A new quasi-one-dimensional compound Ba3TiTe5 and superconductivity induced by pressure

Zhang，Jun1,2,3; Jia，Yating1,2; Wang，Xiancheng1; Li，Zhi4; Duan，Lei1,2; Li，Wenmin1,2; Zhao，Jianfa1,2; Cao，Lipeng1; Dai，Guangyang1,2; Deng，Zheng1; Zhang，Sijia1; Feng，Shaomin1; Yu，Runze1; Liu，Qingqing1; Hu，Jiangping1,2; Zhu，Jinlong3,5; Jin，Changqing1,2,6

2019-12-01

10.1038/s41427-019-0158-2

NPG Asia Materials   影响因子和分区

1884-4049

1884-4057

We report systematic studies of a new quasi-one-dimensional (quasi-1D) compound, BaTiTe, and the high-pressure induced superconductivity therein. BaTiTe was synthesized at high pressure and high temperature. It crystallizes into a hexagonal structure (P6/mcm), which consists of infinite face-sharing octahedral TiTe chains and Te chains along the c axis, exhibiting a strong 1D characteristic structure. The first-principles calculations demonstrate that BaTiTe is a well-defined 1D conductor; thus, it can be considered a starting point to explore the exotic physics induced by pressure by enhancing the interchain hopping to move the 1D conductor to a high-dimensional metal. For BaTiTe, high-pressure techniques were employed to study the emerging physics dependent on interchain hopping, such as the Umklapp scattering effect, spin/charge density wave (SDW/CDW), superconductivity and non-Fermi liquid behavior. Finally, a complete phase diagram was plotted. The superconductivity emerges at 8.8 GPa, near which the Umklapp gap is mostly suppressed. T is enhanced and reaches a maximum of ~6 K at ~36.7 GPa, where the SDW/CDW is completely suppressed, and a non-Fermi liquid behavior appears. Our results suggest that the appearance of superconductivity is associated with the fluctuation due to the suppression of the Umklapp gap and that the enhancement of the T is related to the fluctuation of the SDW/CDW.

SCI ; EI

英语

通讯

National Natural Science Foundation of China[U1530402]

Materials Science

Materials Science, Multidisciplinary

WOS:000493196900001

NATURE PUBLISHING GROUP

20194407605279

Barium compounds ; Calculations ; Fermi liquids ; Fermions ; High pressure effects ; Magnetic anisotropy ; Technetium

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Mathematics:921 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Atomic and Molecular Physics:931.3

2-s2.0-85074076965

Scopus

1.Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of Sciences,Beijing,100190,China
2.School of PhysicsUniversity of Chinese Academy of Sciences,Beijing,100190,China
3.Center for High Pressure Science & Technology Advanced Research,Beijing,100094,China
4.College of Materials Science and EngineeringNanjing University of Science and Technology,Nanjing,210094,China
5.Physics DepartmentSouthern University of Science and Technology,Shenzhen,518055,China
6.Materials Research Lab at Songshan Lake,Dongguan,523808,China

Zhang，Jun,Jia，Yating,Wang，Xiancheng,et al. A new quasi-one-dimensional compound Ba3TiTe5 and superconductivity induced by pressure[J]. NPG Asia Materials,2019,11(1).

Zhang，Jun.,Jia，Yating.,Wang，Xiancheng.,Li，Zhi.,Duan，Lei.,...&Jin，Changqing.(2019).A new quasi-one-dimensional compound Ba3TiTe5 and superconductivity induced by pressure.NPG Asia Materials,11(1).

Zhang，Jun,et al."A new quasi-one-dimensional compound Ba3TiTe5 and superconductivity induced by pressure".NPG Asia Materials 11.1(2019).