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  Search for a quantum critical end-point in CeRu2(Si1-xGex)2

Weickert, F., Gegenwart, P., Mydosh, J. A., Steglich, F., Kanadani, C., Tabata, Y., et al. (2005). Search for a quantum critical end-point in CeRu2(Si1-xGex)2. Physica B-Condensed Matter, 359-361, 68-70. doi:10.1016/j.physb.2004.12.059.

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 Creators:
Weickert, F.1, Author              
Gegenwart, P.2, Author              
Mydosh, J. A.1, Author              
Steglich, F.3, Author              
Kanadani, C., Author
Tabata, Y., Author
Taniguchi, T., Author
Kawarazaki, S., Author
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
3Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              

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 Abstract: We use high-resolution dilatometry and electrical resistivity down to 20 mK and millitesla magnetic field steps to search for a possible quantum critical (end-) point (QC(E)P) in CeRu22(Si1-x1-xGexx)22 with x=0.00x=0.00 and 0.02 at the metamagnetic transition (MMT), Bm=7.8Bm=7.8 and 6.8 T, respectively. We do not find any evidence for QCEP since (i) the peak height and FWHM of the magnetostrictive anomaly saturate below 0.2 K and (ii) the thermal expansion and the electrical resistivity indicate the formation of a Landau–Fermi liquid (LFL) state below 0.3 K even at B=BmB=Bm. We speculate that the metamagnetic crossover represents a Fermi surface reconstruction that is fully completed below 0.2 K.

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Language(s): eng - English
 Dates: 2005-04-30
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 241986
DOI: 10.1016/j.physb.2004.12.059
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Title: Physica B-Condensed Matter
  Other : Physica B
Source Genre: Journal
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Publ. Info: Amsterdam : North-Holland
Pages: - Volume / Issue: 359-361 Sequence Number: - Start / End Page: 68 - 70 Identifier: ISSN: 0921-4526
CoNE: https://pure.mpg.de/cone/journals/resource/954928575733