Polytypism and superconductivity in the NbSe2–TiSe2 solid solution

Danrui Ni; Claire Peng; Guangming Cheng; Stephen Zhang; Teresa Lee; Nan Yao; Robert J. Cava

doi:10.1039/d5tc04472c

Polytypism and superconductivity in the NbSe₂–TiSe₂ solid solution

Danrui Ni
, Claire Peng
, Guangming Cheng
, Stephen Zhang
, Teresa Lee
, Nan Yao
, Robert J. Cava

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

Abstract

The metals are in trigonal prismatic and octahedral coordination in NbSe₂ and TiSe₂, respectively, and Ti and Nb are known to mix randomly in some cases, and here we report that the Nb_1−xTi_xSe₂ solid solution with 0 ≤ x ≤ 1 was synthesized via a solid state preparation method at 850 °C. Quench cooling was used. The polycrystalline powders obtained were characterized for their structural and superconducting properties. Single crystal diffraction on crystals taken from a material where x = 0.5 indicates that the formula is as expected and that Ti substitution is on the Nb site, instead of intercalation between the layers. HR-STEM data support our assignments of the polytypes present.

Original language	English (US)
Pages (from-to)	13007-13015
Number of pages	9
Journal	Journal of Materials Chemistry C
Volume	14
Issue number	29
DOIs	https://doi.org/10.1039/d5tc04472c
State	Published - Jul 30 2026

All Science Journal Classification (ASJC) codes

General Chemistry
Materials Chemistry

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10.1039/d5tc04472c

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title = "Polytypism and superconductivity in the NbSe2{\textendash}TiSe2 solid solution",

abstract = "The metals are in trigonal prismatic and octahedral coordination in NbSe2 and TiSe2, respectively, and Ti and Nb are known to mix randomly in some cases, and here we report that the Nb1−xTixSe2 solid solution with 0 ≤ x ≤ 1 was synthesized via a solid state preparation method at 850 °C. Quench cooling was used. The polycrystalline powders obtained were characterized for their structural and superconducting properties. Single crystal diffraction on crystals taken from a material where x = 0.5 indicates that the formula is as expected and that Ti substitution is on the Nb site, instead of intercalation between the layers. HR-STEM data support our assignments of the polytypes present.",

author = "Danrui Ni and Claire Peng and Guangming Cheng and Stephen Zhang and Teresa Lee and Nan Yao and Cava, \{Robert J.\}",

note = "Publisher Copyright: This journal is {\textcopyright} The Royal Society of Chemistry, 2026.",

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doi = "10.1039/d5tc04472c",

language = "English (US)",

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TY - JOUR

T1 - Polytypism and superconductivity in the NbSe2–TiSe2 solid solution

AU - Ni, Danrui

AU - Peng, Claire

AU - Cheng, Guangming

AU - Zhang, Stephen

AU - Lee, Teresa

AU - Yao, Nan

AU - Cava, Robert J.

PY - 2026/7/30

Y1 - 2026/7/30

N2 - The metals are in trigonal prismatic and octahedral coordination in NbSe2 and TiSe2, respectively, and Ti and Nb are known to mix randomly in some cases, and here we report that the Nb1−xTixSe2 solid solution with 0 ≤ x ≤ 1 was synthesized via a solid state preparation method at 850 °C. Quench cooling was used. The polycrystalline powders obtained were characterized for their structural and superconducting properties. Single crystal diffraction on crystals taken from a material where x = 0.5 indicates that the formula is as expected and that Ti substitution is on the Nb site, instead of intercalation between the layers. HR-STEM data support our assignments of the polytypes present.

AB - The metals are in trigonal prismatic and octahedral coordination in NbSe2 and TiSe2, respectively, and Ti and Nb are known to mix randomly in some cases, and here we report that the Nb1−xTixSe2 solid solution with 0 ≤ x ≤ 1 was synthesized via a solid state preparation method at 850 °C. Quench cooling was used. The polycrystalline powders obtained were characterized for their structural and superconducting properties. Single crystal diffraction on crystals taken from a material where x = 0.5 indicates that the formula is as expected and that Ti substitution is on the Nb site, instead of intercalation between the layers. HR-STEM data support our assignments of the polytypes present.

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U2 - 10.1039/d5tc04472c

DO - 10.1039/d5tc04472c

M3 - Article

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JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

IS - 29

ER -

Polytypism and superconductivity in the NbSe₂–TiSe₂ solid solution

Abstract

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