Crossover from coherent to incoherent electronic excitations in the normal state of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+delta}.
Angle resolved photoemission spectroscopy (ARPES) and resistivity measurements are used to explore the overdoped region of the high temperature superconductor Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}}. We find evidence for a new crossover line in the phase diagram between a coherent metal phase for lower temperatures and higher doping, and an incoherent metal phase for higher temperatures and lower doping. The former is characterized by two well-defined spectral peaks in ARPES due to coherent bilayer splitting and superlinear behavior in the resistivity, whereas the latter is characterized by a single broad spectral feature in ARPES and a linear temperature dependence of the resistivity.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC; NSF
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 961124
- Report Number(s):
- ANL/MSD/JA-44788
- Journal Information:
- Phy. Rev. Lett., Journal Name: Phy. Rev. Lett. Journal Issue: May 23, 2003 Vol. 90; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Anisotropy and dimensional crossover of the vortex state in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} crystals
Overdoped metals in the Tl[sub 2]Ba[sub 2]CuO[sub 6+[delta]] and TlSr[sub 2]CaCu[sub 2]O[sub 7[minus][delta]] systems