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arXiv · 1310.0286

Manifestation of the spin textures in the thermopower of MnSi

Stevan Arsenijević·Cedomir Petrovic·László Forró·Ana Akrap
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Abstract

To identify possible spin texture contributions to thermoelectric transport, we present a detailed temperature and pressure dependence of thermopower $S$ in MnSi, as well as a low-temperature study of $S$ in a magnetic field. We find that $S/T$ reconstructs the $(p,T)$ phase diagram of MnSi encompassing the Fermi liquid, partially ordered, and non-Fermi liquid phases. Our results indicate that the latter two phases have essentially the same nature. In the partially ordered phase, $S(T)$ is strongly enhanced, which may be understood as a spiral-fluctuation-driven phase. A low temperature upturn in $S/T$ pertaining to the partial order phase persists up to the highest pressure, 24 kbar. Contrarily, a small suppression of $S(T)$ is observed in the ordered skyrmion lattice $A$ phase.

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Stevan Arsenijević, Cedomir Petrovic, László Forró, Ana Akrap. 2013-10-01. Manifestation of the spin textures in the thermopower of MnSi. https://doi.org/10.1209/0295-5075%2F103%2F57015

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