Magneto-transport and electronic structure studies of ternary antimonides, LaTSb2 (T = Cu, Ag)
Abstract
We investigate Sb square net-based Dirac semimetallic ternary antimonides LaTSb2 (T = Cu, Ag) using magnetotransport and photoelectron spectroscopic studies, complemented by density functional theory (DFT) based ab initio calculations. Our results show that both compounds exhibit a positive temperature coefficient of resistivity, linear magnetoresistance (MR), and a deviation from Fermi liquid behaviour at low temperatures (2-30 K). But only T = Ag compound exhibit signature of charge density wave (CDW) phenomena and the results of its temperature dependent MR data suggest that single-band semiclassical transport is not sufficient to understand the transport behaviour. DFT+U studies show that in both samples, an on-site Coulomb interaction (U) for Cu 3d and Ag 4d electrons, in the presence of spin-orbit coupling (SOC) is required to reproduce experimental valence band spectra. Sb 3d, 4d core-level spectra combined with DFT+U calculations and La 3d spectra confirm the presence and effects of inequivalent Sb sites for both the samples. In contrast to the T = Cu compound, which follows expected temperature-dependent core-level sharpening, the T = Ag compound exhibits an anomalous low-temperature broadening in the CDW phase. The analysis of Sb 3d spectra suggests Sb square nets are linked to CDW phenomena in the T = Ag compound. Temperature-dependent ultraviolet photoemission spectroscopic studies on T = Ag show a small decrement in spectral DOS at the εF for the temperature below the CDW transition temperature. These core-level studies provide a valuable spectroscopic benchmark for comparing CDW and non-CDW systems and clarifying the role of local electronic environments in CDW formation.
Related
- Diffusion model for fast alpha-particle transport in Magneto-Inertial Fusion plasmas
- Investigation of Hopping Conduction and Its Impact on the Subthreshold and Transition Region Transport in Oxide Semiconductor Transistors by Magneto-Transport Measurements
- Dual Charge-Density-Waves in Two-dimensional DyTe3 and Their Distinct Impacts on Magneto-Transport Properties
- Electronic transport in hBN-encapsulated graphene limited by remote phonon scattering
- The effects of non-stoichiometric lattice structure and secondary phase α-Fe2O3 on modifying the magnetic, electrical, and magneto-electric properties of Eu doped BaFe12O19 hexaferrite
BibTeX
@misc{pant2026magnetotransport,
title = {{Magneto-transport and electronic structure studies of ternary antimonides, La$T$Sb$_2$ ($T$ = Cu, Ag)}},
author = {Himanshu Pant and Neeraj Bhatt and Deepali Sharma and Asif Ali and A. Thamizhavel and Saurabh Singh and Kentaro Kuga and Tsunehiro Takeuchi and Ravi Shankar Singh and R. Bindu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.04290},
eprint = {2610.04290},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.04290},
}
RIS
TY - UNPB
TI - Magneto-transport and electronic structure studies of ternary antimonides, LaTSb_2 (T = Cu, Ag)
AU - Himanshu Pant
AU - Neeraj Bhatt
AU - Deepali Sharma
AU - Asif Ali
AU - A. Thamizhavel
AU - Saurabh Singh
AU - Kentaro Kuga
AU - Tsunehiro Takeuchi
AU - Ravi Shankar Singh
AU - R. Bindu
PY - 2026
DA - 2026/10/03
PB - arXiv
DO - 10.48550/arxiv.2610.04290
UR - https://arxiv.org/abs/2610.04290
AB - We investigate Sb square net-based Dirac semimetallic ternary antimonides LaTSb_2 (T = Cu, Ag) using magnetotransport and photoelectron spectroscopic studies, complemented by density functional theory (DFT) based ab initio calculations. Our results show that both compounds exhibit a positive temperature coefficient of resistivity, linear magnetoresistance (MR), and a deviation from Fermi liquid behaviour at low temperatures (2-30 K). But only T = Ag compound exhibit signature of charge density wave (CDW) phenomena and the results of its temperature dependent MR data suggest that single-band semiclassical transport is not sufficient to understand the transport behaviour. DFT+U studies show that in both samples, an on-site Coulomb interaction (U) for Cu 3d and Ag 4d electrons, in the presence of spin-orbit coupling (SOC) is required to reproduce experimental valence band spectra. Sb 3d, 4d core-level spectra combined with DFT+U calculations and La 3d spectra confirm the presence and effects of inequivalent Sb sites for both the samples. In contrast to the T = Cu compound, which follows expected temperature-dependent core-level sharpening, the T = Ag compound exhibits an anomalous low-temperature broadening in the CDW phase. The analysis of Sb 3d spectra suggests Sb square nets are linked to CDW phenomena in the T = Ag compound. Temperature-dependent ultraviolet photoemission spectroscopic studies on T = Ag show a small decrement in spectral DOS at the ε_F for the temperature below the CDW transition temperature. These core-level studies provide a valuable spectroscopic benchmark for comparing CDW and non-CDW systems and clarifying the role of local electronic environments in CDW formation.
ER -