Effects of squeezing-antisqueezing in strongly coupled electron–phonon systems

✍ Scribed by Xiao-feng Pang

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 400 KB
• Volume: 259
• Category: Article
• ISSN: 0375-9601
• DOI: 10.1016/s0375-9601(99)00445-4

✦ Synopsis

The effects of squeezing-antisqueezing resulting from the motion and density fluctuation of the electrons on the properties of both electrons and phonons have been studied by using a new variational ansatz with correlated displacement Ž . and squeezing in strongly coupled electron-phonon systems. The effects results in 1 reduction of the ground state energy, Ž . and enhancement of stability of the systems, 2 increase of the binding energy of the polaron occurred and weakening of Ž . Ž . growing speed of polaron narrowing of electron band, 3 increase of the charge density wave order and 4 suppression of increased tendency of anomalous quantum fluctuation of the phonons in the systems. The antisqueezed effect plays an important role in determining the properties of the electrons and phonons in the strongly coupled electron-phonon systems.