Tuning the spin Hall effect of Pt from the moderately dirty to the superclean regime

Edurne  Sagasta; Yasumoto Omori; Miren Isasa; Martin Gradhand; Luis E. Hueso; Yasuhiro Niimi; Yoshichika Otani; Fèlix Casanova

doi:10.1103/PhysRevB.94.060412

Tuning the spin Hall effect of Pt from the moderately dirty to the superclean regime

Edurne Sagasta
, Yasumoto Omori
, Miren Isasa
, Martin Gradhand
, Luis E. Hueso
, Yasuhiro Niimi
, Yoshichika Otani
, Fèlix Casanova

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

290 Citations (Scopus)

472 Downloads (Pure)

Abstract

We systematically measure and analyze the spin diffusion length and the spin Hall effect in Pt with a wide range of conductivities using the spin absorption method in lateral spin valve devices. We observe a linear relation between the spin diffusion length and the conductivity, evidencing that the spin relaxation in Pt is governed by the Elliott-Yafet mechanism. We find a single intrinsic spin Hall conductivity (σ^int_SH=1600±150Ω⁻¹cm⁻¹) for Pt in the full range studied which is in good agreement with theory. We have obtained the crossover between the moderately dirty and the superclean scaling regimes of the spin Hall effect by tuning the conductivity. This is equivalent to that obtained for the anomalous Hall effect. Our results explain the spread of the spin Hall angle values in the literature and find a route to maximize this important parameter.

Original language	English
Article number	060412(R)
Number of pages	6
Journal	Physical Review B
Volume	94
DOIs	https://doi.org/10.1103/PhysRevB.94.060412
Publication status	Published - 30 Aug 2016

Bibliographical note

proxy date of acceptance added to output record.

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10.1103/PhysRevB.94.060412

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This is the accepted author manuscript (AAM). The final published version (version of record) is available online via American Physical Society at http://dx.doi.org/10.1103/PhysRevB.94.060412. Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 1.18 MB

https://arxiv.org/abs/1603.04999

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290 Citations
1 Article (Academic Journal)

Temperature dependence of spin diffusion length and spin Hall angle in Au and Pt
Isasa, M., Villamor, E., Hueso, L. E., Gradhand, M. & Casanova, F., 5 Jan 2015, In: Physical Review B: Condensed Matter and Materials Physics. 91, 7 p., 024402 .
Research output: Contribution to journal › Article (Academic Journal) › peer-review

Open Access
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254 Citations (Scopus)

900 Downloads (Pure)

1 Fellowship awarded competitively

Early Career Fellowship - Spin dependent transport in superconductors.
Gradhand, M. (Recipient)
1 Nov 2013 → 1 Nov 2016
Activity: Other activity types › Fellowship awarded competitively

HPC (High Performance Computing) and HTC (High Throughput Computing) Facilities
Alam, S. R. (Manager), Williams, D. A. G. (Manager), Eccleston, P. E. (Manager) & Greene, D. (Manager)
Facility/equipment: Facility

Dr Martin Gradhand
- M.Gradhandbristol.acuk
- School of Physics - Honorary Senior Lecturer
Person: Honorary and Visiting Academic

Cite this

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title = "Tuning the spin Hall effect of Pt from the moderately dirty to the superclean regime",

abstract = "We systematically measure and analyze the spin diffusion length and the spin Hall effect in Pt with a wide range of conductivities using the spin absorption method in lateral spin valve devices. We observe a linear relation between the spin diffusion length and the conductivity, evidencing that the spin relaxation in Pt is governed by the Elliott-Yafet mechanism. We find a single intrinsic spin Hall conductivity (σintSH=1600±150Ω−1cm−1) for Pt in the full range studied which is in good agreement with theory. We have obtained the crossover between the moderately dirty and the superclean scaling regimes of the spin Hall effect by tuning the conductivity. This is equivalent to that obtained for the anomalous Hall effect. Our results explain the spread of the spin Hall angle values in the literature and find a route to maximize this important parameter.",

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doi = "10.1103/PhysRevB.94.060412",

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AU - Sagasta, Edurne

AU - Omori, Yasumoto

AU - Isasa, Miren

AU - Gradhand, Martin

AU - Hueso, Luis E.

AU - Niimi, Yasuhiro

AU - Otani, Yoshichika

AU - Casanova, Fèlix

N1 - proxy date of acceptance added to output record.

PY - 2016/8/30

Y1 - 2016/8/30

N2 - We systematically measure and analyze the spin diffusion length and the spin Hall effect in Pt with a wide range of conductivities using the spin absorption method in lateral spin valve devices. We observe a linear relation between the spin diffusion length and the conductivity, evidencing that the spin relaxation in Pt is governed by the Elliott-Yafet mechanism. We find a single intrinsic spin Hall conductivity (σintSH=1600±150Ω−1cm−1) for Pt in the full range studied which is in good agreement with theory. We have obtained the crossover between the moderately dirty and the superclean scaling regimes of the spin Hall effect by tuning the conductivity. This is equivalent to that obtained for the anomalous Hall effect. Our results explain the spread of the spin Hall angle values in the literature and find a route to maximize this important parameter.

AB - We systematically measure and analyze the spin diffusion length and the spin Hall effect in Pt with a wide range of conductivities using the spin absorption method in lateral spin valve devices. We observe a linear relation between the spin diffusion length and the conductivity, evidencing that the spin relaxation in Pt is governed by the Elliott-Yafet mechanism. We find a single intrinsic spin Hall conductivity (σintSH=1600±150Ω−1cm−1) for Pt in the full range studied which is in good agreement with theory. We have obtained the crossover between the moderately dirty and the superclean scaling regimes of the spin Hall effect by tuning the conductivity. This is equivalent to that obtained for the anomalous Hall effect. Our results explain the spread of the spin Hall angle values in the literature and find a route to maximize this important parameter.

U2 - 10.1103/PhysRevB.94.060412

DO - 10.1103/PhysRevB.94.060412

M3 - Article (Academic Journal)

SN - 2469-9950

VL - 94

JO - Physical Review B

JF - Physical Review B

M1 - 060412(R)

ER -

Tuning the spin Hall effect of Pt from the moderately dirty to the superclean regime

Abstract

Bibliographical note

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Research output

Temperature dependence of spin diffusion length and spin Hall angle in Au and Pt

Activities

Early Career Fellowship - Spin dependent transport in superconductors.

Equipment

HPC (High Performance Computing) and HTC (High Throughput Computing) Facilities

Profiles

Dr Martin Gradhand

Cite this