Momentum distribution sum rule for angle-resolved photoemission

Mohit Randeria, Hong Ding, J. C. Campuzano, A. Bellman, G. Jennings, T. Yokoya, T. Takahashi, H. Katayama-Yoshida, T. Mochiku, K. Kadowaki

Research output: Contribution to journalArticlepeer-review

145 Citations (Scopus)


Within a spectral function A(k,ω) interpretation of angle-resolved photoemission (ARPES), the intensity obeys the sum rule dω fωA(k,ω)=nk, where f is the Fermi function and nk the momentum distribution. We show the usefulness of this sum rule for analyzing ARPES data. The integrated intensity in Bi2Sr2CaCu2O8 at kF is independent of temperature even though the spectrum is strongly T dependent. We also demonstrate the possibility of measuring nk using ARPES for YBa2Cu4O8.

Original languageEnglish
Pages (from-to)4951-4954
Number of pages4
JournalPhysical Review Letters
Issue number24
Publication statusPublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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