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pro vyhledávání: '"Balzarotti, Adalberto"'
Autor:
Sheverdyaeva, Polina M., Hogan, Conor, Sgarlata, Anna, Fazi, Laura, Fanfoni, Massimo, Persichetti, Luca, Moras, Paolo, Balzarotti, Adalberto
Publikováno v:
J. Phys.: Condens. Matter 30, 465502 (2018)
Thin Ge layers deposited on Si(105) form a stable single-domain film structure with large terraces and rebonded-step surface termination, thus realizing an extended and ordered Ge/Si planar hetero-junction. At the coverage of four Ge monolayers angle
Externí odkaz:
http://arxiv.org/abs/2307.01604
Lattice Hamiltonians with on-site interaction $W$ have W=0 solutions, that is, many-body {\em singlet} eigenstates without double occupation. In particular, W=0 pairs give a clue to understand the pairing force in repulsive Hubbard models. These eige
Externí odkaz:
http://arxiv.org/abs/cond-mat/0411101
Autor:
Cini, Michele, Balzarotti, Adalberto, Brunetti, Raffaella, Gimelli, Maria, Stefanucci, Gianluca
We have recently developed a canonical transformation of the Hubbard and related models, valid for systems of arbitrary size and for the full plane; this is particularly suited to study hole pairing. In this work we show that exact diagonalization re
Externí odkaz:
http://arxiv.org/abs/cond-mat/0005242
We study the Cu_{5}O_{4} cluster by exact diagonalization of a three-band Hubbard model and show that bound electron or hole pairs are obtained at appropriate fillings, and produce superconducting flux quantisation. The results extend earlier cluster
Externí odkaz:
http://arxiv.org/abs/cond-mat/9905272
Highly-symmetric three-band Hubbard Cu-O clusters have peculiar properties when the hole number is such that they admit W=0 hole pairs. These are two-hole eigenstates of the on-site Hubbard repulsion with eigenvalue 0, get bound by correlation effect
Externí odkaz:
http://arxiv.org/abs/cond-mat/9811116
We propose a canonical tranformation approach to the effective interaction $W_{eff}$ between two holes, based on the three-band Hubbard model but ready to include extra interactions as well. An effective two-body Hamiltonian can in principle be obtai
Externí odkaz:
http://arxiv.org/abs/cond-mat/9810158
We calculate the effective interaction $W_{eff}$ between two holes added to the ground state of the repulsive three-band Hubbard model. To make contact with Cooper theory and with earlier Hubbard model cluster studies, we first use a perturbative can
Externí odkaz:
http://arxiv.org/abs/cond-mat/9809278
By a canonical transformation of the three-band Hubbard model, we introduce an effective Hamiltonian for the propagation of two holes doped into the ground state of the Cu-O plane. When the pair belongs to the $^{1}B_{2}$ or $% ^{1}A_{2}$ Irreducible
Externí odkaz:
http://arxiv.org/abs/cond-mat/9808209
Autor:
Persichetti, Luca, Sgarlata, Anna, Mori, Stefano, Notarianni, Marco, Cherubini, Valeria, Fanfoni, Massimo, Motta, Nunzio, Balzarotti, Adalberto
Publikováno v:
Nanoscale Research Letters, 9
Nanoscale Research Letters
Nanoscale Research Letters
We outline a metal-free fabrication route of in-plane Ge nanowires on Ge(001) substrates. By positively exploiting the polishing-induced defects of standard-quality commercial Ge(001) wafers, micrometer-length wires are grown by physical vapor deposi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec84888ae3155bad1b5f6bb594a30475
https://hdl.handle.net/20.500.11850/86516
https://hdl.handle.net/20.500.11850/86516
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