Polytypic Two-Dimensional FeAs with High Anisotropy

Jongbum Won; Jihong Bae; Hyesoo Kim; Taeyoung Kim; Narguess Nemati; Sangjin Choi; Myung Chul Jung; Sungsoon Kim; Hong Choi; Bokyeong Kim; Dana Jin; Minjun Kim; Myung Joon Han; Jong Young Kim; Wooyoung Shim

doi:10.1021/acs.nanolett.3c03324

Polytypic Two-Dimensional FeAs with High Anisotropy

Jongbum Won, Jihong Bae, Hyesoo Kim, Taeyoung Kim, Narguess Nemati, Sangjin Choi, Myung Chul Jung, Sungsoon Kim, Hong Choi, Bokyeong Kim, Dana Jin, Minjun Kim, Myung Joon Han, Jong Young Kim, Wooyoung Shim^*

^*Corresponding author af dette arbejde

Institut for Mekanik og Produktion - Mekanik og Materialer

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Letter › peer review

1 Citationer (Scopus)

Abstract

In the realm of two-dimensional (2D) crystal growth, the chemical composition often determines the thermodynamically favored crystallographic structures. This relationship poses a challenge in synthesizing novel 2D crystals without altering their chemical elements, resulting in the rarity of achieving specific crystallographic symmetries or lattice parameters. We present 2D polymorphic FeAs crystals that completely differ from bulk orthorhombic FeAs (Pnma), differing in the stacking sequence, i.e., polytypes. Preparing polytypic FeAs outlines a strategy for independently controlling each symmetry operator, which includes the mirror plane for 2Q-FeAs (I4/mmm) and the glide plane for 1Q-FeAs (P4/nmm). As such, compared to bulk FeAs, polytypic 2D FeAs shows highly anisotropic properties such as electrical conductivity, Young’s modulus, and friction coefficient. This work represents a concept of expanding 2D crystal libraries with a given chemical composition but various crystal symmetries.

Originalsprog	Engelsk
Tidsskrift	Nano Letters
Vol/bind	23
Nummer	23
Sider (fra-til)	11057-11065
Antal sider	9
ISSN	1530-6984
DOI	https://doi.org/10.1021/acs.nanolett.3c03324
Status	Udgivet - dec. 2023

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title = "Polytypic Two-Dimensional FeAs with High Anisotropy",

abstract = "In the realm of two-dimensional (2D) crystal growth, the chemical composition often determines the thermodynamically favored crystallographic structures. This relationship poses a challenge in synthesizing novel 2D crystals without altering their chemical elements, resulting in the rarity of achieving specific crystallographic symmetries or lattice parameters. We present 2D polymorphic FeAs crystals that completely differ from bulk orthorhombic FeAs (Pnma), differing in the stacking sequence, i.e., polytypes. Preparing polytypic FeAs outlines a strategy for independently controlling each symmetry operator, which includes the mirror plane for 2Q-FeAs (I4/mmm) and the glide plane for 1Q-FeAs (P4/nmm). As such, compared to bulk FeAs, polytypic 2D FeAs shows highly anisotropic properties such as electrical conductivity, Young{\textquoteright}s modulus, and friction coefficient. This work represents a concept of expanding 2D crystal libraries with a given chemical composition but various crystal symmetries.",

keywords = "B{\"a}rnighausen tree, Interlayer coupling, Iron arsenide, Polytypism, Two-dimensional material",

author = "Jongbum Won and Jihong Bae and Hyesoo Kim and Taeyoung Kim and Narguess Nemati and Sangjin Choi and Jung, {Myung Chul} and Sungsoon Kim and Hong Choi and Bokyeong Kim and Dana Jin and Minjun Kim and Han, {Myung Joon} and Kim, {Jong Young} and Wooyoung Shim",

note = "Publisher Copyright: {\textcopyright} 2023 American Chemical Society.",

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doi = "10.1021/acs.nanolett.3c03324",

language = "English",

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T1 - Polytypic Two-Dimensional FeAs with High Anisotropy

AU - Won, Jongbum

AU - Bae, Jihong

AU - Kim, Hyesoo

AU - Kim, Taeyoung

AU - Nemati, Narguess

AU - Choi, Sangjin

AU - Jung, Myung Chul

AU - Kim, Sungsoon

AU - Choi, Hong

AU - Kim, Bokyeong

AU - Jin, Dana

AU - Kim, Minjun

AU - Han, Myung Joon

AU - Kim, Jong Young

AU - Shim, Wooyoung

PY - 2023/12

Y1 - 2023/12

N2 - In the realm of two-dimensional (2D) crystal growth, the chemical composition often determines the thermodynamically favored crystallographic structures. This relationship poses a challenge in synthesizing novel 2D crystals without altering their chemical elements, resulting in the rarity of achieving specific crystallographic symmetries or lattice parameters. We present 2D polymorphic FeAs crystals that completely differ from bulk orthorhombic FeAs (Pnma), differing in the stacking sequence, i.e., polytypes. Preparing polytypic FeAs outlines a strategy for independently controlling each symmetry operator, which includes the mirror plane for 2Q-FeAs (I4/mmm) and the glide plane for 1Q-FeAs (P4/nmm). As such, compared to bulk FeAs, polytypic 2D FeAs shows highly anisotropic properties such as electrical conductivity, Young’s modulus, and friction coefficient. This work represents a concept of expanding 2D crystal libraries with a given chemical composition but various crystal symmetries.

AB - In the realm of two-dimensional (2D) crystal growth, the chemical composition often determines the thermodynamically favored crystallographic structures. This relationship poses a challenge in synthesizing novel 2D crystals without altering their chemical elements, resulting in the rarity of achieving specific crystallographic symmetries or lattice parameters. We present 2D polymorphic FeAs crystals that completely differ from bulk orthorhombic FeAs (Pnma), differing in the stacking sequence, i.e., polytypes. Preparing polytypic FeAs outlines a strategy for independently controlling each symmetry operator, which includes the mirror plane for 2Q-FeAs (I4/mmm) and the glide plane for 1Q-FeAs (P4/nmm). As such, compared to bulk FeAs, polytypic 2D FeAs shows highly anisotropic properties such as electrical conductivity, Young’s modulus, and friction coefficient. This work represents a concept of expanding 2D crystal libraries with a given chemical composition but various crystal symmetries.

KW - Bärnighausen tree

KW - Interlayer coupling

KW - Iron arsenide

KW - Polytypism

KW - Two-dimensional material

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U2 - 10.1021/acs.nanolett.3c03324

DO - 10.1021/acs.nanolett.3c03324

M3 - Letter

C2 - 38048278

AN - SCOPUS:85180008809

SN - 1530-6984

VL - 23

SP - 11057

EP - 11065

JO - Nano Letters

JF - Nano Letters

IS - 23

ER -

Polytypic Two-Dimensional FeAs with High Anisotropy

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