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arXiv · 2610.38506

Reciprocal transverse Seebeck and Peltier effects in MoSi2

Aina Sakamoto·Shoya Ohsumi·Shogo Yoshida·Ryuji Okazaki·Yoshiki J. Sato
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Abstract

Transverse thermoelectric conversion, in which charge and heat currents are interconverted in orthogonal directions, has recently attracted increasing attention as an alternative to conventional longitudinal thermoelectric conversion. Although transverse Seebeck effect has been investigated in various materials, its reciprocal process, transverse Peltier effect, remains much less explored, and direct comparison of the two effects in the same homogeneous material is still limited. Here, we experimentally investigate both transverse Seebeck and Peltier effects in a single crystal of MoSi2, an axis-dependent conduction polarity material in which the sign of the Seebeck coefficient varies depending on the crystallographic axis. Multi-terminal voltage measurement determines the direction of the induced internal electric field and establishes the transverse Seebeck response. We also directly visualize the transverse temperature modulation consistent with the corresponding transverse Peltier effect by using lock-in thermography under an applied ac current. These results establish reciprocal transverse thermoelectric conversion in a homogeneous nonmagnetic single crystal without engineered interfaces.

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Aina Sakamoto, Shoya Ohsumi, Shogo Yoshida, Ryuji Okazaki, Yoshiki J. Sato. 2026-10-28. Reciprocal transverse Seebeck and Peltier effects in MoSi2. https://arxiv.org/abs/2610.38506

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