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Quest for Band Renormalization and Self-Energy in Correlated f-Electron Systems

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Durakiewicz T., Riseborough P., Batista C., Yang Y., Oppeneer P., Joyce J., Bauer E., Graham K.

issue 2

264-267

Coexisting low-energy scales are observed in f-electron materials. The information about some of low-energy scales is imprinted in the electron self-energy, which can be measured by angle-resolved photoemission (ARPES). Such measurements in d-electron materials over the last decade were based on high energy- and momentum- resolution ARPES techniques used to extract the self-energy information from measured spectra. Simultaneously, many-body theoretical approaches have been developed to find a link between the self-energy and many-body interactions. Here we show the transcription of such methods from d-electrons to f-electrons by presenting the first example of low energy scales in the f-electron material USb_2, measured with synchrotron-based ARPES. The proposed approach will help in answering the fundamental questions about the complex nature of the heavy fermion state.

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1 Acta Physica Polonica A

1 2010

1 Batista C.

1 Bauer E.

1 Durakiewicz T.

1 Graham K.

1 Joyce J.

1 Oppeneer P.

1 Riseborough P.

1 Yang Y.

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Quest for Band Renormalization and Self-Energy in Correlated f-Electron Systems