Emergence of superconductivity in (NH3)y MxMoSe2 (M

Li, Na and K)

Xiao Miao, Saki Nishiyama, Lu Zheng, Hidenori Goto, Ritsuko Eguchi, Hiromi Ota, Takashi Kambe, Kensei Terashima, Takayoshi Yokoya, Huyen T L Nguyen, Tomoko Kagayama, Naohisa Hirao, Yasuo Ohishi, Hirofumi Ishii, Yen Fa Liao, Yoshihiro Kubozono

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We report syntheses of new superconducting metal-doped MoSe2 materials (MxMoSe2). The superconducting MxMoSe2 samples were prepared using a liquid NH3 technique, and can be represented as '(NH3)yMxMoSe2'. The Tcs of these materials were approximately 5.0 K, independent of x and the specific metal atom. X-ray diffraction patterns of (NH3)yNaxMoSe2 were recorded using polycrystalline powders. An increase in lattice constant c showed that the Na atom was intercalated between MoSe2 layers. The x-independence of c was observed in (NH3)yNaxMoSe2, indicating the formation of a stoichiometric compound in the entire x range, which is consistent with the x-independence of Tc. A metallic edge of the Fermi level was observed in the photoemission spectrum at 30 K, demonstrating its metallic character in the normal state. Doping of MoSe2 with Li and K also yielded superconductivity. Thus, MoSe2 is a promising material for designing new superconductors, as are other transition metal dichalcogenides.

Original languageEnglish
Article number29292
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - Jul 11 2016

Fingerprint

superconductivity
metals
atoms
photoelectric emission
diffraction patterns
transition metals
synthesis
liquids
x rays

ASJC Scopus subject areas

  • General

Cite this

Emergence of superconductivity in (NH3)y MxMoSe2 (M : Li, Na and K). / Miao, Xiao; Nishiyama, Saki; Zheng, Lu; Goto, Hidenori; Eguchi, Ritsuko; Ota, Hiromi; Kambe, Takashi; Terashima, Kensei; Yokoya, Takayoshi; Nguyen, Huyen T L; Kagayama, Tomoko; Hirao, Naohisa; Ohishi, Yasuo; Ishii, Hirofumi; Liao, Yen Fa; Kubozono, Yoshihiro.

In: Scientific Reports, Vol. 6, 29292, 11.07.2016.

Research output: Contribution to journalArticle

Miao, Xiao ; Nishiyama, Saki ; Zheng, Lu ; Goto, Hidenori ; Eguchi, Ritsuko ; Ota, Hiromi ; Kambe, Takashi ; Terashima, Kensei ; Yokoya, Takayoshi ; Nguyen, Huyen T L ; Kagayama, Tomoko ; Hirao, Naohisa ; Ohishi, Yasuo ; Ishii, Hirofumi ; Liao, Yen Fa ; Kubozono, Yoshihiro. / Emergence of superconductivity in (NH3)y MxMoSe2 (M : Li, Na and K). In: Scientific Reports. 2016 ; Vol. 6.
@article{a37130cc7456486cb1da8f042ecc855d,
title = "Emergence of superconductivity in (NH3)y MxMoSe2 (M: Li, Na and K)",
abstract = "We report syntheses of new superconducting metal-doped MoSe2 materials (MxMoSe2). The superconducting MxMoSe2 samples were prepared using a liquid NH3 technique, and can be represented as '(NH3)yMxMoSe2'. The Tcs of these materials were approximately 5.0 K, independent of x and the specific metal atom. X-ray diffraction patterns of (NH3)yNaxMoSe2 were recorded using polycrystalline powders. An increase in lattice constant c showed that the Na atom was intercalated between MoSe2 layers. The x-independence of c was observed in (NH3)yNaxMoSe2, indicating the formation of a stoichiometric compound in the entire x range, which is consistent with the x-independence of Tc. A metallic edge of the Fermi level was observed in the photoemission spectrum at 30 K, demonstrating its metallic character in the normal state. Doping of MoSe2 with Li and K also yielded superconductivity. Thus, MoSe2 is a promising material for designing new superconductors, as are other transition metal dichalcogenides.",
author = "Xiao Miao and Saki Nishiyama and Lu Zheng and Hidenori Goto and Ritsuko Eguchi and Hiromi Ota and Takashi Kambe and Kensei Terashima and Takayoshi Yokoya and Nguyen, {Huyen T L} and Tomoko Kagayama and Naohisa Hirao and Yasuo Ohishi and Hirofumi Ishii and Liao, {Yen Fa} and Yoshihiro Kubozono",
year = "2016",
month = "7",
day = "11",
doi = "10.1038/srep29292",
language = "English",
volume = "6",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",

}

TY - JOUR

T1 - Emergence of superconductivity in (NH3)y MxMoSe2 (M

T2 - Li, Na and K)

AU - Miao, Xiao

AU - Nishiyama, Saki

AU - Zheng, Lu

AU - Goto, Hidenori

AU - Eguchi, Ritsuko

AU - Ota, Hiromi

AU - Kambe, Takashi

AU - Terashima, Kensei

AU - Yokoya, Takayoshi

AU - Nguyen, Huyen T L

AU - Kagayama, Tomoko

AU - Hirao, Naohisa

AU - Ohishi, Yasuo

AU - Ishii, Hirofumi

AU - Liao, Yen Fa

AU - Kubozono, Yoshihiro

PY - 2016/7/11

Y1 - 2016/7/11

N2 - We report syntheses of new superconducting metal-doped MoSe2 materials (MxMoSe2). The superconducting MxMoSe2 samples were prepared using a liquid NH3 technique, and can be represented as '(NH3)yMxMoSe2'. The Tcs of these materials were approximately 5.0 K, independent of x and the specific metal atom. X-ray diffraction patterns of (NH3)yNaxMoSe2 were recorded using polycrystalline powders. An increase in lattice constant c showed that the Na atom was intercalated between MoSe2 layers. The x-independence of c was observed in (NH3)yNaxMoSe2, indicating the formation of a stoichiometric compound in the entire x range, which is consistent with the x-independence of Tc. A metallic edge of the Fermi level was observed in the photoemission spectrum at 30 K, demonstrating its metallic character in the normal state. Doping of MoSe2 with Li and K also yielded superconductivity. Thus, MoSe2 is a promising material for designing new superconductors, as are other transition metal dichalcogenides.

AB - We report syntheses of new superconducting metal-doped MoSe2 materials (MxMoSe2). The superconducting MxMoSe2 samples were prepared using a liquid NH3 technique, and can be represented as '(NH3)yMxMoSe2'. The Tcs of these materials were approximately 5.0 K, independent of x and the specific metal atom. X-ray diffraction patterns of (NH3)yNaxMoSe2 were recorded using polycrystalline powders. An increase in lattice constant c showed that the Na atom was intercalated between MoSe2 layers. The x-independence of c was observed in (NH3)yNaxMoSe2, indicating the formation of a stoichiometric compound in the entire x range, which is consistent with the x-independence of Tc. A metallic edge of the Fermi level was observed in the photoemission spectrum at 30 K, demonstrating its metallic character in the normal state. Doping of MoSe2 with Li and K also yielded superconductivity. Thus, MoSe2 is a promising material for designing new superconductors, as are other transition metal dichalcogenides.

UR - http://www.scopus.com/inward/record.url?scp=84978406278&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84978406278&partnerID=8YFLogxK

U2 - 10.1038/srep29292

DO - 10.1038/srep29292

M3 - Article

VL - 6

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

M1 - 29292

ER -