Search for Competing Order-parameters in Cuprates

1
Search for Competing Order-parameters in
Cuprates using FT-STS J. E. Hoffman, K.
McElroy, E.W. Hudson, H Eisaki, S. Uchida J. C.
Seamus Davis
dI/dV spectra on Bi2Sr2CaCu2O8x surface in B7
Tesla
Background Common Phenomenology of Vortex Cores
in HTSC
7 meV LDOS

• I. Maggio-Aprile et al., Phys. Rev. Lett. 75,
  2754 (1995)

30 nm
Pan, PRL 85, 1536 (2000)

• S. H. Pan et al., Phys. Rev. Lett. 85, 1536
  (2000)

Topographies
Reproducibility of vortex data
E 12 meV
B 0 T
B 5 T
B 0 T
B 5 T
0.5 Ni-doped BSCCO
0.6 Zn-doped BSCCO
1.1 Å
x
y
0 Å
Raw data 7 meV LDOS 560 Å x 560 Å
Raw data 8 meV LDOS 565 Å x 565 Å
Vortex-induced LDOS (5 Tesla)
Fourier Transform of Vortex LDOS map
Data
Schematic
supermodulation
vortex induced LDOS
Bi and Cu atoms
Science 266, 455 (2002)
Science 266, 455 (2002)
Coexisting SDW/CDW ?
Research Support