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원자제어 저차원 전자계 연구단
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Structural versus electronic distortions in IrTe2 with broken symmetry

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Title
Structural versus electronic distortions in IrTe2 with broken symmetry
Author(s)
Hyo Sung Kim; Kim T.-H.; Yang J.; Cheong S.-W.; Han Woong Yeom
Publication Date
2014-11
Journal
PHYSICAL REVIEW B, v.90, no.20, pp.201103 -
Publisher
AMER PHYSICAL SOC
Abstract
We investigate atomic and electronic structures of the intriguing low-temperature phase of IrTe2 using high-resolution scanning tunneling microscopy and spectroscopy. We confirm various stripe superstructures such as ×3, ×5, and ×8. The strong vertical and lateral distortions of the lattice for the stripe structures are observed in agreement with recent calculations. The spatial modulations of electronic density of states are clearly identified as separated from the structural distortions. These structural and spectroscopic characteristics are not consistent with the charge-density wave and soliton lattice model proposed recently. Instead, we show that the Ir (Te) dimerization together with the Ir 5d charge ordering can explain these superstructures, supporting the Ir dimerization mechanism of the phase transition.
URI
http://pr.ibs.re.kr/handle/8788114/1449
DOI
10.1103/PhysRevB.90.201103
ISSN
1098-0121
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > Journal Papers (저널논문)
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