Multiple electronic transitions and superconductivity in Pdx TiSe2

E. Morosan; K. E. Wagner; Liang L. Zhao; Y. Hor; A. J. Williams; J. Tao; Y. Zhu; R. J. Cava

doi:10.1103/PhysRevB.81.094524

Multiple electronic transitions and superconductivity in Pd_x TiSe₂

E. Morosan, K. E. Wagner, Liang L. Zhao, Y. Hor, A. J. Williams, J. Tao, Y. Zhu, R. J. Cava

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Abstract

We report the synthesis and characterization of Pd_x TiSe ₂ via magnetization, resistivity, specific heat measurements, and low-temperature electron diffraction. At very low levels of intercalation, near Pd_0.01 TiSe₂, the commensurate charge density wave transition in the TiSe₂ parent compound near 220 K becomes substantially stronger; a distinct transition to a more resistive state is seen at about 80 K. Originally semimetallic, TiSe₂ becomes an insulator at low temperatures for 0.01≤x≤0.06 in Pd_x TiSe₂. Increasing Pd intercalation beyond this level begins to suppress the insulating behavior until a 2 K superconductor is found in the narrow composition range of 0.11≤x≤0.12. Beyond x=0.12, a normal metallic state (down to 0.3 K) is induced.

Original language	English (US)
Article number	094524
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.81.094524
State	Published - Mar 26 2010

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.81.094524

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title = "Multiple electronic transitions and superconductivity in Pdx TiSe2",

abstract = "We report the synthesis and characterization of Pdx TiSe 2 via magnetization, resistivity, specific heat measurements, and low-temperature electron diffraction. At very low levels of intercalation, near Pd0.01 TiSe2, the commensurate charge density wave transition in the TiSe2 parent compound near 220 K becomes substantially stronger; a distinct transition to a more resistive state is seen at about 80 K. Originally semimetallic, TiSe2 becomes an insulator at low temperatures for 0.01≤x≤0.06 in Pdx TiSe2. Increasing Pd intercalation beyond this level begins to suppress the insulating behavior until a 2 K superconductor is found in the narrow composition range of 0.11≤x≤0.12. Beyond x=0.12, a normal metallic state (down to 0.3 K) is induced.",

author = "E. Morosan and Wagner, {K. E.} and Zhao, {Liang L.} and Y. Hor and Williams, {A. J.} and J. Tao and Y. Zhu and Cava, {R. J.}",

note = "Funding Information: I thank Nick Goldman, Adrian Friday and Sudhir Kumar for many useful comments on different versions of the program package. I thank Tianlin Wang for the eigen routine used in the package. I also thank a number of users who have reported bugs and made suggestions. Development of the program package has been supported by a grant from the National Science Foundation of China to Z. Y., by NSF and NIH grants to M.Nei, and by an N1H grant to M.Slatkin.",

year = "2010",

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doi = "10.1103/PhysRevB.81.094524",

language = "English (US)",

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T1 - Multiple electronic transitions and superconductivity in Pdx TiSe2

AU - Morosan, E.

AU - Wagner, K. E.

AU - Zhao, Liang L.

AU - Hor, Y.

AU - Williams, A. J.

AU - Tao, J.

AU - Zhu, Y.

AU - Cava, R. J.

N1 - Funding Information: I thank Nick Goldman, Adrian Friday and Sudhir Kumar for many useful comments on different versions of the program package. I thank Tianlin Wang for the eigen routine used in the package. I also thank a number of users who have reported bugs and made suggestions. Development of the program package has been supported by a grant from the National Science Foundation of China to Z. Y., by NSF and NIH grants to M.Nei, and by an N1H grant to M.Slatkin.

PY - 2010/3/26

Y1 - 2010/3/26

N2 - We report the synthesis and characterization of Pdx TiSe 2 via magnetization, resistivity, specific heat measurements, and low-temperature electron diffraction. At very low levels of intercalation, near Pd0.01 TiSe2, the commensurate charge density wave transition in the TiSe2 parent compound near 220 K becomes substantially stronger; a distinct transition to a more resistive state is seen at about 80 K. Originally semimetallic, TiSe2 becomes an insulator at low temperatures for 0.01≤x≤0.06 in Pdx TiSe2. Increasing Pd intercalation beyond this level begins to suppress the insulating behavior until a 2 K superconductor is found in the narrow composition range of 0.11≤x≤0.12. Beyond x=0.12, a normal metallic state (down to 0.3 K) is induced.

AB - We report the synthesis and characterization of Pdx TiSe 2 via magnetization, resistivity, specific heat measurements, and low-temperature electron diffraction. At very low levels of intercalation, near Pd0.01 TiSe2, the commensurate charge density wave transition in the TiSe2 parent compound near 220 K becomes substantially stronger; a distinct transition to a more resistive state is seen at about 80 K. Originally semimetallic, TiSe2 becomes an insulator at low temperatures for 0.01≤x≤0.06 in Pdx TiSe2. Increasing Pd intercalation beyond this level begins to suppress the insulating behavior until a 2 K superconductor is found in the narrow composition range of 0.11≤x≤0.12. Beyond x=0.12, a normal metallic state (down to 0.3 K) is induced.

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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Multiple electronic transitions and superconductivity in Pd_x TiSe₂

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