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Calculation of excited polaron states in the Holstein model


Barišić, Osor-Slaven
Calculation of excited polaron states in the Holstein model // Physical Review B, 69 (2004), 064302-064311 (međunarodna recenzija, članak, znanstveni)


Naslov
Calculation of excited polaron states in the Holstein model

Autori
Barišić, Osor-Slaven

Izvornik
Physical Review B (0163-1829) 69 (2004); 064302-064311

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Polaron; Holstein model; excited states

Sažetak
An exact diagonalization technique is developed to investigate the excited polaron states in the Holstein model for the infinite one-dimensional lattice. A new and comprehensive picture involving three excited (coherent) polaron bands below the phonon threshold is obtained. The fact that the Hamiltonian is invariant under the space inversion is used to show that the optical conductivity and single-electron absorption spectra are complementary. For the single-electron absorption the contributions of the coherent excited states of even parity are found to be important in the crossover regime. Furthermore, it is shown that in this regime the hybridization of two polaron states allows a straightforward description of the ground and first excited state. The connection between the excited bands and renormalized local phonon excitations of the strong coupling adiabatic theory is established.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
Rad je kao predavanje prezentiran na skupu Annual APS March Meeting 2004, održanom od 22.-26. 03. 2004., Montreal, Kanada



POVEZANOST RADA


Projekt / tema
0035007

Ustanove
Institut za fiziku, Zagreb

Autor s matičnim brojem:
Osor-Slaven Barišić, (226036)

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • SCI-EXP, SSCI i/ili A&HCI