The high-field Fermi surface of YbRh2Si2
نویسندگان
چکیده
منابع مشابه
Magnetic-field dependence of the YbRh2Si2 Fermi surface.
Magnetic-field-induced changes of the Fermi surface play a central role in theories of the exotic quantum criticality of YbRh2Si2. We have carried out de Haas-van Alphen measurements in the magnetic-field range 8 T < or = H < or = 16 T, and directly observe field dependence of the extremal Fermi surface areas. Our data support the theory that a low-field "large" Fermi surface, including the Yb ...
متن کاملHigh-field phase diagram of the heavy-fermion metal YbRh2Si2
The tetragonal heavy-fermion (HF) metal YbRh2Si2 (Kondo temperature TK ≈ 25 K) exhibits a magnetic field-induced quantum critical point related to the suppression of very weak antiferromagnetic (AF) ordering (TN = 70 mK) at a critical field of Bc = 0.06 T (B ⊥ c). To understand the influence of magnetic fields on quantum criticality and the Kondo effect, we study the evolution of various thermo...
متن کاملFractionalization and Fermi-surface volume in heavy-fermion compounds: the case of YbRh2Si2.
We establish an effective theory for heavy-fermion compounds close to a zero temperature antiferromagnetic (AFM) transition. Coming from the heavy Fermi liquid phase across to the AFM phase, the heavy electron fractionalizes into a light electron, a bosonic spinon, and a new excitation: a spinless fermionic field. Assuming this field acquires dynamics and dispersion when one integrates out the ...
متن کامل“Zeeman-Driven Lifshitz Transition: A Model for the Experimentally Observed Fermi-Surface Reconstruction in YbRh2Si2”
Our Letter [1] proposed the scenario of a Zeemandriven Lifshitz quantum phase transition (QPT) to explain various thermodynamic and transport anomalies found in the heavy-fermion metal YbRh2Si2, in particular their dependence on magnetic field and doping. The Comment by Shaginyan et al. [2] claims that (a) our results, while qualitatively correct, are quantitatively incorrect because we have ig...
متن کاملEffective Field Theory and the Fermi Surface
This is an introduction to the method of effective field theory. As an application, I derive the effective field theory of low energy excita-tions in a conductor, the Landau theory of Fermi liquids, and explain why the high-T c superconductors must be described by a different effective field theory. Lectures presented at TASI 1992.
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2009
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/150/4/042165