Orbital-dependent charge dynamics in MnP revealed by optical study
arXiv:1607.02853 · doi:10.1038/s41598-017-14648-7
Abstract
Unconventional superconductivity often emerges at the border of long-range magnetic orders. Understanding the low-energy charge dynamics may provide crucial information on the formation of superconductivity. Here we report the unpolarized/polarized optical conductivity study of high quality MnP single crystals at ambient pressure. Our data reveal two types of charge carriers with very different lifetimes. In combination with the first-principles calculations, we show that the short-lifetime carriers have flat Fermi sheets which become gapped in the helimagnetic phase, causing a dramatic change in the low-frequency optical spectra, while the long-lifetime carriers are anisotropic three-dimensional like which are little affected by the magnetic transitions and provide major contributions to the transport properties. This orbital-dependent charge dynamics originates from the special crystal structure of MnP and may have an influence on the unconventional superconductivity and its interplay with helimagnetism at high pressures.
10 pages, 7 figures
References in corpus (8)
- Superconductivity in the vicinity of antiferromagnetic order in CrAs
- Pressure induced superconductivity on the border of magnetic order in MnP
- Superconductivity of 2.2 K under Pressure in Helimagnet CrAs
- Structurally driven metamagnetism in MnP and related Pnma compounds
- Pressure dependence of the magnetic ground states in MnP
- Magnetic Pitch as a Tuning Fork for Superconductivity
- High pressure magnetic state of MnP probed by means of muon-spin rotation
- First-principles investigation of MnP magnetic states precursors of superconductivity under high pressure