Tunability of the structural and magnetic transition in kagome material: PrIr3B2
Abstract
We report the temperature and pressure tunability of an unusual structural transformation associated with a two-step metal-insulator-metal (MIM) transition in the kagome lattice compound PrIr3B2 using synchrotron X-ray powder diffraction. At ambient conditions of temperature and pressure, the monoclinic (C2/m) and the hexagonal (P6/mmm) phases coexist as twinned structure in the crystal. As the temperature (pressure) is decreased (increased), PrIr3B2 converts fully to monoclinic structure at T = 280 K (at ambient pressure) and P = 1.2 GPa (at room temperature). Temperature dependence of the monoclinic structure at ambient pressure presents complex evolution of lattice parameters with weak but clearly discernable anomalies at \SI{\sim 250} {\K} and \SI{\sim 110} {\K}, which are correlated with the second MIM transition and the linear to nonlinear temperature-dependent resistivity crossover, respectively. These anomalies are likely due to some charge order state causing a partially gapped Fermi surface. The magnetic phase diagram of PrIr3B2 is also investigated from anisotropic measurements. At 10 K, a superzone gap opens near the antiferromagnetic transition, which does not close even in the polarized state. From the tunability of the crystal structure and magnetic and electronic ground state, promising electronic orders are indicated in this kagome metallic magnet.
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BibTeX
@misc{gayathri2026tunability,
title = {{Tunability of the structural and magnetic transition in kagome material: PrIr$_3$B$_2$}},
author = {Gayathri V and Irshad K A and Sathishkumar M and Boby Joseph and S. Manni},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.39175},
eprint = {2609.39175},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.39175},
}
RIS
TY - UNPB
TI - Tunability of the structural and magnetic transition in kagome material: PrIr_3B_2
AU - Gayathri V
AU - Irshad K A
AU - Sathishkumar M
AU - Boby Joseph
AU - S. Manni
PY - 2026
DA - 2026/09/30
PB - arXiv
DO - 10.48550/arxiv.2609.39175
UR - https://arxiv.org/abs/2609.39175
AB - We report the temperature and pressure tunability of an unusual structural transformation associated with a two-step metal-insulator-metal (MIM) transition in the kagome lattice compound PrIr_3B_2 using synchrotron X-ray powder diffraction. At ambient conditions of temperature and pressure, the monoclinic (C2/m) and the hexagonal (P6/mmm) phases coexist as twinned structure in the crystal. As the temperature (pressure) is decreased (increased), PrIr_3B_2 converts fully to monoclinic structure at T = 280 K (at ambient pressure) and P = 1.2 GPa (at room temperature). Temperature dependence of the monoclinic structure at ambient pressure presents complex evolution of lattice parameters with weak but clearly discernable anomalies at \SI{\sim 250} {\K} and \SI{\sim 110} {\K}, which are correlated with the second MIM transition and the linear to nonlinear temperature-dependent resistivity crossover, respectively. These anomalies are likely due to some charge order state causing a partially gapped Fermi surface. The magnetic phase diagram of PrIr_3B_2 is also investigated from anisotropic measurements. At 10 K, a superzone gap opens near the antiferromagnetic transition, which does not close even in the polarized state. From the tunability of the crystal structure and magnetic and electronic ground state, promising electronic orders are indicated in this kagome metallic magnet.
ER -