Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1819892 | Physica C: Superconductivity and its Applications | 2007 | 4 Pages |
Abstract
We have performed STM measurements of the modulation-free Pb-doped Bi2201. In the overdoped (Tc = 7 K) and the optimally doped (Tc = 22 K) samples, the distorted patch arrangement has been observed in low-bias STM images below 50 mV. With decreasing doping level, the size of patches becomes smaller and their arrangement more orderly. In the optimally doped sample, furthermore, the bright atomic-strings have been detected at low bias-voltages below 10 mV. The distorted patch arrangement may be regarded as the two-dimensional superstructure incompletely formed due to the absence of the structural modulation and/or the disturbance from doped holes. The atomic-string indicates the one-dimensional electronic correlation and may be the new type hidden order.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
K. Kudo, T. Nishizaki, N. Okumura, N. Kobayashi,