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Bipolarons and polarons in the Holstein-Hubbard model : Analogies and differences


Barišić, Osor-Slaven; Barišić, Slaven
Bipolarons and polarons in the Holstein-Hubbard model : Analogies and differences // European physical journal B : condensed matter physics, 85 (2012), 3; 111-123 doi:10.1140/epjb/e2012-21079-2 (međunarodna recenzija, članak, znanstveni)


Naslov
Bipolarons and polarons in the Holstein-Hubbard model : Analogies and differences

Autori
Barišić, Osor-Slaven ; Barišić, Slaven

Izvornik
European physical journal B : condensed matter physics (1434-6028) 85 (2012), 3; 111-123

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

Ključne riječi
Bipolaron; polaron; Holstein-Hubbard; electron; phonon; coupling

Sažetak
The single bipolaron problem is examined in the context of the 1D Holstein-Hubbard model, emphasizing analogies and differences with respect to the complementary single polaron physics. The bipolaron band structure below the phonon threshold is revealed, showing a complex relationship between numerous excited bands as the adiabatic limit is approached. Light bipolarons with significant binding energy, the stability of large bipolarons, the small to large bipolaron crossover as a function of the Hubbard repulsion, as well as the bipolaron dissociation, are investigated in detail, disentangling adiabatic, nonadiabatic and lattice coarsening effects. It is emphasized that condensation of bipolarons occurs in the dilute limit only at very low temperatures.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
035-0000000-3187 - Kriticne pojave i sustavi izvan ravnoteze (Katarina Uzelac, )
119-1191458-0512 - Niskodimenzionalni jako korelirani vodljivi sustavi (Slaven Barišić, )

Ustanove
Institut za fiziku, Zagreb,
Prirodoslovno-matematički fakultet, Zagreb

Časopis indeksira:


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


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