scholarly journals Spin-Triplet Superconductivity Induced by Charge Fluctuations in Extended Hubbard Model

2005 ◽  
Vol 74 (9) ◽  
pp. 2579-2585 ◽  
Author(s):  
Seiichiro Onari ◽  
Ryotaro Arita ◽  
Kazuhiko Kuroki ◽  
Hideo Aoki
Keyword(s):  
Hubbard Model ◽  
Extended Hubbard Model ◽  
Charge Fluctuations ◽  
Spin Triplet

Pairing by dynamic charge fluctuations in the extended Hubbard model

1990 ◽  
Vol 42 (7) ◽  
pp. 4865-4868 ◽  
Author(s):  
Yunkyu Bang ◽  
Khandker Quader ◽  
Elihu Abrahams ◽  
Peter B. Littlewood
Keyword(s):  
Hubbard Model ◽  
Extended Hubbard Model ◽  
Charge Fluctuations ◽  
Dynamic Charge

Charge fluctuations in the four-band extended Hubbard model

1995 ◽  
Vol 52 (9) ◽  
pp. 6880-6893 ◽  
Author(s):  
F. Bucci ◽  
C. Castellani ◽  
C. Di Castro ◽  
M. Grilli
Keyword(s):  
Hubbard Model ◽  
Extended Hubbard Model ◽  
Charge Fluctuations

STRIPE PHASE OF THE EXTENDED HUBBARD MODEL

2003 ◽  
Vol 17 (04n06) ◽  
pp. 573-577
Author(s):  
ROBERTA CITRO
Keyword(s):  
Hubbard Model ◽  
Strong Coupling ◽  
Low Energy ◽  
Extended Hubbard Model ◽  
Cumulant Expansion ◽  
Charge Fluctuations ◽  
Perturbative Approach ◽  
Stripe Phase ◽  
Energy Behavior ◽  
Stripe Order

Within a strong-coupling perturbative approach, based on a Cumulant Expansion of the extended single-band Hubbard model, we analyze the low-energy behavior of the chargevertex function. It is shown that quantum critical charge fluctuations drive the system towards a stripe-phase characterized by a finite wave-vector that yields information on the stripe order. Some relevant features observed in ARPES experiments on Bi2212 and LSCO are qualitatively reproduced.

COLLECTIVE EXCITATIONS IN SUPERCONDUCTORS AND SEMICONDUCTORS IN THE PRESENCE OF A CONDENSED PHASE

2010 ◽  
Vol 24 (25n26) ◽  
pp. 5179-5191 ◽  
Author(s):  
ZLATKO KOINOV
Keyword(s):  
Hubbard Model ◽  
Condensed Phase ◽  
Correlation Functions ◽  
Light Propagation ◽  
Collective Excitations ◽  
Extended Hubbard Model ◽  
Spin Triplet

We first study the spectrum of the excitonic polaritons in semiconductors in the presence of a condensed phase. With the help of the Hubbard-Stratonovich transformation we propose an exact mapping of the extended Hubbard model onto an excitonic-polariton model describing the light propagation in semiconductors. This approach allows us to derive exact formulas for spin-spin and charge-charge correlation functions for spin-triplet superconductivity.

Stability ofs+id-Wave Pairing State in the 2-D Extended Hubbard Model

1995 ◽  
Vol 64 (3) ◽  
pp. 922-926 ◽  
Author(s):  
Hiroki Tsuchiura ◽  
Yukio Tanaka ◽  
Yasunari Ushijima
Keyword(s):  
Hubbard Model ◽  
Extended Hubbard Model ◽  
Pairing State ◽  
Wave Pairing
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