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Effects of spin-orbit coupling and many-body correlations in STM transport through copper phthalocyanine.

ABSTRACT: The interplay of exchange correlations and spin-orbit interaction (SOI) on the many-body spectrum of a copper phtalocyanine (CuPc) molecule and their signatures in transport are investigated. We first derive a minimal model Hamiltonian in a basis of frontier orbitals that is able to reproduce experimentally observed singlet-triplet splittings. In a second step SOI effects are included perturbatively. Major consequences of the SOI are the splitting of former degenerate levels and a magnetic anisotropy, which can be captured by an effective low-energy spin Hamiltonian. We show that scanning tunneling microscopy-based magnetoconductance measurements can yield clear signatures of both these SOI-induced effects.

SUBMITTER: Siegert B

PROVIDER: S-EPMC4734453 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature

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Effects of spin-orbit coupling and many-body correlations in STM transport through copper phthalocyanine.

Siegert Benjamin B Donarini Andrea A Grifoni Milena M

Beilstein journal of nanotechnology 20151222

The interplay of exchange correlations and spin-orbit interaction (SOI) on the many-body spectrum of a copper phtalocyanine (CuPc) molecule and their signatures in transport are investigated. We first derive a minimal model Hamiltonian in a basis of frontier orbitals that is able to reproduce experimentally observed singlet-triplet splittings. In a second step SOI effects are included perturbatively. Major consequences of the SOI are the splitting of former degenerate levels and a magnetic aniso ...[more]

PMID: 26885457

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