Low-energy excitations, symmetry breaking and specific heat in YbBiPt

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The heavy fermion compound YbBiPt has a very large linear coefficient of specific heat {gamma} = 8 Jmol{sup {minus}1} K{sup {minus}2} and this is understood, to first order, in terms of the observed low-energy neutron scattering response. However, at low temperatures, symmetry forbidden splittings at 1 and 2 meV respectively are observed. These levels give good qualitative agreement with the measured specific heat, but poor quantitative agreement. Indeed, the specific heat drops more rapidly with temperature that can be accounted for assuming a temperature-independent density of states. The authors also present new low-temperature crystallographic data, which rule out any significant ... continued below

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7 p.

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Robinson, R.A.; Christianson, A.; Nakotte, H.; Beyermann, W.P. & Canfield, P.C. December 31, 1998.

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Description

The heavy fermion compound YbBiPt has a very large linear coefficient of specific heat {gamma} = 8 Jmol{sup {minus}1} K{sup {minus}2} and this is understood, to first order, in terms of the observed low-energy neutron scattering response. However, at low temperatures, symmetry forbidden splittings at 1 and 2 meV respectively are observed. These levels give good qualitative agreement with the measured specific heat, but poor quantitative agreement. Indeed, the specific heat drops more rapidly with temperature that can be accounted for assuming a temperature-independent density of states. The authors also present new low-temperature crystallographic data, which rule out any significant structural distortions.

Physical Description

7 p.

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INIS; OSTI as DE99001843

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  • International conference on strongly correlated electron systems, Paris (France), 14-18 Jul 1998

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  • Other: DE99001843
  • Report No.: LA-UR--98-2816
  • Report No.: CONF-980745--
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/314154 | External Link
  • Office of Scientific & Technical Information Report Number: 314154
  • Archival Resource Key: ark:/67531/metadc688205

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  • December 31, 1998

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  • July 25, 2015, 2:20 a.m.

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  • May 23, 2016, 1:29 p.m.

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Robinson, R.A.; Christianson, A.; Nakotte, H.; Beyermann, W.P. & Canfield, P.C. Low-energy excitations, symmetry breaking and specific heat in YbBiPt, report, December 31, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc688205/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.