CCoO6 Co

Ba3Co2O6(CO3)0.7

c=9.518 a=b=9.683

cccccccccccccccccccccccccccccc

Ba326のARPES 2014/4/7 Progress Report Ito

CoO6

K. Igarashi et al. , J. Phys.: Conf. Ser. 400,

032024 (2012).

// ( ) Ba3Co2O6(CO3)0.7

3D ARPES endstation @BL5U UVSOR-III

Ba3Co2O6(CO3)0.7

θa*

b´

a c

hν

c*

c*

b´*

Σ

Γ

M

Δ

U

T

ΓΓΓMM

AAAA

* L L

H HK

L

AAAAAAL

H HK

MMMΓ

LLLLALLLLLL

A

c*

Δ

c*

U

b´*

T

a*

Σ

c*

Δ

c*

U

b´*

T

a*

Σ

******************

一次元金属鎖 一次元半導体鎖

c*EF

kF kF

c*EF

VBM

(VB)

kVBM kVBM

V0

ρΔE//=5.4meV

300 200 100 EF -100 Binding Energy (meV)

20~30meV ΔE( )

EFEF

20meV

c* U

300 200 100 EF -100 Binding Energy (meV)

c* U

Ba3Co2O6(CO3)0.7CoO6

ΔTCO3