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

DOI: 10.1021/acs.nanolett.0c04821 DOI Help

Authors: Chi Ming Yim (University of St. Andrews; Shanghai Jiao Tong University) , Soumendra Nath Panja (University of St. Andrews) , Christopher Trainer (University of St. Andrews) , Craig Topping (University of St. Andrews) , Christoph Heil (University of St. Andrews) , Alexandra S. Gibbs (ISIS Neutron and Muon Source; University of St. Andrews; Max Planck Institute for Solid State Research) , Oxana Magdysyuk (Diamond Light Source) , Vladimir Tsurkan (University of Augsburg; Institute of Applied Physics, Republic of Moldova) , Alois Loidl (University of Augsburg) , Andreas W. Rost (University of St. Andrews) , Peter Wahl (University of St. Andrews)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nano Letters

State: Published (Approved)
Published: April 2021
Diamond Proposal Number(s): 22974

Open Access Open Access

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.

Journal Keywords: Uniaxial strain; iron telluride; low-temperature scanning tunneling microscopy; charge order

Subject Areas: Materials, Physics

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Added On: 05/04/2021 09:13


Discipline Tags:

Superconductors Quantum Materials Physics Materials Science

Technical Tags:

Diffraction Single Crystal X-ray Diffraction (SXRD)