Transport anomalies in the layered compound BaPt4Se6
Abstract
We report a layered ternary selenide BaPt4Se6featuring sesqui-selenide Pt2Se3layers sandwiched by Ba atoms. The Pt2Se3layers in this compound can be derived from the Dirac-semimetal PtSe2phase with Se vacancies that form a honeycomb structure. This structure results in a Pt (VI) and Pt (II) mixed-valence compound with both PtSe6octahedra and PtSe4square net coordination configurations. Temperature-dependent electrical transport measurements suggest two distinct anomalies: a resistivity crossover, mimic to the metal-insulator (M-I) transition at ~150 K, and a resistivity plateau at temperatures below 10 K. The resistivity crossover is not associated with any structural, magnetic, or charge order modulated phase transitions. Magnetoresistivity, Hall, and heat capacity measurements concurrently suggest an existing hidden state below 5 K in this system. Angle-resolved photoemission spectroscopy measurements reveal a metallic state and no dramatic reconstruction of the electronic structure up to 200 K.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 23, 2021
- Source ID
- 10.1038/s41535-021-00382-x
Entities
People
- Bing Lv
- Daniel Peirano Petit
- Gang Li
- Gregory T. Mccandless
- Hanlin Wu
- Huifei Zhai
- Ji Seop Oh
- Jonathan D Denlinger
- Julia Y Chan
- Ming Yi
- Robert J. Birgeneau
- Sheng Li
- Wenhao Liu
- Yichen Zhang
Organizations
- Air Force Office of Scientific Research
- Gordon and Betty Moore Foundation
- National Science Foundation