期刊
PHYSICAL REVIEW LETTERS
卷 110, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.137002
关键词
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资金
- Harvard-MIT CUA
- NSF [DMR-07-05472]
- ARO-MURI on Atomtronics
- U.S. Department of Energy [DE-FG02-06ER46285]
- U.S. Department of Energy (DOE) [DE-FG02-06ER46285] Funding Source: U.S. Department of Energy (DOE)
We present a microscopic theory of resonant soft-x-ray scattering that accounts for the delocalized character of valence electrons. Unlike past approaches based on local form factors, our functional determinant method treats realistic band structures. This method builds upon earlier theoretical work in mesoscopic physics and accounts for excitonic effects as well as the orthogonality catastrophe arising from interaction between the core hole and the valence band electrons. We show that the two-peak structure observed near the O K edge of stripe-ordered La1.875Ba0.125CuO4 is due to dynamical nesting within the canonical cuprate band structure. Our results provide evidence for reasonably well-defined, high-energy quasiparticles in cuprates and establish resonant soft-x-ray scattering as a bulk-sensitive probe of the electron quasiparticles. DOI: 10.1103/PhysRevLett.110.137002
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