Defects in WSe2 investigated by Quasi-Particle Interference mapping and STM/STS

Matthew Edmonds; Adelina Ilie

Defects in WSe₂ investigated by Quasi-Particle Interference mapping and STM/STS

Research output: Contribution to conference › Other › peer-review

Abstract

Defects in transition metal dichalcogenides (TMDs) are local atomic modifications which can affect the electronic and magnetic properties of the material. Here we focus on WSe₂ which is one of the semiconducting TMDs and has great potential in both spintronics and valleytronics. We studied natural defects in WSe₂ crystals and monolayers by scanning tunnelling microscopy and spectroscopy (STM/STS), coupled with quasiparticle interference (QPI) mapping, at 4K and 77K. Among a large variety of defect configurations, we identified a few that based on QPI appear to support spin-flip processes. We have also studied monolayers of WSe₂ on atomically flat metallic surfaces and used QPI to characterise their interaction and defect behaviour.

Original language	English
Publication status	Published - 12 Jul 2018
Event	Conference on Physics of Defects in Solids: Quantum Mechanics Meets Topology - International Centre for Theoretical Physics, Trieste, Italy Duration: 9 Jul 2018 → 13 Jul 2018 Conference number: smr 3221 http://indico.ictp.it/event/8321/overview

Conference

Conference	Conference on Physics of Defects in Solids: Quantum Mechanics Meets Topology
Country/Territory	Italy
City	Trieste
Period	9/07/18 → 13/07/18
Internet address	http://indico.ictp.it/event/8321/overview

Cite this

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title = "Defects in WSe2 investigated by Quasi-Particle Interference mapping and STM/STS",

abstract = "Defects in transition metal dichalcogenides (TMDs) are local atomic modifications which can affect the electronic and magnetic properties of the material. Here we focus on WSe2 which is one of the semiconducting TMDs and has great potential in both spintronics and valleytronics. We studied natural defects in WSe2 crystals and monolayers by scanning tunnelling microscopy and spectroscopy (STM/STS), coupled with quasiparticle interference (QPI) mapping, at 4K and 77K. Among a large variety of defect configurations, we identified a few that based on QPI appear to support spin-flip processes. We have also studied monolayers of WSe2 on atomically flat metallic surfaces and used QPI to characterise their interaction and defect behaviour.",

author = "Matthew Edmonds and Adelina Ilie",

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day = "12",

language = "English",

note = "Conference on Physics of Defects in Solids: Quantum Mechanics Meets Topology ; Conference date: 09-07-2018 Through 13-07-2018",

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TY - CONF

T1 - Defects in WSe2 investigated by Quasi-Particle Interference mapping and STM/STS

AU - Edmonds, Matthew

AU - Ilie, Adelina

N1 - Conference code: smr 3221

PY - 2018/7/12

Y1 - 2018/7/12

N2 - Defects in transition metal dichalcogenides (TMDs) are local atomic modifications which can affect the electronic and magnetic properties of the material. Here we focus on WSe2 which is one of the semiconducting TMDs and has great potential in both spintronics and valleytronics. We studied natural defects in WSe2 crystals and monolayers by scanning tunnelling microscopy and spectroscopy (STM/STS), coupled with quasiparticle interference (QPI) mapping, at 4K and 77K. Among a large variety of defect configurations, we identified a few that based on QPI appear to support spin-flip processes. We have also studied monolayers of WSe2 on atomically flat metallic surfaces and used QPI to characterise their interaction and defect behaviour.

AB - Defects in transition metal dichalcogenides (TMDs) are local atomic modifications which can affect the electronic and magnetic properties of the material. Here we focus on WSe2 which is one of the semiconducting TMDs and has great potential in both spintronics and valleytronics. We studied natural defects in WSe2 crystals and monolayers by scanning tunnelling microscopy and spectroscopy (STM/STS), coupled with quasiparticle interference (QPI) mapping, at 4K and 77K. Among a large variety of defect configurations, we identified a few that based on QPI appear to support spin-flip processes. We have also studied monolayers of WSe2 on atomically flat metallic surfaces and used QPI to characterise their interaction and defect behaviour.

M3 - Other

T2 - Conference on Physics of Defects in Solids: Quantum Mechanics Meets Topology

Y2 - 9 July 2018 through 13 July 2018

ER -

Defects in WSe2 investigated by Quasi-Particle Interference mapping and STM/STS

Abstract

Conference

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Defects in WSe₂ investigated by Quasi-Particle Interference mapping and STM/STS