The Anharmonic Electron-Phonon Problem.

نویسندگان

  • Freericks
  • Jarrell
  • Mahan
چکیده

J. K. Freericks,1 Mark Jarrell,2 and G. D. Mahan3 1Department of Physics, Georgetown University, Washington, D.C. 20057-0995 2Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221 3Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200 and Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6030 (Received 17 May 1996)

برای دانلود رایگان 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

Approximate scaling relation for the anharmonic electron-phonon problem

The interaction of electrons with anharmonic lattice vibrations is a long-standing problem that is not yet fully understood. What is surprising about this problem is that nearly all real materials are anharmonic ~as can be seen by the fact that they expand or contract upon heating!, but quasiharmonic models ~which replace the anharmonic phonons by harmonic phonons with temperature-dependent pho...

متن کامل

Dynamics of solid neon monolayers.

The dynamics of two-dimensional solid neon is investigated within the self-consistent phonon theory. Phonon frequencies and lifetimes and the one-phonon dynamic form factor are evaluated as a function of temperature and lattice spacing in the self-consistent harmonic approximation with the cubic anharmonic term added. Two-dimensional solid neon is found to be highly anharmonic. It becomes mecha...

متن کامل

Anharmonic Phonon Interactions at Interfaces and Contributions to Thermal Boundary Conductance

Continued reduction in characteristic dimensions in nanosystems has given rise to increasing importance of material interfaces on the overall system performance. With regard to thermal transport, this increases the need for a better fundamental understanding of the processes affecting interfacial thermal transport, as characterized by the thermal boundary conductance. When thermal boundary cond...

متن کامل

Phonon quasiparticles and anharmonic free energy in complex systems.

We use a hybrid strategy to obtain anharmonic frequency shifts and lifetimes of phonon quasiparticles from first principles molecular dynamics simulations in modest size supercells. This approach is effective irrespective of crystal structure complexity and facilitates calculation of full anharmonic phonon dispersions, as long as phonon quasiparticles are well defined. We validate this approach...

متن کامل

Structure, dynamics and phase transitions Anharmonic phonons and negative thermal expansion in ScF3 and Ag2O

We report progress towards understanding how phonon anharmonicity contributes to negative thermal expansion (NTE). Some contribution to the NTE is from "quasiharmonic" behavior, where phonon frequencies decrease as a crystal expands. A second "anharmonic" effect from phonon-phonon interactions is sometimes calculated by perturbation theory, but sometimes the anharmonic effects are too large to ...

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

عنوان ژورنال:
  • Physical review letters

دوره 77 22  شماره 

صفحات  -

تاریخ انتشار 1996