Thermopower and thermal conductivity in the Weyl semimetal NbP

Stockert, U.; dos Reis, R. D.; Ajeesh, M. O.; Watzman, S. J.; Schmidt, M.; Shekhar, C.; Heremans, J. P.; Felser, C.; Baenitz, M.; Nicklas, M.

doi:10.1088/1361-648X/aa7a3b

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Thermopower and thermal conductivity in the Weyl semimetal NbP

MPS-Authors

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Stockert, U.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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dos Reis, R. D.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Ajeesh, M. O.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126835

Schmidt, M.
Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126847

Shekhar, C.
Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126601

Felser, C.
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126528

Baenitz, M.
Michael Baenitz, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126782

Nicklas, M.
Michael Nicklas, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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引用

Stockert, U., dos Reis, R. D., Ajeesh, M. O., Watzman, S. J., Schmidt, M., Shekhar, C., Heremans, J. P., Felser, C., Baenitz, M., & Nicklas, M. (2017). Thermopower and thermal conductivity in the Weyl semimetal NbP. Journal of Physics: Condensed Matter, 29(32):, pp. 1-6. doi:10.1088/1361-648X/aa7a3b.

引用: https://hdl.handle.net/11858/00-001M-0000-002D-B02A-0

要旨

The Weyl semimetal NbP exhibits an extremely large magnetoresistance and an ultra-high mobility. The large magnetoresistance originates from a combination of the nearly perfect compensation between electron-and hole-type charge carriers and the high mobility, which is relevant to the topological band structure. In this work we report on temperature-and fielddependent thermopower and thermal conductivity experiments on NbP. Additionally, we carried out complementary heat capacity, magnetization, and electrical resistivity measurements. We found a giant adiabatic magnetothermopower with a maximum of 800 mu V K-1 at 50 K in a field of 9 T. Such large effects have been observed rarely in bulk materials. We further observe pronounced quantum oscillations in both thermal conductivity and thermopower. The obtained frequencies compare well with our heat capacity and magnetization data.