TY - JOUR
T1 - STM studies on the hole doping dependence of the hidden order in Pb-doped Bi2201
AU - Kudo, K.
AU - Nishizaki, T.
AU - Okumura, N.
AU - Kobayashi, N.
N1 - Funding Information:
We thank Y. Murakami for EPMA at the Advanced Research Center of Metallic Glasses, IMR, Tohoku University. This work was partly supported by a Grant-in-Aid for Scientific Research on Priority Areas (No. 451) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, by a Grant-in-Aid for Young Scientists (B) from MEXT, Japan and also by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science.
PY - 2007/10/1
Y1 - 2007/10/1
N2 - 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.
AB - 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.
KW - Bi-based cuprates
KW - Hidden order
KW - Modulation-free
KW - Pb-doped Bi2201
KW - Scanning tunneling microscopy
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U2 - 10.1016/j.physc.2007.04.226
DO - 10.1016/j.physc.2007.04.226
M3 - Article
AN - SCOPUS:34548485602
VL - 463-465
SP - 40
EP - 43
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - SUPPL.
ER -