Multi-layered Chalcogenides with potential for magnetism and superconductivity

Li Li; David S. Parker; Clarina R. dela Cruz; Athena S. Sefat

doi:10.1016/j.physc.2016.10.005

Multi-layered Chalcogenides with potential for magnetism and superconductivity

Li Li, David S. Parker, Clarina R. dela Cruz, Athena S. Sefat

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3 Scopus citations

Abstract

Layered thallium copper chalcogenides can form single, double, or triple layers of Cu–Ch separated by Tl sheets. Here we report on the preparation and properties of Tl-based materials of TlCu₂Se₂, TlCu₄S₃, TlCu₄Se₃ and TlCu₆S₄. Having no long-range magnetism for these materials is quite surprising considering the possibilities of inter- and intra-layer exchange interactions through Cu 3d, and we measure by magnetic susceptibility and confirm by neutron diffraction. First principles density-functional theory calculations for both the single-layer TlCu₂Se₂ (isostructural to the ‘122’ iron-based superconductors) and the double-layer TlCu₄Se₃ suggest a lack of Fermi-level spectral weight that is needed to drive a magnetic or superconducting instability. However, for multiple structural layers with Fe, there is much greater likelihood for magnetism and superconductivity.

Original language	English
Pages (from-to)	25-29
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	531
DOIs	https://doi.org/10.1016/j.physc.2016.10.005
State	Published - Dec 15 2016

Funding

This work was supported by the U. S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, Materials Science and Engineering Division (L.L, D.P, A.S) . The work at ORNL's High Flux Isotope Reactor (HFIR) was sponsored by the Scientific User Facilities Division, Office of BES, U.S. DOE (C.D.) .

Keywords

2D crystal structures
Superconductivity and magnetism
Thallium copper chalcogenides

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10.1016/j.physc.2016.10.005

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title = "Multi-layered Chalcogenides with potential for magnetism and superconductivity",

abstract = "Layered thallium copper chalcogenides can form single, double, or triple layers of Cu–Ch separated by Tl sheets. Here we report on the preparation and properties of Tl-based materials of TlCu2Se2, TlCu4S3, TlCu4Se3 and TlCu6S4. Having no long-range magnetism for these materials is quite surprising considering the possibilities of inter- and intra-layer exchange interactions through Cu 3d, and we measure by magnetic susceptibility and confirm by neutron diffraction. First principles density-functional theory calculations for both the single-layer TlCu2Se2 (isostructural to the {\textquoteleft}122{\textquoteright} iron-based superconductors) and the double-layer TlCu4Se3 suggest a lack of Fermi-level spectral weight that is needed to drive a magnetic or superconducting instability. However, for multiple structural layers with Fe, there is much greater likelihood for magnetism and superconductivity.",

keywords = "2D crystal structures, Superconductivity and magnetism, Thallium copper chalcogenides",

author = "Li Li and Parker, {David S.} and {dela Cruz}, {Clarina R.} and Sefat, {Athena S.}",

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T1 - Multi-layered Chalcogenides with potential for magnetism and superconductivity

AU - Li, Li

AU - Parker, David S.

AU - dela Cruz, Clarina R.

AU - Sefat, Athena S.

PY - 2016/12/15

Y1 - 2016/12/15

N2 - Layered thallium copper chalcogenides can form single, double, or triple layers of Cu–Ch separated by Tl sheets. Here we report on the preparation and properties of Tl-based materials of TlCu2Se2, TlCu4S3, TlCu4Se3 and TlCu6S4. Having no long-range magnetism for these materials is quite surprising considering the possibilities of inter- and intra-layer exchange interactions through Cu 3d, and we measure by magnetic susceptibility and confirm by neutron diffraction. First principles density-functional theory calculations for both the single-layer TlCu2Se2 (isostructural to the ‘122’ iron-based superconductors) and the double-layer TlCu4Se3 suggest a lack of Fermi-level spectral weight that is needed to drive a magnetic or superconducting instability. However, for multiple structural layers with Fe, there is much greater likelihood for magnetism and superconductivity.

AB - Layered thallium copper chalcogenides can form single, double, or triple layers of Cu–Ch separated by Tl sheets. Here we report on the preparation and properties of Tl-based materials of TlCu2Se2, TlCu4S3, TlCu4Se3 and TlCu6S4. Having no long-range magnetism for these materials is quite surprising considering the possibilities of inter- and intra-layer exchange interactions through Cu 3d, and we measure by magnetic susceptibility and confirm by neutron diffraction. First principles density-functional theory calculations for both the single-layer TlCu2Se2 (isostructural to the ‘122’ iron-based superconductors) and the double-layer TlCu4Se3 suggest a lack of Fermi-level spectral weight that is needed to drive a magnetic or superconducting instability. However, for multiple structural layers with Fe, there is much greater likelihood for magnetism and superconductivity.

KW - 2D crystal structures

KW - Superconductivity and magnetism

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JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

ER -

Multi-layered Chalcogenides with potential for magnetism and superconductivity

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Keywords

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