Strain-stabilized (π,π) order at the surface of Fe1+xTe

Chi Ming Yim; Soumendra Panja; Christopher Trainer; Craig Topping; Christoph Heil; Alexandra  Gibbs; Oxana Magdysyuk; Vladimir Tsurkan; Alois Loidl; Andreas W. Rost; Peter  Wahl

doi:10.1021/acs.nanolett.0c04821

Strain-stabilized (π,π) order at the surface of Fe_1+xTe

Chi Ming Yim^*, Soumendra Panja, Christopher Trainer, Craig Topping, Christoph Heil, Alexandra Gibbs , Oxana Magdysyuk, Vladimir Tsurkan, Alois Loidl, Andreas W. Rost, Peter Wahl^*

^*Corresponding author for this work

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

Abstract

A key property of many quantum materials is that their ground state depends sensitively on small changes of an external tuning parameter, e.g., doping, magnetic field, or pressure, creating opportunities for potential technological applications. Here, we explore tuning of the ground state of the nonsuperconducting parent compound, Fe_1+xTe, of the iron chalcogenides by uniaxial strain. Iron telluride exhibits a peculiar (π, 0) antiferromagnetic order unlike the (π, π) order observed in the Fe-pnictide superconductors. The (π, 0) order is accompanied by a significant monoclinic distortion. We explore tuning of the ground state by uniaxial strain combined with low-temperature scanning tunneling microscopy. We demonstrate that, indeed under strain, the surface of Fe_1.1Te undergoes a transition to a (π, π)-charge-ordered state. Comparison with transport experiments on uniaxially strained samples shows that this is a surface phase, demonstrating the opportunities afforded by 2D correlated phases stabilized near surfaces and interfaces.

Original language	English
Pages (from-to)	2786-2792
Number of pages	7
Journal	Nano Letters
Volume	21
Issue number	7
Early online date	2 Apr 2021
DOIs	https://doi.org/10.1021/acs.nanolett.0c04821
Publication status	Published - 14 Apr 2021

Keywords

Uniaxial strain
Iron telluride
Low-temparature scanning tunneling microscopy
Charge order

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10.1021/acs.nanolett.0c04821Licence: CC BY

Yim_2021_NL_Strain-stablized_CC
Copyright © 2021 The Author(s). Published by the American Chemical Society. Open Access article licenced under under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Final published version, 5.54 MBLicence: CC BY

Designer Quantum Materials: Designer Quantum Materials - Thermodynamics and Transport
Rost, A. W. (PI)
EPSRC
1/10/17 → 30/09/22
Project: Fellowship

Strain-stabilized (π,π) order at the surface of FeTe (dataset)
Yim, C. M. (Creator), Panja, S. (Creator), Trainer, C. W. J. (Creator), Topping, C. V. (Creator), Heil, C. (Creator), Gibbs, A. (Creator), Magdysyuk, O. (Creator), Tsurkan, V. (Creator), Loidl, A. (Creator), Rost, A. W. (Creator) & Wahl, P. (Creator), University of St Andrews, 12 Apr 2021
DOI: 10.17630/50ccad17-9f3e-4806-a78f-38e56c8cea59
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Cite this

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title = "Strain-stabilized (π,π) order at the surface of Fe1+xTe",

abstract = "A key property of many quantum materials is that their ground state depends sensitively on small changes of an external tuning parameter, e.g., doping, magnetic field, or pressure, creating opportunities for potential technological applications. Here, we explore tuning of the ground state of the nonsuperconducting parent compound, Fe1+xTe, of the iron chalcogenides by uniaxial strain. Iron telluride exhibits a peculiar (π, 0) antiferromagnetic order unlike the (π, π) order observed in the Fe-pnictide superconductors. The (π, 0) order is accompanied by a significant monoclinic distortion. We explore tuning of the ground state by uniaxial strain combined with low-temperature scanning tunneling microscopy. We demonstrate that, indeed under strain, the surface of Fe1.1Te undergoes a transition to a (π, π)-charge-ordered state. Comparison with transport experiments on uniaxially strained samples shows that this is a surface phase, demonstrating the opportunities afforded by 2D correlated phases stabilized near surfaces and interfaces.",

keywords = "Uniaxial strain, Iron telluride, Low-temparature scanning tunneling microscopy, Charge order",

author = "Yim, {Chi Ming} and Soumendra Panja and Christopher Trainer and Craig Topping and Christoph Heil and Alexandra Gibbs and Oxana Magdysyuk and Vladimir Tsurkan and Alois Loidl and Rost, {Andreas W.} and Peter Wahl",

note = "C.M.Y., S.N.P., A.W.R., and P.W. acknowledge support from EPSRC through EP/S005005/1, and C.To. and A.W.R. through EP/P024564/1. C.M.Y. acknowledges additional support from a Shanghai talent program and funding through the Shanghai Pujiang Program (20PJ1408200). C.H. acknowledges support from the Austrian Science Fund (FWF), project no. P 32144-N36, and the VSC4 of the Vienna University of Technology.",

year = "2021",

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doi = "10.1021/acs.nanolett.0c04821",

language = "English",

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T1 - Strain-stabilized (π,π) order at the surface of Fe1+xTe

AU - Yim, Chi Ming

AU - Panja, Soumendra

AU - Trainer, Christopher

AU - Topping, Craig

AU - Heil, Christoph

AU - Gibbs , Alexandra

AU - Magdysyuk, Oxana

AU - Tsurkan, Vladimir

AU - Loidl, Alois

AU - Rost, Andreas W.

AU - Wahl, Peter

N1 - C.M.Y., S.N.P., A.W.R., and P.W. acknowledge support from EPSRC through EP/S005005/1, and C.To. and A.W.R. through EP/P024564/1. C.M.Y. acknowledges additional support from a Shanghai talent program and funding through the Shanghai Pujiang Program (20PJ1408200). C.H. acknowledges support from the Austrian Science Fund (FWF), project no. P 32144-N36, and the VSC4 of the Vienna University of Technology.

PY - 2021/4/14

Y1 - 2021/4/14

N2 - A key property of many quantum materials is that their ground state depends sensitively on small changes of an external tuning parameter, e.g., doping, magnetic field, or pressure, creating opportunities for potential technological applications. Here, we explore tuning of the ground state of the nonsuperconducting parent compound, Fe1+xTe, of the iron chalcogenides by uniaxial strain. Iron telluride exhibits a peculiar (π, 0) antiferromagnetic order unlike the (π, π) order observed in the Fe-pnictide superconductors. The (π, 0) order is accompanied by a significant monoclinic distortion. We explore tuning of the ground state by uniaxial strain combined with low-temperature scanning tunneling microscopy. We demonstrate that, indeed under strain, the surface of Fe1.1Te undergoes a transition to a (π, π)-charge-ordered state. Comparison with transport experiments on uniaxially strained samples shows that this is a surface phase, demonstrating the opportunities afforded by 2D correlated phases stabilized near surfaces and interfaces.

AB - A key property of many quantum materials is that their ground state depends sensitively on small changes of an external tuning parameter, e.g., doping, magnetic field, or pressure, creating opportunities for potential technological applications. Here, we explore tuning of the ground state of the nonsuperconducting parent compound, Fe1+xTe, of the iron chalcogenides by uniaxial strain. Iron telluride exhibits a peculiar (π, 0) antiferromagnetic order unlike the (π, π) order observed in the Fe-pnictide superconductors. The (π, 0) order is accompanied by a significant monoclinic distortion. We explore tuning of the ground state by uniaxial strain combined with low-temperature scanning tunneling microscopy. We demonstrate that, indeed under strain, the surface of Fe1.1Te undergoes a transition to a (π, π)-charge-ordered state. Comparison with transport experiments on uniaxially strained samples shows that this is a surface phase, demonstrating the opportunities afforded by 2D correlated phases stabilized near surfaces and interfaces.

KW - Uniaxial strain

KW - Iron telluride

KW - Low-temparature scanning tunneling microscopy

KW - Charge order

U2 - 10.1021/acs.nanolett.0c04821

DO - 10.1021/acs.nanolett.0c04821

M3 - Article

SN - 1530-6984

VL - 21

SP - 2786

EP - 2792

JO - Nano Letters

JF - Nano Letters

IS - 7

ER -

Strain-stabilized (π,π) order at the surface of Fe1+xTe

Abstract

Keywords

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Projects

Designer Quantum Materials: Designer Quantum Materials - Thermodynamics and Transport

Datasets

Strain-stabilized (π,π) order at the surface of FeTe (dataset)

Cite this

Strain-stabilized (π,π) order at the surface of Fe_1+xTe