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  Spin Nernst effect in a p-band semimetal InBi

Zhang, Y., Xu, Q., Koepernik, K., Fu, C., Gooth, J., van den Brink, J., et al. (2020). Spin Nernst effect in a p-band semimetal InBi. New Journal of Physics, 22(9): 093003, pp. 1-8. doi:10.1088/1367-2630/abaa87.

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 Creators:
Zhang, Yang1, Author           
Xu, Qiunan1, Author           
Koepernik, Klaus2, Author
Fu, Chenguang1, Author           
Gooth, Johannes1, Author           
van den Brink, Jeroen2, Author
Felser, C.3, Author           
Sun, Yan1, Author           
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: Since spin currents can be generated, detected, and manipulated via the spin Hall effect (SHE), the design of strong SHE materials has become a focus in the field of spintronics. Because of the recent experimental progress also the spin Nernst effect (SNE), the thermoelectrical counterpart of the SHE, has attracted much interest. Empirically strong SHEs and SNEs are associated with d-band compounds, such as transition metals and their alloys-the largest spin Hall conductivity (SHC) in a p-band material is similar to 450 ((h) over bar /e) (Omega cm)(-1) for a Bi-Sb alloy, which is only about a fifth of platinum. This raises the question whether either the SHE and SNE are naturally suppressed in p-bands compounds, or favourable p-band systems were just not identified yet. Here we consider the p-band semimetal InBi, and predict it has a record SHC sigma(z)(xy) approximate to 1100 ((h) over bar /e) (Omega cm)(-1) which is due to the presence of nodal lines in its band structure. Also the spin-Nernst conductivity sigma(z)(xy) approximate to 1.2 ((h) over bar /e)(A/m . K) is very large, but our analysis shows its origin is different as the maximum appears in a different tensor element compared to that in SHC. This insight gained on InBi provides guiding principles to obtain a strong SHE and SNE in p-band materials and establishes a more comprehensive understanding of the relationship between the SHE and SNE.

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Language(s): eng - English
 Dates: 2020-09-012020-09-01
 Publication Status: Published in print
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 Identifiers: ISI: 000568308100001
DOI: 10.1088/1367-2630/abaa87
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Title: New Journal of Physics
  Abbreviation : New J. Phys.
Source Genre: Journal
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Publ. Info: Bristol : IOP Publishing
Pages: - Volume / Issue: 22 (9) Sequence Number: 093003 Start / End Page: 1 - 8 Identifier: ISSN: 1367-2630
CoNE: https://pure.mpg.de/cone/journals/resource/954926913666