Unusual Pressure-Induced Periodic Lattice Distortion in SnSe2

Jianjun Ying, Hari Paudyal, Christoph Heil, Xiao-Jia Chen, Viktor V. Struzhkin, Elena R. Margine

Publikation: Beitrag in einer FachzeitschriftShort communicationForschungBegutachtung

Abstract

We performed high-pressure x-ray diffraction (XRD), Raman, and transport measurements combined with first-principles calculations to investigate the behavior of tin diselenide (SnSe2) under compression. The obtained single-crystal XRD data indicate the formation of a (1/3,1/3,0)-type superlattice above 17 GPa. According to our density functional theory results, the pressure-induced transition to the commensurate periodic lattice distortion (PLD) phase is due to the combined effect of strong Fermi surface nesting and electron-phonon coupling at a momentum wave vector q=(1/3,1/3,0). In contrast, similar PLD transitions associated with charge density wave (CDW) orderings in transition metal dichalcogenides (TMDs) do not involve significant Fermi surface nesting. The discovered pressure-induced PLD is quite remarkable, as pressure usually suppresses CDW phases in related materials. Our findings, therefore, provide new playgrounds to study the intricate mechanisms governing the emergence of PLD in TMD-related materials.
Originalspracheenglisch
Aufsatznummer027003
FachzeitschriftPhysical Review Letters
Jahrgang121
DOIs
PublikationsstatusVeröffentlicht - 12 Jul 2018

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Fermi surfaces
x ray diffraction
transition metals
tin
density functional theory
momentum
single crystals
electrons

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Ying, J., Paudyal, H., Heil, C., Chen, X-J., Struzhkin, V. V., & Margine, E. R. (2018). Unusual Pressure-Induced Periodic Lattice Distortion in SnSe2. Physical Review Letters, 121, [027003]. https://doi.org/10.1103/PhysRevLett.121.027003

Unusual Pressure-Induced Periodic Lattice Distortion in SnSe2. / Ying, Jianjun; Paudyal, Hari; Heil, Christoph; Chen, Xiao-Jia; Struzhkin, Viktor V.; Margine, Elena R.

in: Physical Review Letters, Jahrgang 121, 027003, 12.07.2018.

Publikation: Beitrag in einer FachzeitschriftShort communicationForschungBegutachtung

Ying, Jianjun ; Paudyal, Hari ; Heil, Christoph ; Chen, Xiao-Jia ; Struzhkin, Viktor V. ; Margine, Elena R. / Unusual Pressure-Induced Periodic Lattice Distortion in SnSe2. in: Physical Review Letters. 2018 ; Jahrgang 121.
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abstract = "We performed high-pressure x-ray diffraction (XRD), Raman, and transport measurements combined with first-principles calculations to investigate the behavior of tin diselenide (SnSe2) under compression. The obtained single-crystal XRD data indicate the formation of a (1/3,1/3,0)-type superlattice above 17 GPa. According to our density functional theory results, the pressure-induced transition to the commensurate periodic lattice distortion (PLD) phase is due to the combined effect of strong Fermi surface nesting and electron-phonon coupling at a momentum wave vector q=(1/3,1/3,0). In contrast, similar PLD transitions associated with charge density wave (CDW) orderings in transition metal dichalcogenides (TMDs) do not involve significant Fermi surface nesting. The discovered pressure-induced PLD is quite remarkable, as pressure usually suppresses CDW phases in related materials. Our findings, therefore, provide new playgrounds to study the intricate mechanisms governing the emergence of PLD in TMD-related materials.",
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T1 - Unusual Pressure-Induced Periodic Lattice Distortion in SnSe2

AU - Ying, Jianjun

AU - Paudyal, Hari

AU - Heil, Christoph

AU - Chen, Xiao-Jia

AU - Struzhkin, Viktor V.

AU - Margine, Elena R.

PY - 2018/7/12

Y1 - 2018/7/12

N2 - We performed high-pressure x-ray diffraction (XRD), Raman, and transport measurements combined with first-principles calculations to investigate the behavior of tin diselenide (SnSe2) under compression. The obtained single-crystal XRD data indicate the formation of a (1/3,1/3,0)-type superlattice above 17 GPa. According to our density functional theory results, the pressure-induced transition to the commensurate periodic lattice distortion (PLD) phase is due to the combined effect of strong Fermi surface nesting and electron-phonon coupling at a momentum wave vector q=(1/3,1/3,0). In contrast, similar PLD transitions associated with charge density wave (CDW) orderings in transition metal dichalcogenides (TMDs) do not involve significant Fermi surface nesting. The discovered pressure-induced PLD is quite remarkable, as pressure usually suppresses CDW phases in related materials. Our findings, therefore, provide new playgrounds to study the intricate mechanisms governing the emergence of PLD in TMD-related materials.

AB - We performed high-pressure x-ray diffraction (XRD), Raman, and transport measurements combined with first-principles calculations to investigate the behavior of tin diselenide (SnSe2) under compression. The obtained single-crystal XRD data indicate the formation of a (1/3,1/3,0)-type superlattice above 17 GPa. According to our density functional theory results, the pressure-induced transition to the commensurate periodic lattice distortion (PLD) phase is due to the combined effect of strong Fermi surface nesting and electron-phonon coupling at a momentum wave vector q=(1/3,1/3,0). In contrast, similar PLD transitions associated with charge density wave (CDW) orderings in transition metal dichalcogenides (TMDs) do not involve significant Fermi surface nesting. The discovered pressure-induced PLD is quite remarkable, as pressure usually suppresses CDW phases in related materials. Our findings, therefore, provide new playgrounds to study the intricate mechanisms governing the emergence of PLD in TMD-related materials.

UR - https://arxiv.org/abs/1807.04993

U2 - 10.1103/PhysRevLett.121.027003

DO - 10.1103/PhysRevLett.121.027003

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JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

M1 - 027003

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