Tc enhancement by aliovalent anionic substitution in superconducting BaTi2(Sb1-xSnx)2O

Kousuke Nakano; Takeshi Yajima; Fumitaka Takeiri; Mark A. Green; James Hester; Yoji Kobayashi; Hiroshi Kageyama

doi:10.7566/JPSJ.82.074707

Tc enhancement by aliovalent anionic substitution in superconducting BaTi2(Sb1-xSnx)2O

Kousuke Nakano, Takeshi Yajima, Fumitaka Takeiri, Mark A. Green, James Hester, Yoji Kobayashi, Hiroshi Kageyama

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

18 Scopus citations

Abstract

BaTi2Sb2O is a Tc = 1.2K superconductor with a d1 square lattice, and isovalent Bi substitution for Sb can increase its Tc to 4.6K (BaTi2Bi2O), accompanied by the complete suppression of charge density wave (CDW) or spin density wave (SDW) transition. In the present study, we demonstrate that aliovalent Sn substitution (hole doping) also increases Tc up to 2.5K for BaTi2(Sb 0.7Sn0.3)2O, while suppressing CDW/SDW transition only slightly. The overall electronic phase diagram of BaTi2(Sb,Sn) 2O is qualitatively similar to that of cation-substituted (hole-doped) (Ba,Na)Ti2Sb2O, but quantitative differences such as in Tc are observed, which is discussed in terms of Ti-Pn hybridization and chemical disorder. © 2013 The Physical Society of Japan.

Original language	English (US)
Journal	Journal of the Physical Society of Japan
Volume	82
Issue number	7
DOIs	https://doi.org/10.7566/JPSJ.82.074707
State	Published - Jul 1 2013
Externally published	Yes

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Generated from Scopus record by KAUST IRTS on 2022-09-13

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Tc enhancement by aliovalent anionic substitution in superconducting BaTi2(Sb1-xSnx)2O",

abstract = "BaTi2Sb2O is a Tc = 1.2K superconductor with a d1 square lattice, and isovalent Bi substitution for Sb can increase its Tc to 4.6K (BaTi2Bi2O), accompanied by the complete suppression of charge density wave (CDW) or spin density wave (SDW) transition. In the present study, we demonstrate that aliovalent Sn substitution (hole doping) also increases Tc up to 2.5K for BaTi2(Sb 0.7Sn0.3)2O, while suppressing CDW/SDW transition only slightly. The overall electronic phase diagram of BaTi2(Sb,Sn) 2O is qualitatively similar to that of cation-substituted (hole-doped) (Ba,Na)Ti2Sb2O, but quantitative differences such as in Tc are observed, which is discussed in terms of Ti-Pn hybridization and chemical disorder. {\textcopyright} 2013 The Physical Society of Japan.",

author = "Kousuke Nakano and Takeshi Yajima and Fumitaka Takeiri and Green, {Mark A.} and James Hester and Yoji Kobayashi and Hiroshi Kageyama",

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T1 - Tc enhancement by aliovalent anionic substitution in superconducting BaTi2(Sb1-xSnx)2O

AU - Nakano, Kousuke

AU - Yajima, Takeshi

AU - Takeiri, Fumitaka

AU - Green, Mark A.

AU - Hester, James

AU - Kobayashi, Yoji

AU - Kageyama, Hiroshi

N1 - Generated from Scopus record by KAUST IRTS on 2022-09-13

PY - 2013/7/1

Y1 - 2013/7/1

N2 - BaTi2Sb2O is a Tc = 1.2K superconductor with a d1 square lattice, and isovalent Bi substitution for Sb can increase its Tc to 4.6K (BaTi2Bi2O), accompanied by the complete suppression of charge density wave (CDW) or spin density wave (SDW) transition. In the present study, we demonstrate that aliovalent Sn substitution (hole doping) also increases Tc up to 2.5K for BaTi2(Sb 0.7Sn0.3)2O, while suppressing CDW/SDW transition only slightly. The overall electronic phase diagram of BaTi2(Sb,Sn) 2O is qualitatively similar to that of cation-substituted (hole-doped) (Ba,Na)Ti2Sb2O, but quantitative differences such as in Tc are observed, which is discussed in terms of Ti-Pn hybridization and chemical disorder. © 2013 The Physical Society of Japan.

AB - BaTi2Sb2O is a Tc = 1.2K superconductor with a d1 square lattice, and isovalent Bi substitution for Sb can increase its Tc to 4.6K (BaTi2Bi2O), accompanied by the complete suppression of charge density wave (CDW) or spin density wave (SDW) transition. In the present study, we demonstrate that aliovalent Sn substitution (hole doping) also increases Tc up to 2.5K for BaTi2(Sb 0.7Sn0.3)2O, while suppressing CDW/SDW transition only slightly. The overall electronic phase diagram of BaTi2(Sb,Sn) 2O is qualitatively similar to that of cation-substituted (hole-doped) (Ba,Na)Ti2Sb2O, but quantitative differences such as in Tc are observed, which is discussed in terms of Ti-Pn hybridization and chemical disorder. © 2013 The Physical Society of Japan.

UR - http://journals.jps.jp/doi/10.7566/JPSJ.82.074707

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U2 - 10.7566/JPSJ.82.074707

DO - 10.7566/JPSJ.82.074707

M3 - Article

SN - 0031-9015

VL - 82

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 7

ER -

Tc enhancement by aliovalent anionic substitution in superconducting BaTi2(Sb1-xSnx)2O

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