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  Low temperature thermodynamic investigation of the phase diagram of Sr3Ru2O7

Sun, D., Rost, A. W., Perry, R. S., Mackenzie, A. P., & Brando, M. (2018). Low temperature thermodynamic investigation of the phase diagram of Sr3Ru2O7. Physical Review B, 97(11): 115101, pp. 1-8. doi:10.1103/PhysRevB.97.115101.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-DB9B-B Version Permalink: http://hdl.handle.net/21.11116/0000-0000-DB9D-9
Genre: Journal Article

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Sun, D.1, Author              
Rost, A. W.2, Author
Perry, R. S.2, Author
Mackenzie, A. P.3, Author              
Brando, M.4, Author              
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2External Organizations, ou_persistent22              
3Andrew Mackenzie, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863463              
4Manuel Brando, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863469              

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 Abstract: We studied the phase diagram of Sr3Ru2O7 by means of heat capacity and magnetocaloric effect measurements at temperatures as low as 0.06 K and fields up to 12 T. We confirm the presence of a new quantum critical point at 7.5 T which is characterized by a strong non-Fermi-liquid behavior of the electronic specific heat coefficient Lambda C/T similar to - log T over more than a decade in temperature, placing strong constraints on theories of its criticality. In particular logarithmic corrections are found when the dimension d is equal to the dynamic critical exponent z, in contrast to the conclusion of a two-dimensional metamagnetic quantum critical end point, recently proposed. Moreover, we achieved a clear determination of the new second thermodynamic phase adjoining the first one at lower temperatures. Its thermodynamic features differ significantly from those of the dominant phase and characteristics expected of classical equilibrium phase transitions are not observed, indicating fundamental differences in the phase formation.

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Language(s): eng - English
 Dates: 2018-03-012018-03-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
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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: 97 (11) Sequence Number: 115101 Start / End Page: 1 - 8 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008