f-Electron spectral function near a quantum critical point
نویسندگان
چکیده
منابع مشابه
f-Electron spectral function near a quantum critical point
We calculate the f-electron spectral function using a Keldysh formalism for the Falicov–Kimball model in infinite dimensions. We study the region close to the quantum critical point on both the hypercubic and Bethe lattices. r 2005 Elsevier B.V. All rights reserved. PACS: 71.10. w; 71.27.+a; 71.30.+h
متن کاملFermi Liquid near a Quantum Critical Point *
We investigate the approach to the quantum critical point of a Pomeranchuk instability from the symmetric, disordered side of the phase diagram. In the low-temperature limit, a Fermi liquid description of the metal is possible and becomes exact for T → 0. We discuss in detail which features of the approach to quantum criticality can be captured within Fermi liquid theory and which are outside o...
متن کاملQuench dynamics near a quantum critical point
We study the dynamical response of a system to a sudden change of the tuning parameter starting or ending at the quantum critical point. In particular, we analyze the scaling of the excitation probability, number of excited quasiparticles, heat and entropy with the quench amplitude, and the system size. We extend the analysis to quenches with arbitrary power law dependence on time of the tuning...
متن کاملThermoelectric Behavoir Near Magnetic Quantum Critical Point
We use the coupled 2d-spin-3d-fermion model proposed by Rosch et. al. (Phys. Rev. Lett. 79, 159 (1997)) to study the thermoelectric behaviour of a heavy fermion compound when it is close to an antiferromagnetic quantum critical point. When the low energy spin fluctuations are quasi two dimensional, as has been observed in YbRh2Si2 and CeCu6−xAux, with a typical 2d ordering wavevector and 3d Fer...
متن کاملQuantum Critical Point in Electron-Doped Cuprates
We analyze doping dependent spectral intensities and Fermi surface maps obtained recently in Nd2−xCexCuO4±δ (NCCO) via high resolution ARPES measurements, and show that the behavior of this electron-doped compound can be understood as the closing of a Mott (pseudo) gap, leading to a quantum critical point just above optimal doping. The doping dependence of the effective Hubbard U adduced by com...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physica B: Condensed Matter
سال: 2005
ISSN: 0921-4526
DOI: 10.1016/j.physb.2005.01.192