Electronic structure and electron-phonon coupling of doped graphene layers in KC8

نویسندگان

  • A. Grüneis
  • C. Attaccalite
  • A. Rubio
  • D. V. Vyalikh
  • S. L. Molodtsov
  • J. Fink
  • R. Follath
  • W. Eberhardt
  • B. Büchner
  • T. Pichler
چکیده

A. Grüneis,1,2 C. Attaccalite,3 A. Rubio,3 D. V. Vyalikh,4 S. L. Molodtsov,4 J. Fink,2,5 R. Follath,5 W. Eberhardt,5 B. Büchner,1 and T. Pichler1 1Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria 2IFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany 3Departamento de Fisica de Materiales, Nano-Bio Spectroscopy Group and European Theoretical Spectroscopy Facility (ETSF), Unidad de Materiales Centro Mixto CSIC-UPV/EHU, Universidad del Pais Vasco, Avenida de Tolosa 72, E-20018 Donostia, Spain 4Institut für Festkörperphysik, TU Dresden, Mommsenstrasse 13, D-01069 Dresden, Germany 5Helmholtz-Zentrum Berlin, Albert-Einstein-Strasse 15, 12489 Berlin, Germany Received 9 February 2009; revised manuscript received 6 April 2009; published 8 May 2009

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Band structure and many body effects in graphene

We have determined the electronic bandstructure of clean and potassium-doped single layer graphene, and fitted the graphene π bands to a oneand three-near-neighbor tight binding model. We characterized the quasiparticle dynamics using angle resolved photoemission spectroscopy. The dynamics reflect the interaction between holes and collective excitations, namely plasmons, phonons, and electron-h...

متن کامل

Electronic structure of superconducting KC8 and nonsuperconducting LiC6 graphite intercalation compounds: evidence for a graphene-sheet-driven superconducting state.

We have performed photoemission studies of the electronic structure in LiC(6) and KC(8), a nonsuperconducting and a superconducting graphite intercalation compound, respectively. We have found that the charge transfer from the intercalant layers to graphene layers is larger in KC(8) than in LiC(6), opposite of what might be expected from their chemical composition. We have also measured the str...

متن کامل

نقش دینامیک شبکه در ابررسانای La2-xBaxCuO4 به روش DFT

Electron-phonon coupling parameters are calculated for La2-x BaxCuO4 cuprate superconductor in a wide range of dopings, from undoped to overdoped compounds. In this study we aim to study the quality of such calculations based on DFT method so, the results of σ GGA+U electronic structure calculations are also investigated. The obtained value for electron-phonon coupling is in the same order of p...

متن کامل

Doped graphene as tunable electron-phonon coupling material.

We present a new way to tune the electron-phonon coupling (EPC) in graphene by changing the deformation potential with electron/hole doping. We show the EPC for highest optical branch at the high symmetry point K acquires a strong dependency on the doping level due to electron-electron correlation not accounted in mean-field approaches. Such a dependency influences the dispersion (with respect ...

متن کامل

Raman spectroscopy of graphene and graphite: Disorder, electron–phonon coupling, doping and nonadiabatic effects

We review recent work on Raman spectroscopy of graphite and graphene. We focus on the origin of the D and G peaks and the second order of the D peak. The G and 2D Raman peaks change in shape, position and relative intensity with number of graphene layers. This reflects the evolution of the electronic structure and electron–phonon interactions. We then consider the effects of doping on the Raman...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2009