Reconstructed Fermi surface of underdoped Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8}+{delta} cuprate superconductors.

Journal Article · Wed Jul 20 04:00:00 EDT 2011 · Phys. Rev. Lett.

DOI:https://doi.org/10.1103/PhysRevLett.107.047003· OSTI ID:1021326

Yang, H -B; Rameau, J D; Pan, Z -H; Gu, G D; Johnson, P D; Claus, H; Hinks, D G; Kidd, T E ^[1]

---

1. Materials Science Division

The Fermi surface topologies of underdoped samples of the high-T{sub c} superconductor Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} have been measured with angle resolved photoemission. By examining thermally excited states above the Fermi level, we show that the observed Fermi surfaces in the pseudogap phase are actually components of fully enclosed hole pockets. The spectral weight of these pockets is vanishingly small at the magnetic zone boundary, creating the illusion of Fermi 'arcs.' The area of the pockets as measured in this study is consistent with the doping level, and hence carrier density, of the samples measured. Furthermore, the shape and area of the pockets is well reproduced by phenomenological models of the pseudogap phase as a spin liquid.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; Iowa Office of Energy Indpendence Grant
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1021326
• Report Number(s): ANL/MSD/JA-70654
• Journal Information: Phys. Rev. Lett., Journal Name: Phys. Rev. Lett. Journal Issue: Jul. 20, 2011 Vol. 107; ISSN 0031-9007
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
CALCIUM OXIDES
CARRIER DENSITY
COPPER OXIDES
CUPRATES
EXCITED STATES
FERMI LEVEL
HIGH-TC SUPERCONDUCTORS
HOLES
PHOTOEMISSION
SHAPE
SPIN
STRONTIUM OXIDES
WEIGHT