Hubbard pair cluster in the external fields. Studies of the chemical potential

T. Balcerzak and K. Szałowski

Physica A: Statistical Mechanics and its Applications, 2017, vol. 468, issue C, 252-266

Abstract: The chemical potential of the two-site Hubbard cluster (pair) embedded in the external electric and magnetic fields is studied by exact diagonalization of the Hamiltonian. The formalism of the grand canonical ensemble is adopted. The influence of temperature, Hubbard on-site Coulombic energy U and electron concentration on the chemical potential is investigated and illustrated in figures. In particular, a discontinuous behaviour of the chemical potential (or electron concentration) in the ground state is discussed.

Keywords: Hubbard model; Dimer; Pair cluster; Chemical potential; Exact diagonalization; Grand canonical ensemble (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:468:y:2017:i:c:p:252-266

DOI: 10.1016/j.physa.2016.11.004

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