toffanin and Sergio Lopez and Rajib Rakshit and Manju Singh and Phillip Bentley and Iuliia Melchakova and Pavel Avramov and Alek Dediu and Andrew Pratt",

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AU - Bergenti, Ilaria

AU - Riminucci, Alberto

AU - Graziosi, Patrizio

AU - Albonetti, Christiano

AU - Benini, Mattia

AU - Toffanin, Stefano

AU - Lopez, Sergio

AU - Rakshit, Rajib

AU - Singh, Manju

AU - Bentley, Phillip

AU - Melchakova, Iuliia

AU - Avramov, Pavel

AU - Dediu, Alek

AU - Pratt, Andrew

N1 - © 2021 American Chemical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

PY - 2021/3/11

Y1 - 2021/3/11

N2 - The inorganic/molecular spinterface is an ideal platform for generating extraordinary spin effects. Understanding and controlling these spin-related effects is mandatory for the exploitation of such interfaces in devices. For this purpose we have investigated the adsorption of α-sexithiophene (α-6T) on La0.7Sr0.3MnO3 (LSMO) as one of the prototypical material combinations used in organic spintronic devices. Atomic force microscopy (AFM), confocal photoluminescence, X-ray and utraviolet photoelectron spectroscopy, and metastable de-excitation spectroscopy unraveled the structure and the electronic configuration of 6T for various surface coverages. This data set allowed the determination of the characteristic features of occupied states: the band diagram and the work function. Finally, density functional theory enabled us to establish that the spin polarization in 6T molecular orbitals critically depends on the termination layer of LSMO, showing a substantial effect on the MnO-terminated one only. We believe that this research provides important hints for a comprehensive understanding of spinterface effects in general and offers key suggestions for the optimization of 6T/LSMO-based spin devices through the engineering of LSMO termination layer.

AB - The inorganic/molecular spinterface is an ideal platform for generating extraordinary spin effects. Understanding and controlling these spin-related effects is mandatory for the exploitation of such interfaces in devices. For this purpose we have investigated the adsorption of α-sexithiophene (α-6T) on La0.7Sr0.3MnO3 (LSMO) as one of the prototypical material combinations used in organic spintronic devices. Atomic force microscopy (AFM), confocal photoluminescence, X-ray and utraviolet photoelectron spectroscopy, and metastable de-excitation spectroscopy unraveled the structure and the electronic configuration of 6T for various surface coverages. This data set allowed the determination of the characteristic features of occupied states: the band diagram and the work function. Finally, density functional theory enabled us to establish that the spin polarization in 6T molecular orbitals critically depends on the termination layer of LSMO, showing a substantial effect on the MnO-terminated one only. We believe that this research provides important hints for a comprehensive understanding of spinterface effects in general and offers key suggestions for the optimization of 6T/LSMO-based spin devices through the engineering of LSMO termination layer.

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