The quantum critical point in CeRhIn5: a resistivity study

• Knebel Georg

  Commissariat à l’ Énergie Atomic, INAC, SPSMS

• Aoki Dai

  Commissariat à l’ Énergie Atomic, INAC, SPSMS

• Brison Jean-Pascal

  Commissariat à l’ Énergie Atomic, INAC, SPSMS

• Flouquet Jacques

  Commissariat à l’ Énergie Atomic, INAC, SPSMS

書誌事項

タイトル別名

• The Quantum Critical Point in CeRhIn<SUB>5</SUB>: A Resistivity Study

抄録

The pressure–temperature phase diagram of CeRhIn₅ has been studied under high magnetic field by resistivity measurements. Clear signatures of a quantum critical point has been found at a critical pressure of p_c≈2.5 GPa. The field induced magnetic state in the superconducting state is stable up to the highest measured field. At p_c the antiferromagnetic ground-state under high magnetic field collapses very rapidly. Clear signatures of p_c are the strong enhancement of the resistivity in the normal state and of the inelastic scattering term. No clear T² temperature dependence could be found for pressures above T_c. From the analysis of the upper critical field within a strong coupling model we present the pressure dependence of the coupling parameter λ and the gyromagnetic ratio g. No signatures of a spatially modulated order parameter could be evidenced. A detailed comparison with the magnetic field–temperature phase diagram of CeCoIn₅ is given. The comparison between CeRhIn₅ and CeCoIn₅ points out the importance to take into account the field dependence of the effective mass in the calculation of the superconducting upper critical field H_c2. It suggests also that when the magnetic critical field H_M(0) becomes lower than H_c2(0), the persistence of a superconducting pseudo-gap may stick the antiferromagnetism to H_c2(0).

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ

  Ｊｏｕｒｎａｌ　ｏｆ　ｔｈｅ　Ｐｈｙｓｉｃａｌ　Ｓｏｃｉｅｔｙ　ｏｆ　Ｊａｐａｎ 77 (11), 114704-114704, 2008

  一般社団法人 日本物理学会

キーワード

• CeRhIn<SUB>5</SUB>
• heavy fermion superconductor
• quantum critical point
• upper critical field

詳細情報

• CRID: 1390282679174696704
• NII論文ID: 130005436210
• NII論文ID: 110006983751
• NII論文ID: 210000107533
• NII書誌ID: AA00704814
• DOI: 10.1143/jpsj.77.114704
• ISSN: 13474073
• ISSN: 00319015
• NDL書誌ID: 9706412
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9706412
• Web Site: https://journals.jps.jp/doi/pdf/10.1143/JPSJ.77.114704
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可