Magnetic field induced modulation of heat transport in CrPS4 probed by TaIrTe4 transverse Seebeck thermometry
Abstract
Understanding and controlling heat flow in low-dimensional magnetic materials is central to thermoelectrics and spin caloritronics. One of the challenges is the absence of sensitive probes of small, field-dependent modulations in thermal transport. Here we demonstrate transverse Seebeck thermometry using exfoliated TaIrTe4 as a probe of thermal conductivity modulated by an external magnetic field on a van der Waals magnet, CrPS4. With a temperature gradient oriented at 45∘ to its principal crystallographic axes, TaIrTe4 exhibits a transverse thermopower exceeding 200 μV K−1 for 900 nm wide and 30 μm long electrodes, enabling precise detection of variations in the local temperature gradients. Exploiting this with CrPS4 in a nonlocal geometry, we resolve distinct field dependent thermal conductivity changes associated with both the spin-flip and spin-flop magnetic transitions which we attribute to variations in the magnon−phonon coupling in CrPS4. At 5 K, the transverse Seebeck response is modulated by more than 8% by an external magnetic field, demonstrating strong magnetic control of heat transport in CrPS4. This all van der Waals platform offers high sensitivity to modulations of thermal conductivity and a broad adaptability to a wide range of exfoliated magnetic systems.
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BibTeX
@misc{sundararajan2026magnetic,
title = {{Magnetic field induced modulation of heat transport in CrPS$_4$ probed by TaIrTe$_4$ transverse Seebeck thermometry}},
author = {Krishnaraajan Sundararajan and Sergio Alvarruiz and Cédric A. Cordero-Silis and Majid Ahmadi and Marcos H. D. Guimarães and Jagoda Slawinska and Joseph Barker and Bart J. van Wees},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.19833},
eprint = {2610.19833},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.19833},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Magnetic field induced modulation of heat transport in CrPS_4 probed by TaIrTe_4 transverse Seebeck thermometry
AU - Krishnaraajan Sundararajan
AU - Sergio Alvarruiz
AU - Cédric A. Cordero-Silis
AU - Majid Ahmadi
AU - Marcos H. D. Guimarães
AU - Jagoda Slawinska
AU - Joseph Barker
AU - Bart J. van Wees
PY - 2026
DA - 2026/10/16
PB - arXiv
DO - 10.48550/arxiv.2610.19833
UR - https://arxiv.org/abs/2610.19833
AB - Understanding and controlling heat flow in low-dimensional magnetic materials is central to thermoelectrics and spin caloritronics. One of the challenges is the absence of sensitive probes of small, field-dependent modulations in thermal transport. Here we demonstrate transverse Seebeck thermometry using exfoliated TaIrTe_4 as a probe of thermal conductivity modulated by an external magnetic field on a van der Waals magnet, CrPS_4. With a temperature gradient oriented at 45^∘ to its principal crystallographic axes, TaIrTe_4 exhibits a transverse thermopower exceeding 200 μV K^−1 for 900 nm wide and 30 μm long electrodes, enabling precise detection of variations in the local temperature gradients. Exploiting this with CrPS_4 in a nonlocal geometry, we resolve distinct field dependent thermal conductivity changes associated with both the spin-flip and spin-flop magnetic transitions which we attribute to variations in the magnon−phonon coupling in CrPS_4. At 5 K, the transverse Seebeck response is modulated by more than 8% by an external magnetic field, demonstrating strong magnetic control of heat transport in CrPS_4. This all van der Waals platform offers high sensitivity to modulations of thermal conductivity and a broad adaptability to a wide range of exfoliated magnetic systems.
ER -