Impurity in a Luttinger liquid away from half-filling: A numerical study
نویسندگان
چکیده
منابع مشابه
Magnetic Impurity in a Luttinger Liquid : A
Exact results are reported for the low-temperature thermodynamics of a spin-1 2 magnetic impurity coupled to a 1D interacting electron system. The use of conformal eld theory techniques reveals that there are only two types of critical behaviors consistent with the symmetries of the problem: either a local Fermi liquid, or else a theory identical to that recently proposed by Furusaki and Nagaos...
متن کاملMagnetic Impurity in a Luttinger Liquid : A Conformal Field Theory
We study the low-temperature properties of a spin-1 2 magnetic impurity coupled to a one-dimensional interacting electron system. Using the newly developed formalism by AAeck and Ludwig, with a scale invariant boundary condition replacing the impurity, we exploit boundary conformal eld theory to deduce the impurity thermal and magnetic response. In the case of only forward electron scattering o...
متن کاملImpurity in a Luttinger liquid: A numerical study of the finite-size energy spectrum and of the orthogonality catastrophe exponent.
The behavior of a single impurity in a one-dimensional Luttinger liquid is numerically investigated by means of the density matrix renormalization group. By analyzing the finite size scaling behavior of the low energy spectrum, we confirm the theoretical prediction of Kane and Fisher [Phys. Rev. Lett. 68, 1220 (1992)] both for attractive and repulsive interactions. Moreover, we calculate the ex...
متن کاملTwo-Dimensional Fermi Gas at Half Filling is a Luttinger Liquid
It is shown that in a mortel with a regular long range interaction, a 2D fermion gas at half filling of the band is a Luttinger Liquid. It is found that under certain conditions the jump in the momentum distribution of such a gas at the Fermi surface deperlds on the filling factor v in trie form +~ ((2v -1)/A(~°,
متن کاملRenormalization-group study of a magnetic impurity in a Luttinger liquid
– A generalized Anderson model for a magnetic impurity in an interacting onedimensional electron gas is studied via a mapping onto a classical Coulomb gas. For weak potential scattering, the local-moment parameter regime expands as repulsive bulk interactions become stronger, but the Kondo scale for the quenching of the impurity moment varies nonmonotonically. There also exist two regimes domin...
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: 1997
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.56.9766