The Quasiparticle Puzzle: Reconciling ARPES and FTSTS Studies of Bi2212

Journal Article · Thu Dec 17 04:00:00 EST 2009 · Submitted to Nature Physics

OSTI ID:969226

Vishik, I M; Nowadnick, E A; Lee, W S; Shen, Z X; Moritz, B; Devereaux, T P; Tanaka, K; Sasagawa, T; Fujii, T

Angle Resolved Photoemission Spectroscopy (ARPES) probes the momentum-space electronic structure of materials, and provides invaluable information about the high-temperature superconducting cuprates. Likewise, cuprates real-space, inhomogeneous electronic structure is elucidated by Scanning Tunneling Spectroscopy (STS). Recently, STS has exploited quasiparticle interference (QPI) - wave-like electrons scattering off impurities to produce periodic interference patterns - to infer properties of the QP in momentum-space. Surprisingly, some interference peaks in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} (Bi-2212) are absent beyond the antiferromagnetic (AF) zone boundary, implying the dominance of particular scattering process. Here, we show that ARPES sees no evidence of quasiparticle (QP) extinction: QP-like peaks are measured everywhere on the Fermi surface, evolving smoothly across the AF zone boundary. This apparent contradiction stems from different natures of single-particle (ARPES) and two-particle (STS) processes underlying these probes. Using a simple model, we demonstrate extinction of QPI without implying the loss of QP beyond the AF zone boundary.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 969226
• Report Number(s): SLAC-PUB-13845
• Journal Information: Submitted to Nature Physics, Journal Name: Submitted to Nature Physics
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
ELECTRONIC STRUCTURE
FERMI LEVEL
IMPURITIES
MATHEMATICAL MODELS
Other
MATSCI
OTHER
STRONTIUM OXIDES