Thin-Film TaAs: Developing a Platform for Weyl Semimetal Devices

Jocienne Nelson; Anthony Rice; Rafal Kurleto; Amanda Shackelford; Zachary Sierzega; Peipei Hao; Bryan Berggren; Chun-Sheng Jiang; Andrew Norman; Megan Holtz; John Mangum; Ian Leahy; Karen Heinselman; Herve Ness; Mark van Schilfgaarde; Daniel Dessau; Kirstin Alberi

doi:10.1016/j.matt.2023.06.018

Thin-Film TaAs: Developing a Platform for Weyl Semimetal Devices

Jocienne Nelson, Anthony Rice, Rafal Kurleto, Amanda Shackelford, Zachary Sierzega, Peipei Hao, Bryan Berggren, Chun-Sheng Jiang, Andrew Norman, Megan Holtz, John Mangum, Ian Leahy, Karen Heinselman, Herve Ness, Mark van Schilfgaarde, Daniel Dessau, Kirstin Alberi

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

6 Scopus Citations

Abstract

MX monopnictide compounds (M = Nb,Ta, X = As,P) are prototypical 3D Weyl semimetals (WSMs) that have been shown in bulk single crystal form to have potential for a wide variety of novel devices due to topologically protected band structures and high mobilities. However, very little is known about thin-film synthesis, which is essential to enable device applications. We synthesize TaAs(001) epilayers by molecular beam epitaxy on GaAs(001) and provide an experimental phase diagram illustrating conditions for single-phase, single-crystal-like growth. We investigate the relationship between nanoscale defects and electronic structure using angle-resolved photoemission spectroscopy, kelvin probe force microscopy, and transmission electron microscopy. Our results provide a roadmap and platform for developing 3D WSMs for device applications.

Original language	American English
Pages (from-to)	2886-2899
Number of pages	14
Journal	Matter
Volume	6
Issue number	9
DOIs	https://doi.org/10.1016/j.matt.2023.06.018
State	Published - 2023

NREL Publication Number

NREL/JA-5K00-85458

Keywords

angle-resolved photoemission spectroscopy
defects
disorder
interfaces
magnetotransport
molecular beam epitaxy
scanning probe microscopy
synthesis
thin film
topological semimetal

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10.1016/j.matt.2023.06.018

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title = "Thin-Film TaAs: Developing a Platform for Weyl Semimetal Devices",

abstract = "MX monopnictide compounds (M = Nb,Ta, X = As,P) are prototypical 3D Weyl semimetals (WSMs) that have been shown in bulk single crystal form to have potential for a wide variety of novel devices due to topologically protected band structures and high mobilities. However, very little is known about thin-film synthesis, which is essential to enable device applications. We synthesize TaAs(001) epilayers by molecular beam epitaxy on GaAs(001) and provide an experimental phase diagram illustrating conditions for single-phase, single-crystal-like growth. We investigate the relationship between nanoscale defects and electronic structure using angle-resolved photoemission spectroscopy, kelvin probe force microscopy, and transmission electron microscopy. Our results provide a roadmap and platform for developing 3D WSMs for device applications.",

keywords = "angle-resolved photoemission spectroscopy, defects, disorder, interfaces, magnetotransport, molecular beam epitaxy, scanning probe microscopy, synthesis, thin film, topological semimetal",

author = "Jocienne Nelson and Anthony Rice and Rafal Kurleto and Amanda Shackelford and Zachary Sierzega and Peipei Hao and Bryan Berggren and Chun-Sheng Jiang and Andrew Norman and Megan Holtz and John Mangum and Ian Leahy and Karen Heinselman and Herve Ness and {van Schilfgaarde}, Mark and Daniel Dessau and Kirstin Alberi",

year = "2023",

doi = "10.1016/j.matt.2023.06.018",

language = "American English",

volume = "6",

pages = "2886--2899",

journal = "Matter",

issn = "2590-2393",

publisher = "Cell Press",

number = "9",

}

TY - JOUR

T1 - Thin-Film TaAs: Developing a Platform for Weyl Semimetal Devices

AU - Nelson, Jocienne

AU - Rice, Anthony

AU - Kurleto, Rafal

AU - Shackelford, Amanda

AU - Sierzega, Zachary

AU - Hao, Peipei

AU - Berggren, Bryan

AU - Jiang, Chun-Sheng

AU - Norman, Andrew

AU - Holtz, Megan

AU - Mangum, John

AU - Leahy, Ian

AU - Heinselman, Karen

AU - Ness, Herve

AU - van Schilfgaarde, Mark

AU - Dessau, Daniel

AU - Alberi, Kirstin

PY - 2023

Y1 - 2023

N2 - MX monopnictide compounds (M = Nb,Ta, X = As,P) are prototypical 3D Weyl semimetals (WSMs) that have been shown in bulk single crystal form to have potential for a wide variety of novel devices due to topologically protected band structures and high mobilities. However, very little is known about thin-film synthesis, which is essential to enable device applications. We synthesize TaAs(001) epilayers by molecular beam epitaxy on GaAs(001) and provide an experimental phase diagram illustrating conditions for single-phase, single-crystal-like growth. We investigate the relationship between nanoscale defects and electronic structure using angle-resolved photoemission spectroscopy, kelvin probe force microscopy, and transmission electron microscopy. Our results provide a roadmap and platform for developing 3D WSMs for device applications.

AB - MX monopnictide compounds (M = Nb,Ta, X = As,P) are prototypical 3D Weyl semimetals (WSMs) that have been shown in bulk single crystal form to have potential for a wide variety of novel devices due to topologically protected band structures and high mobilities. However, very little is known about thin-film synthesis, which is essential to enable device applications. We synthesize TaAs(001) epilayers by molecular beam epitaxy on GaAs(001) and provide an experimental phase diagram illustrating conditions for single-phase, single-crystal-like growth. We investigate the relationship between nanoscale defects and electronic structure using angle-resolved photoemission spectroscopy, kelvin probe force microscopy, and transmission electron microscopy. Our results provide a roadmap and platform for developing 3D WSMs for device applications.

KW - angle-resolved photoemission spectroscopy

KW - defects

KW - disorder

KW - interfaces

KW - magnetotransport

KW - molecular beam epitaxy

KW - scanning probe microscopy

KW - synthesis

KW - thin film

KW - topological semimetal

UR - http://www.scopus.com/inward/record.url?scp=85169046377&partnerID=8YFLogxK

U2 - 10.1016/j.matt.2023.06.018

DO - 10.1016/j.matt.2023.06.018

M3 - Article

SN - 2590-2393

VL - 6

SP - 2886

EP - 2899

JO - Matter

JF - Matter

IS - 9

ER -

Thin-Film TaAs: Developing a Platform for Weyl Semimetal Devices

Abstract

NREL Publication Number

Keywords

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