Quantum Criticality of the Heavy-Fermion Compound YbAuCu_4(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
スポンサーリンク
概要
- 論文の詳細を見る
We have investigated evolution of transport and low-energy spin fluctuation properties of the heavy fermion compound YbAuCu_4 with the application of magnetic field, and found that the material can be driven from the originally antiferromagnetically (AFM) ordered ground state (Neel temperature T_N〜0.8K) to a nonmagnetic Fermi liquid one through the field-tuned quantum critical point (QCP) at H_<cr>[〜!-]13kOe. The electrical resistivity measurement down to 55mK in the vicinity of H_<cr> (T_N→0) provides evidence for the increase in the inelastic scattering of heavy electrons, and the ^63Cu spin-lattice relaxation rate 1/T_1T measurement down to 1.35K near H_<cr> exhibits the occurrence of the AFM order instability. Temperature and field participating in the non-Fermi liquid (NFL) phenomena in the vicinity of H_<cr> are about one order higher in energy than those in YbRh_2Si_2 that has been intensively investigated as only one NFL material among the stoichiometric Yb-based compounds. It is mentioned that in both compound, the quasiparticle mass does not diverge but remains finite in the field-tuned QCP. An additional new information provided in this study is that the Kondo temperature T_K derived from the resisitivity maximum and/or the 1/T_1T maximum monotonically increases with increasing field, contrary to the increase in the localization character of f electrons.
- 2007-06-15
著者
-
YAMAMOTO Aya
Department of Physics, Graduate School of Science, Kobe University
-
WADA Shinji
Department of Physics, Graduate School of Science, Kobe University
-
SARRAO John
Los Alamos National Laboratory
-
Wada Shinji
Department Of Physics Graduate School Of Science Kobe University
-
Yamamoto Aya
Department Of Physics Graduate School Of Science Kobe University:(present Office)international Innov
-
Yamamoto Aya
Department Of Food Science And Nutrition Doshisha Women's College
-
Wada Shinji
Department Of Material Science Graduate School Of Science & Technology Kobe University
関連論文
- Quantum Criticality of the Heavy-Fermion Compound YbAuCu_4(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Non-Fermi Liquid-Like Behavior in a Heavy Lanthanide Compound YbFe_4P_ with Filled Skutterudite Structure Probed by ^P-NMR(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Superconductivity in Cerium- and Plutonium-Based '115' Materials(Frontiers of Novel Superconductivity in Heavy Fermion Compounds)
- Combination of Dense Kondo Effect and RKKY Interaction in CeCuSb_2, Investigated by NMR
- Observation of Symmetry Lowering Associated with the Metal-Insulator Transition in SmRu_4P_ by ^Ru-NQR(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Phase Transition from Antiferromagnetic Insulator to Ferromagnetic Metal in La_Sr_xCoO_4 : Magnetization and NMR Studies
- Antiferromagnetic Ordering Coupled with Phonon Mode Anomalies in Rare-Earth Cuprate NdCu_2O_4, Probed by Nuclear Quadrupole Resonance and Raman Spectroscopy(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
- Nuclear Magnetic Resonance Study on Low-Dimensional Antiferromagnetic Oxides : VOMoO_4 and (V_Mo_)_2O_5 : Condensed Matter: Electronic Properties, etc.
- Microscopic Investigation of Possible Multipole Ordering in SmRu_4P_ by ^P-NMR(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)
- NMR Investigation of an Itinerant Weakly Antiferromagnetism in Metallic Thiospinels CoCo_2S_4 and (Co_Cu_x)Co_2S_4
- NMR Study of Antiferromagnetic Spinel CoCo_2O_4 in Paramagnetic and Ordered State
- Identification of Kaempferol from the Leaves of Diospyros kaki and its Antimicrobial Activity against Streptococcus mutans
- Successive Multipole Orderings in TmTe, Probed by ^Te-NMR(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Screening Methodology for Discovery of Inhibitory Peptides against Pathogenic Proteins using a Plug-plug Affinity Capillary Electrophoresis Technique
- Combination of Dense Kondo Effect and RKKY Interaction in CeCuSb2, Investigated by NMR
- Antiferromagnetic Ordering Coupled with Phonon Mode Anomalies in Rare-Earth Cuprate NdCu_2O_4, Probed by Nuclear Quadrupole Resonance and Raman Spectroscopy(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)