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

Nakano, K. and Yajima, T. and Takeiri, F. and Green, M.A. and Hester, J. and Kobayashi, Y. and Kageyama, H. (2013) Tc enhancement by aliovalent anionic substitution in superconducting BaTi2(Sb1-xSnx)2O. Journal of the Physical Society of Japan, 82 (7). 0-0. ISSN 00319015 (ISSN). (doi:https://doi.org/10.7566/JPSJ.82.074707) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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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.

Item Type: Article
Additional information: Unmapped bibliographic data: C7 - 074707 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - J. Phys. Soc. Jpn. [Field not mapped to EPrints] AD - Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan [Field not mapped to EPrints] AD - NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899-6100, United States [Field not mapped to EPrints] AD - Bragg Institute, Australian Nuclear Science and Technology Organisation, PMB 1, Menai, NSW 2234, Australia [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: BaTi2Pn2O, CDW/SDW instability, D1 square lattice, Hole doping, Mixed anionic coordination, Superconductivity
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 14 Oct 2015 11:16 UTC
Last Modified: 14 Oct 2015 11:16 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50959 (The current URI for this page, for reference purposes)
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