Interlayer-glide-driven isosymmetric phase transition in compressed In 2Se3

Feng Ke; Cailong Liu; Yang Gao; Junkai Zhang; Dayong Tan; Yonghao Han; Yanzhang Ma; Jinfu Shu; Wenge Yang; Bin Chen; Ho Kwang Mao; Xiao Jia Chen; Chunxiao Gao

doi:10.1063/1.4879832

Interlayer-glide-driven isosymmetric phase transition in compressed In ₂Se₃

Feng Ke, Cailong Liu, Yang Gao, Junkai Zhang, Dayong Tan, Yonghao Han, Yanzhang Ma, Jinfu Shu, Wenge Yang, Bin Chen, Ho Kwang Mao, Xiao Jia Chen, Chunxiao Gao

Mechanical Engineering

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

27 Scopus citations

Abstract

We report an anomalous phase transition in compressed In₂Se ₃. The high-pressure studies indicate that In₂Se ₃ transforms to a new isosymmetric R-3m structure at 0.8 GPa whilst the volume collapses by ∼7%. This phase transition involves a pressure-induced interlayer shear glide with respect to one another. Consequently, the outer Se atoms of one sheet locate into the interstitial sites of three Se atoms in the neighboring sheets that are weakly connected by van der Waals interaction. Interestingly, this interlayer shear glide changes the stacking sequence significantly but leaves crystal symmetry unaffected. This study provides an insight to the mechanisms of the intriguing isosymmetric phase transition.

Original language	English
Article number	212102
Journal	Applied Physics Letters
Volume	104
Issue number	21
DOIs	https://doi.org/10.1063/1.4879832
State	Published - May 26 2014

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title = "Interlayer-glide-driven isosymmetric phase transition in compressed In 2Se3",

abstract = "We report an anomalous phase transition in compressed In2Se 3. The high-pressure studies indicate that In2Se 3 transforms to a new isosymmetric R-3m structure at 0.8 GPa whilst the volume collapses by ∼7%. This phase transition involves a pressure-induced interlayer shear glide with respect to one another. Consequently, the outer Se atoms of one sheet locate into the interstitial sites of three Se atoms in the neighboring sheets that are weakly connected by van der Waals interaction. Interestingly, this interlayer shear glide changes the stacking sequence significantly but leaves crystal symmetry unaffected. This study provides an insight to the mechanisms of the intriguing isosymmetric phase transition.",

author = "Feng Ke and Cailong Liu and Yang Gao and Junkai Zhang and Dayong Tan and Yonghao Han and Yanzhang Ma and Jinfu Shu and Wenge Yang and Bin Chen and Mao, {Ho Kwang} and Chen, {Xiao Jia} and Chunxiao Gao",

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T1 - Interlayer-glide-driven isosymmetric phase transition in compressed In 2Se3

AU - Ke, Feng

AU - Liu, Cailong

AU - Gao, Yang

AU - Zhang, Junkai

AU - Tan, Dayong

AU - Han, Yonghao

AU - Ma, Yanzhang

AU - Shu, Jinfu

AU - Yang, Wenge

AU - Chen, Bin

AU - Mao, Ho Kwang

AU - Chen, Xiao Jia

AU - Gao, Chunxiao

PY - 2014/5/26

Y1 - 2014/5/26

N2 - We report an anomalous phase transition in compressed In2Se 3. The high-pressure studies indicate that In2Se 3 transforms to a new isosymmetric R-3m structure at 0.8 GPa whilst the volume collapses by ∼7%. This phase transition involves a pressure-induced interlayer shear glide with respect to one another. Consequently, the outer Se atoms of one sheet locate into the interstitial sites of three Se atoms in the neighboring sheets that are weakly connected by van der Waals interaction. Interestingly, this interlayer shear glide changes the stacking sequence significantly but leaves crystal symmetry unaffected. This study provides an insight to the mechanisms of the intriguing isosymmetric phase transition.

AB - We report an anomalous phase transition in compressed In2Se 3. The high-pressure studies indicate that In2Se 3 transforms to a new isosymmetric R-3m structure at 0.8 GPa whilst the volume collapses by ∼7%. This phase transition involves a pressure-induced interlayer shear glide with respect to one another. Consequently, the outer Se atoms of one sheet locate into the interstitial sites of three Se atoms in the neighboring sheets that are weakly connected by van der Waals interaction. Interestingly, this interlayer shear glide changes the stacking sequence significantly but leaves crystal symmetry unaffected. This study provides an insight to the mechanisms of the intriguing isosymmetric phase transition.

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U2 - 10.1063/1.4879832

DO - 10.1063/1.4879832

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VL - 104

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 21

M1 - 212102

ER -

Interlayer-glide-driven isosymmetric phase transition in compressed In ₂Se₃

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