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• W2784535331 abstract "We propose a scheme to extract the many-body spectral function of an interacting many-electron system from an equilibrium density functional theory (DFT) calculation. To this end we devise an ideal STM-like setup and employ the recently proposed steady-state DFT formalism (i-DFT) which allows to calculate the steady current through a nanoscopic region coupled to two biased electrodes. In our setup one of the electrodes serves as a probe ('STM tip'), which is weakly coupled to the system we want to measure. In the ideal STM limit of vanishing coupling to the tip, the system is restored to quasi-equilibrium and the normalized differential conductance yields the exact equilibrium many-body spectral function. Calculating this quantity from i-DFT, we derive an exact relation expressing the interacting spectral function in terms of the Kohn-Sham one. As illustrative examples we apply our scheme to calculate the spectral functions of two non-trivial model systems, namely the single Anderson impurity model and the Constant Interaction Model." @default.
• W2784535331 created "2018-02-02" @default.
• W2784535331 creator A5022675800 @default.
• W2784535331 creator A5037475731 @default.
• W2784535331 date "2018-02-13" @default.
• W2784535331 modified "2023-09-25" @default.
• W2784535331 title "Many-Body Spectral Functions from Steady State Density Functional Theory" @default.
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• W2784535331 doi "https://doi.org/10.1021/acs.nanolett.8b00255" @default.
• W2784535331 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29437404" @default.
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