We present and experimentally verify a universal theoretical framework for the description of spin-charge interconversion in non-magnetic metal/insulator structures with interfacial spin–orbit coupling (ISOC). Our formulation is based on drift-diffusion equations supplemented with generalized boundary conditions. The latter encode the effects of ISOC and relate the electronic transport in such systems to spin loss and spin-charge interconversion at the interface. We demonstrate that the conversion efficiency depends solely on these interfacial parameters. We apply our formalism to two typical spintronic devices that exploit ISOC: a lateral spin valve and a multilayer Hall bar, for which we calculate the non-local resistance and the spin Hall magnetoresistance, respectively. Finally, we perform measurements on these two devices with a BiOx/Cu interface and verify that transport properties related to the ISOC are quantified by the same set of interfacial parameters.
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5 October 2020
Research Article|
October 06 2020
Quantification of interfacial spin-charge conversion in hybrid devices with a metal/insulator interface
Cristina Sanz-Fernández
;
Cristina Sanz-Fernández
a)
1
Centro de Física de Materiales (CFM-MPC), Centro Mixto CSIC-UPV/EHU
, 20018 Donostia-San Sebastián, Basque Country, Spain
a)Authors to whom correspondence should be addressed: cristina_sanz001@ehu.eus; v.pham@nanogune.eu; ilya.tokatly@ehu.es; f.casanova@nanogune.eu; and fs.bergeret@csic.es
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Van Tuong Pham
;
Van Tuong Pham
a)
2
CIC nanoGUNE
, 20018 Donostia-San Sebastián, Basque Country, Spain
a)Authors to whom correspondence should be addressed: cristina_sanz001@ehu.eus; v.pham@nanogune.eu; ilya.tokatly@ehu.es; f.casanova@nanogune.eu; and fs.bergeret@csic.es
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Edurne Sagasta;
Edurne Sagasta
2
CIC nanoGUNE
, 20018 Donostia-San Sebastián, Basque Country, Spain
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Luis E. Hueso
;
Luis E. Hueso
2
CIC nanoGUNE
, 20018 Donostia-San Sebastián, Basque Country, Spain
3
IKERBASQUE, Basque Foundation for Science
, 48013 Bilbao, Basque Country, Spain
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Ilya V. Tokatly
;
Ilya V. Tokatly
a)
3
IKERBASQUE, Basque Foundation for Science
, 48013 Bilbao, Basque Country, Spain
4
Nano-Bio Spectroscopy Group, Departamento de Física de Materiales, Universidad del País Vasco (UPV/EHU)
, 20018 Donostia-San Sebastián, Basque Country, Spain
5
Donostia International Physics Center (DIPC)
, 20018 Donostia-San Sebastián, Basque Country, Spain
a)Authors to whom correspondence should be addressed: cristina_sanz001@ehu.eus; v.pham@nanogune.eu; ilya.tokatly@ehu.es; f.casanova@nanogune.eu; and fs.bergeret@csic.es
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Fèlix Casanova
;
Fèlix Casanova
a)
2
CIC nanoGUNE
, 20018 Donostia-San Sebastián, Basque Country, Spain
3
IKERBASQUE, Basque Foundation for Science
, 48013 Bilbao, Basque Country, Spain
a)Authors to whom correspondence should be addressed: cristina_sanz001@ehu.eus; v.pham@nanogune.eu; ilya.tokatly@ehu.es; f.casanova@nanogune.eu; and fs.bergeret@csic.es
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F. Sebastián Bergeret
F. Sebastián Bergeret
a)
1
Centro de Física de Materiales (CFM-MPC), Centro Mixto CSIC-UPV/EHU
, 20018 Donostia-San Sebastián, Basque Country, Spain
5
Donostia International Physics Center (DIPC)
, 20018 Donostia-San Sebastián, Basque Country, Spain
a)Authors to whom correspondence should be addressed: cristina_sanz001@ehu.eus; v.pham@nanogune.eu; ilya.tokatly@ehu.es; f.casanova@nanogune.eu; and fs.bergeret@csic.es
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a)Authors to whom correspondence should be addressed: cristina_sanz001@ehu.eus; v.pham@nanogune.eu; ilya.tokatly@ehu.es; f.casanova@nanogune.eu; and fs.bergeret@csic.es
Appl. Phys. Lett. 117, 142405 (2020)
Article history
Received:
August 03 2020
Accepted:
September 11 2020
Citation
Cristina Sanz-Fernández, Van Tuong Pham, Edurne Sagasta, Luis E. Hueso, Ilya V. Tokatly, Fèlix Casanova, F. Sebastián Bergeret; Quantification of interfacial spin-charge conversion in hybrid devices with a metal/insulator interface. Appl. Phys. Lett. 5 October 2020; 117 (14): 142405. https://doi.org/10.1063/5.0023992
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