Y. Furubayashi et al., Epitaxial growth of single-crystalline thin film of Ca14Cu24O41: A heavilyhole-doped two-legged spin ladder, PHYS REV B, 60(6), 1999, pp. R3720-R3723
We have succeeded in growing a single-crystalline thin film of Ca14CU24O41.
a two-legged ladder oxide, on a Sr14CU24O41 (010) single-crystal substrate
. The epitaxial growth without any misorientation with the substrate was co
nfirmed and the lattice spacings were determined by using refection high-en
ergy electron diffraction and x-ray diffraction. The film oxidized using oz
one showed a T-linear metallic resistivity along the ladder direction down
to 20 K, whereas the resistivity normal to the ladder remained semiconducti
ve in the whole temperature range. The anisotropy monotonously increased as
3x10(2)? at 20 K and 10(3) at 2 K. No superconducting;ducting transition e
merged. The heavily hole-doped two-legged ladders created in the film will
provide us with an opportunity to study further the quasi-one-dimensional c
harge dynamics down to low temperatures. [S0163-1829(99)50430-X].