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  Temperature-field phase diagram of geometrically frustrated CePdAl

Zhao, H., Zhang, J., Hu, S., Isikawa, Y., Luo, J., Steglich, F., et al. (2016). Temperature-field phase diagram of geometrically frustrated CePdAl. Physical Review B, 94(23): 235131, pp. 1-5. doi:10.1103/PhysRevB.94.235131.

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 Creators:
Zhao, Hengcan1, Author
Zhang, Jiahao1, Author
Hu, Sile1, Author
Isikawa, Yosikazu1, Author
Luo, Jianlin1, Author
Steglich, Frank2, Author           
Sun, Peijie1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              

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 Abstract: A rich temperature-field phase diagram has been constructed for the geometrically frustrated, Ising-like heavy-fermion compound CePdAl. In the limit of zero temperature, the magnetic field applied along the Ising axis (B parallel to c) induces a suppression of the antiferromagnetism, resulting in a sequence of phase transitions/crossovers, rather than a single critical point, in a critical region of field 3-5 T. In the lowest-temperature region, a power-law description of resistivity yields A . T-n with n > 2 for all applied fields up to at least 14 T. A quadratic-in-temperature resistivity term, however, can be extracted when assuming an additional electron-scattering channel from magnonlike excitations, with A tending to be divergent upon approaching the critical regime. Our observations suggest CePdAl to be a new playground for exotic physics arising from the competition between Kondo screening and geometrical frustration.

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Language(s): eng - English
 Dates: 2016-12-132016-12-13
 Publication Status: Issued
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 94 (23) Sequence Number: 235131 Start / End Page: 1 - 5 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008