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Observation of metal to nonmagnetic insulator transition in polycrystalline RuP by photoemission spectroscopy
- Publication Year :
- 2020
- Publisher :
- AMER PHYSICAL SOC, 2020.
-
Abstract
- We investigate the metal to nonmagnetic insulator (MI) transition of MnP-type Ru pnictide RuP using hard x-ray and ultraviolet photoemission spectroscopies. The spectral weight at ${E}_{\mathrm{F}}$ is suppressed below the MI transition temperature ${T}_{\mathrm{MI}}$, while there is no appreciable change across the pseudogap temperature ${T}_{\mathrm{PG}}$. The estimated energy scale of the gap is $\ensuremath{\sim}110$ meV, which is in good correspondence to the spin gap opening observed in the previous NMR study. According to the band structure calculation, the density of states at ${E}_{\mathrm{F}}$ mainly originates from narrow bands of the Ru $4{d}_{xy}$ orbitals. Our results suggest that the fourfold-degenerate Ru $4{d}_{xy}$ orbitals are deeply related to the MI transition. Based on the photoemission results and the band structure calculation, we argue the possible origin of the MI transition for polycrystalline RuP.
- Subjects :
- Physics
RuP
Condensed matter physics
4d metals, RuP, MT transition, Pnictides
Photoemission spectroscopy
Transition temperature
MT transition
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
4d metals
Atomic orbital
Pnictides
0103 physical sciences
Density of states
Condensed Matter::Strongly Correlated Electrons
Crystallite
010306 general physics
0210 nano-technology
Pseudogap
Electronic band structure
Pnictogen
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....413568031f4eff1fbfb070288e7202ce