Unbinding slave spins in the Anderson impurity model
نویسندگان
چکیده
منابع مشابه
Numerical renormalization group study of pseudo-fermion and slave-boson spectral functions in the single impurity Anderson model.
We use the numerical renormalization group to calculate the auxiliary spectral functions of the U = ∞ Anderson impurity model. The slave–boson and pseudo–fermion spectral functions diverge at the threshold with exponents αb and αf given by the X–ray photoemission and the X–ray absorption exponents respectively. In contrast to the NCA, the exact exponents obtained here depend on the impurity occ...
متن کاملac response in the nonequilibrium Anderson impurity model.
The ac response of a single Anderson impurity coupled to two reservoirs with different chemical potentials is studied using an equation of motion approach. In the Kondo regime, we show that resonant behavior in the ac response is found in the low-frequency limit and the frequency of the ac field matches the chemical potential differences. The resonant behavior is a direct consequence of the “do...
متن کاملImpurity-induced antiferromagnetic domains in the periodic Anderson model
A. Benali,1,2,* Z. J. Bai,3,† N. J. Curro,2,‡ and R. T. Scalettar2,§ 1Department of Physics, Faculty of Sciences of Tunis, University of Tunis El-Manar, Tunis 2092, Tunisia 2Department of Physics, One Shields Avenue, University of California, Davis, California 95616, USA 3Department of Computer Science, One Shields Avenue, University of California, Davis, California 95616, USA (Received 20 Apri...
متن کاملThe asymmetric single - impurity Anderson model – the modified perturbation theory
——————————————————————————————————————— Abstract We investigate the single-impurity Anderson model by means of the recently introduced modified perturbation theory. This approximation scheme yields reasonable results away from the symmetric case. The agreement with exactly known results for the symmetric case is checked, and results for the non-symmetric case are presented. With decreasing cond...
متن کاملAnderson impurity in a semiconductor.
We study an Anderson impurity in a semiconducting host using the density matrix renormalization group technique. We use the U50 one-dimensional Anderson Hamiltonian at half filling as the semiconducting host since it has a hybridization gap. By varying the hybridization of the host, we can control the size of the semiconducting gap D . We consider chains with 25 sites and we place the Anderson ...
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: Physical Review B
سال: 2017
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.96.201106