Strain-Stabilized (π, π) Order at the Surface of Fe1+xTe
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, , , , , , , , , , , , , , TSURKAN, Vladimir. Strain-Stabilized (π, π) Order at the Surface of Fe1+xTe. In: Nano letters, 2021, vol. 21, pp. 2786-2792. ISSN 1530-6984. DOI: https://doi.org/10.1021/acs.nanolett.0c04821
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Volumul 21 / 2021 / ISSN 1530-6984 /ISSNe 1530-6992

Strain-Stabilized (π, π) Order at the Surface of Fe1+xTe

DOI:https://doi.org/10.1021/acs.nanolett.0c04821

Pag. 2786-2792

12, 1, 1, 1, 3, 145, 6, Tsurkan Vladimir78, 7, 1, 1
 
1 University of St Andrews,
2 Shanghai Jiao Tong University,
3 Graz University of Technology,
4 Rutherford Appleton Laboratory, Harwell Oxford,
5 Max Planck Institute for Solid State Research,
6 Diamond Light Source, Didcot,
7 University of Augsburg,
8 Institute of Applied Physics, Academy of Sciences of Moldova
 
 
Disponibil în IBN: 29 aprilie 2021


Rezumat

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.

Cuvinte-cheie
charge order, iron telluride, low-temperature scanning tunneling microscopy, Uniaxial strain

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