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Pairing correlations in the two-layer attractive Hubbard model

หน่วยงาน Nanyang Technological University, Singapore

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ชื่อเรื่อง : Pairing correlations in the two-layer attractive Hubbard model
นักวิจัย : Zujev, Aleksander , Scalettar, Richard T. , Batrouni, George G. , Sengupta, Pinaki
คำค้น : DRNTU::Science::Mathematics
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2557
อ้างอิง : Zujev, A., Scalettar, R. T., Batrouni, G. G., & Sengupta, P. (2014). Pairing correlations in the two-layer attractive Hubbard model. New Journal of Physics, 16(1), 013004-. , 1367-2630 , http://hdl.handle.net/10220/18879 , http://dx.doi.org/10.1088/1367-2630/16/1/013004
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : New journal of physics
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Studies of systems with two fermionic bands (or equivalently, layers) with repulsive interaction strength U have a long history, with the periodic Anderson model (PAM) being one of the most frequently considered Hamiltonians. In this paper, we use quantum Monte Carlo to study analogous issues for attractive interactions. As in the PAM, we focus on a case where one band (layer) is uncorrelated (U = 0), and the effect of hybridization V between the bands (layers) on the pairing correlations. A key difference with the PAM is that there is no sign problem, so that we are better able to explore the physics of doped bilayer attractive systems at low temperatures (except in the case of exponentially small transition temperatures) whereas ground state properties of repulsive models can be determined only at half-filling. For small V , pairing in the U < 0 layer induces pairing in the U = 0 layer. At larger V superfluidity is suppressed at the low but finite T at which the quantum Monte Carlo was performed. The quantum Monte Carlo data are complemented by results obtained with the Bogoliubov–de Gennes approximation.

บรรณานุกรม :
Zujev, Aleksander , Scalettar, Richard T. , Batrouni, George G. , Sengupta, Pinaki . (2557). Pairing correlations in the two-layer attractive Hubbard model.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zujev, Aleksander , Scalettar, Richard T. , Batrouni, George G. , Sengupta, Pinaki . 2557. "Pairing correlations in the two-layer attractive Hubbard model".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Zujev, Aleksander , Scalettar, Richard T. , Batrouni, George G. , Sengupta, Pinaki . "Pairing correlations in the two-layer attractive Hubbard model."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2557. Print.
Zujev, Aleksander , Scalettar, Richard T. , Batrouni, George G. , Sengupta, Pinaki . Pairing correlations in the two-layer attractive Hubbard model. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2557.