Spin and charge excitations in optimally doped Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8-delta}.

Journal Article · Thu Jan 01 04:00:00 EST 1998 · J. Phys. Chem. Solids

DOI:https://doi.org/10.1016/S0022-3697(98)00156-5· OSTI ID:942797

Rubhausen, M; Guptasarma, P; Hinks, D G; Klein, M V

We present Raman spectra of low and high-energy charge and spin excitations in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8-{delta}} single crystals with an optimized critical temperature of 95 K. The prominent feature of the high-energy background at around 250 meV is a rearrangement of spectral weight in B{sub 1g} and A{sub 1g}+B{sub 2g} symmetry below the critical temperature, similar to the observations in underdoped and optimally doped Y-123 compounds. In the low-energy region, which is influenced by the effects at higher energies, a gap feature in B{sub 1g} symmetry is observed yielding a value for the magnitude of the superconducting order parameter of A=34 meV. This gap feature is influenced by the orthorhombicity of the crystals and except for a small loss of spectral weight below 25 meV, no gap feature is visible in A{sub 1g} scattering geometry.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 942797
• Report Number(s): ANL/MSD/JA-34683
• Journal Information: J. Phys. Chem. Solids, Journal Name: J. Phys. Chem. Solids Journal Issue: 10-12 ; 1998 Vol. 59; ISSN 0022-3697; ISSN JPCSAW
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRYSTAL DOPING
EXCITATION
ORDER PARAMETERS
RAMAN SPECTRA
SPIN
STRONTIUM OXIDES