TY - JOUR
T1 - Strain-Stabilized (π, π) Order at the Surface of Fe1+ xTe
AU - Yim, Chi Ming
AU - Panja, Soumendra Nath
AU - Trainer, Christopher
AU - Topping, Craig
AU - Heil, Christoph
AU - Gibbs, Alexandra S.
AU - Magdysyuk, Oxana V.
AU - Tsurkan, Vladimir
AU - Loidl, Alois
AU - Rost, Andreas W.
AU - Wahl, Peter
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 - charge order
KW - iron telluride
KW - low-temperature scanning tunneling microscopy
KW - Uniaxial strain
UR - http://www.scopus.com/inward/record.url?scp=85104275792&partnerID=8YFLogxK
U2 - 10.1021/acs.nanolett.0c04821
DO - 10.1021/acs.nanolett.0c04821
M3 - Letter
C2 - 33797261
AN - SCOPUS:85104275792
SN - 1530-6984
VL - 21
SP - 2786
EP - 2792
JO - Nano Letters
JF - Nano Letters
IS - 7
ER -