Giant enhancement of anisotropy by electron-phonon interaction
نویسندگان
چکیده
منابع مشابه
A NUMERICAL RENORMALIZATION GROUP APPROACH FOR AN ELECTRON-PHONON INTERACTION
A finite chain calculation in terms of Hubbard X-operators is explored by setting up a vibronic Harniltonian. The model conveniently transformed into a form so that in the case of strong coupling a numerical renormalization group approach is applicable. To test the technique, a one particle Green function is calculated for the model Harniltonian
متن کاملElectron-phonon interaction and charge carrier mass enhancement in SrTiO3.
We report a comprehensive THz, infrared and optical study of Nb-doped SrTiO3 as well as dc conductivity and Hall effect measurements. Our THz spectra at 7 K show the presence of an unusually narrow (<2 meV) Drude peak. For all carrier concentrations the Drude spectral weight shows a factor of three mass enhancement relative to the effective mass in the local density approximation, whereas the s...
متن کاملa numerical renormalization group approach for an electron-phonon interaction
a finite chain calculation in terms of hubbard x-operators is explored by setting up a vibronic harniltonian. the model conveniently transformed into a form so that in the case of strong coupling a numerical renormalization group approach is applicable. to test the technique, a one particle green function is calculated for the model harniltonian
متن کاملElectron-Phonon Mass Enhancement in Multi-Layers
A strong electron-phonon interaction in a metal increases the electron density of states in the vicinity of the Fermi energy dramatically. This phenomenon is called electron-phonon mass enhancement. In this paper the question is investigated whether the mass enhancement can be manipulated in multi-layers of two metals with strong and weak electron-phonon interaction. A rich behavior is observed...
متن کاملRenormalization of the Drude conductivity by the electron-phonon interaction.
It is commonly believed that the Drude conductivity is not renormalized by many-body interactions. To the contrary, we show that for impure metals the Drude conductivity is decreased by a temperaturedependent factor proportional to the electron-phonon coupling l. We demonstrate this effect by both the linear response and the quantum transport approaches. This effect, while comparable to the bar...
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: 1999
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.59.13531