PMID- 32584582
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200930
IS  - 1530-6992 (Electronic)
IS  - 1530-6984 (Linking)
VI  - 20
IP  - 8
DP  - 2020 Aug 12
TI  - Control of Spin-Orbit Torques by Interface Engineering in Topological Insulator 
      Heterostructures.
PG  - 5893-5899
LID - 10.1021/acs.nanolett.0c01850 [doi]
AB  - (Bi(1-x)Sb(x))(2)Te(3) topological insulators (TIs) are gathering increasing 
      attention owing to their large charge-to-spin conversion efficiency and the 
      ensuing spin-orbit torques (SOTs) that can be used to manipulate the 
      magnetization of a ferromagnet (FM). The origin of the torques, however, remains 
      elusive, while the implications of hybridized states and the strong material 
      intermixing at the TI/FM interface are essentially unexplored. By combining 
      interface chemical analysis and spin-transfer ferromagnetic resonance (ST-FMR) 
      measurements, we demonstrate that intermixing plays a critical role in the 
      generation of SOTs. By inserting a suitable normal metal spacer, material 
      intermixing is reduced and the TI properties at the interface are largely 
      improved, resulting in strong variations in the nature of the SOTs. A dramatic 
      enhancement of a field-like torque, opposing and surpassing the Oersted-field 
      torque, is observed, which can be attributed to the non-equilibrium spin density 
      in Rashba-split surface bands and to the suppression of spin memory loss. These 
      phenomena can play a relevant role at other interfaces, such as those comprising 
      transition metal dichalcogenides.
FAU - Bonell, Frederic
AU  - Bonell F
AUID- ORCID: 0000-0001-7296-0404
AD  - Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and The 
      Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, 
      08193 Barcelona, Spain.
FAU - Goto, Minori
AU  - Goto M
AD  - Graduate School of Engineering Science and Center for Spintronics Research 
      Network (CSRN), Osaka University, Toyonaka, Osaka 560-8531, Japan.
FAU - Sauthier, Guillaume
AU  - Sauthier G
AD  - Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and The 
      Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, 
      08193 Barcelona, Spain.
FAU - Sierra, Juan F
AU  - Sierra JF
AD  - Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and The 
      Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, 
      08193 Barcelona, Spain.
FAU - Figueroa, Adriana I
AU  - Figueroa AI
AD  - Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and The 
      Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, 
      08193 Barcelona, Spain.
FAU - Costache, Marius V
AU  - Costache MV
AD  - Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and The 
      Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, 
      08193 Barcelona, Spain.
FAU - Miwa, Shinji
AU  - Miwa S
AUID- ORCID: 0000-0001-9131-6753
AD  - Graduate School of Engineering Science and Center for Spintronics Research 
      Network (CSRN), Osaka University, Toyonaka, Osaka 560-8531, Japan.
FAU - Suzuki, Yoshishige
AU  - Suzuki Y
AD  - Graduate School of Engineering Science and Center for Spintronics Research 
      Network (CSRN), Osaka University, Toyonaka, Osaka 560-8531, Japan.
FAU - Valenzuela, Sergio O
AU  - Valenzuela SO
AUID- ORCID: 0000-0002-4632-8891
AD  - Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and The 
      Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, 
      08193 Barcelona, Spain.
AD  - Institucio Catalana de Recerca i Estudis Avancats (ICREA), 08070 Barcelona, 
      Spain.
LA  - eng
PT  - Journal Article
DEP - 20200702
PL  - United States
TA  - Nano Lett
JT  - Nano letters
JID - 101088070
SB  - IM
OTO - NOTNLM
OT  - Topological insulator
OT  - spin memory loss
OT  - spin-torque ferromagnetic resonance
OT  - spin-orbit torque
EDAT- 2020/06/26 06:00
MHDA- 2020/06/26 06:01
CRDT- 2020/06/26 06:00
PHST- 2020/06/26 06:00 [pubmed]
PHST- 2020/06/26 06:01 [medline]
PHST- 2020/06/26 06:00 [entrez]
AID - 10.1021/acs.nanolett.0c01850 [doi]
PST - ppublish
SO  - Nano Lett. 2020 Aug 12;20(8):5893-5899. doi: 10.1021/acs.nanolett.0c01850. Epub 
      2020 Jul 2.