TY - JOUR
T1 - Three-dimensional electronic structure in highly doped Na xCoO2 studied by angle-resolved photoemission spectroscopy
AU - Arakane, Toshiyuki
AU - Sato, Takafumi
AU - Takahashi, Takashi
AU - Fujii, Takenori
AU - Asamitsu, Atsushi
N1 - Funding Information:
We thank K. Nakayama, T. Qian, S. Raj, K. Ono, and M. Kubota for their help in this experiment. ARPES measurements were carried out at KEK-PF (Proposal no. 2006S2-001). This work was supported by grants from JSPS, MEXT, and CREST-JST of Japan. T.A. thanks JSPS for a financial support.
PY - 2011/5
Y1 - 2011/5
N2 - We have investigated three-dimensional electronic structure for Na xCoO2 (x=0.77 and 0.65) by high-resolution angle-resolved photoemission spectroscopy to study the origin of antiferromagnetic (AF) transition of highly doped NaxCoO2 (x>0.75). The a 1g large hole-like Fermi surface (FS) in x=0.77 shows distinct three-dimensionality along the kz direction, and a three-dimensional small electron pocket appears around Γ point, indicating strong inter-layer electronic correlation. On the other hand, x=0.65 sample does not show three-dimensional behavior. This result indicates that transition of FS as a function of band filling is closely related to the occurrence of the magnetic transition in highly doped NaxCoO2.
AB - We have investigated three-dimensional electronic structure for Na xCoO2 (x=0.77 and 0.65) by high-resolution angle-resolved photoemission spectroscopy to study the origin of antiferromagnetic (AF) transition of highly doped NaxCoO2 (x>0.75). The a 1g large hole-like Fermi surface (FS) in x=0.77 shows distinct three-dimensionality along the kz direction, and a three-dimensional small electron pocket appears around Γ point, indicating strong inter-layer electronic correlation. On the other hand, x=0.65 sample does not show three-dimensional behavior. This result indicates that transition of FS as a function of band filling is closely related to the occurrence of the magnetic transition in highly doped NaxCoO2.
KW - C. Photoelectron spectroscopy
KW - D. Fermi surface
KW - D. Spin-density waves
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U2 - 10.1016/j.jpcs.2010.10.047
DO - 10.1016/j.jpcs.2010.10.047
M3 - Article
AN - SCOPUS:79955782287
SN - 0022-3697
VL - 72
SP - 552
EP - 555
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 5
ER -