Atsushi Fujimori University of Tokyo Self-energy from the low to high energy scales in the correlated metal SrVO 3 International Workshop on Strong Correlations and Angle-Resolved Photoemission Spectroscopy, 29 July – 2 August 2013, DESY, Hamburg, Germany Thin film growth and ARPES T. Yoshida*, K. Yoshimatsu**, S. Aizaki, M. Takizawa (U of Tokyo) H. Kumigashira, K. Horiba, K. Ono (KEK-PF) M. Oshima (U of Tokyo) Single crystals H. Eisaki (AIST) DFT calc. P. Mahadevan, K. Gupta (S. N. Bose Inst.) DMFT calc. M.J. Rozenberg, G. Sordi (CNRS) Present addresses: *Kyoto U, **Tokyo Inst of Technology Supported by a Grant-in-Aid for Scientific Research S (JSPS)
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International Workshop on Strong Correl ations and Angle-Resolved
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Atsushi Fujimori University of Tokyo
Self-energy from the low to high energy scales in the correlated metal SrVO3
International Workshop on Strong Correlations and Angle-Resolved Photoemission Spectroscopy, 29 July – 2 August 2013, DESY, Hamburg, Germany
Thin film growth and ARPES T. Yoshida*, K. Yoshimatsu**, S. Aizaki, M. Takizawa (U of Tokyo)H. Kumigashira, K. Horiba, K. Ono (KEK-PF) M. Oshima (U of Tokyo)Single crystals H. Eisaki (AIST)DFT calc. P. Mahadevan, K. Gupta (S. N. Bose Inst.)DMFT calc. M.J. Rozenberg, G. Sordi (CNRS)
Present addresses: *Kyoto U, **Tokyo Inst of TechnologySupported by a Grant-in-Aid for Scientific Research S (JSPS)
kFkF
A. Damascelli et al., Rev. Mod. Phys. 2001
Quasi-particle (QP)peak
A(k,)
Band structure
A(k,)
Band electron Correlated electron
Spectral function A(k,) of correlated Fermi liquid
Incoherent part
coherent part(quasi-particle bands)
U
W
W. Metzner and D. Vollhardt, PRL ‚89X.Y. Zhang, M.J. Rozenberg and G. Kotliar, PRL ‘93
Incoherent part(Hubbard bands)
U / W <<1
U / W >1
Dynamical mean field theory (DMFT) of Mott-Hubbard system
W*
Spectral weight 1-z : z
W* = zW
m* 1/W* 1/vF* 1/z
LHB UHB
Bandwidth- and filling-controlled metal-insulator transition
1
Filling-controlled MIT
M. Imada, A. Fujimori and Y. Tokura, Rev. Mod. Phys. 1998
U/W or /W ~ 1
INTE
RA
CTI
ON
STR
ENG
THU
/Wor
/W
n
Bandwidth-controlled MITSrVO3
CaVO3
M. Onoda et al., Solid State Commun. ‘91
Fermi-liquid behaviors of Ca1-xSrxVO3
Electrical resistivity
Ca1-xSrxVO3
I.H. Inoue et al., PRB ‘95
Specific heat
2/ TTcp
SrVO3
CaVO3
H.I. Inoue et al., PRL ‘95
Coherent partIncoherent part(LHB)
Photoemission spectra of the bandwidth-controlled d1 system Ca1-xSrxVO3
SrVO3
CaVO3
A. Sekiyama et al., PRL ‘04
Soft x-ray photoemission
7.1~coh
b
WW
LDA
WbWcoh
2~*
b
Bandwidth Electronic specific heat
Difference between SrVO3 and CaVO3
K. Maiti et al., PRB ‘06
Extraction of bulk spectra
LDA+DMFT calc for SrVO3 and CaVO3
E. Pavarini et al., PRL 04
LDA calculation
LDA+DMFT calculation
H.I. Inoue et al., Phys. Rev. Lett. ‘02
1.5
1.0
0.5
0
-0.5
-1.0
Energ
y (e
V)
43210 X M R ...)cos(cos akaktk yxdxy
X M
R
K. Takegahara et al., J. Electron Spectrosc. 1994
T. Yoshida et al., Phys. Rev. Lett. 2005
dzx
dyz
dxy
...)cos(cos akaktk zydyz ...)cos(cos akaktk xzdzx
EF
Band structure and Fermi surfaces of SrVO3, CaVO3 (d1)
Fermi surfaces
Fermi surfaces of bulk SrVO3 and CaVO3
Secondarycone
dxy
dyz dzxdxy
dyz
T. Yoshida et al., PRB ‘10
ARPES spectra of SrVO3 and CaVO3
SrVO3 CaVO3
Coherent part
Incoherentpart
Coherent part
Incoherentpart
dxydzx dxydzx
T. Yoshida et al., PRB ‘10
ky ky
dyz dyz
Band dispersions
2.1)SrVO(*)CaVO(*
3
3 mm
8.0)SrVO(*)CaVO(*
3F
3F vv
,2* 1 zmm
b
5.0*
F
F zv
v
Outline
• k-dependence of the spectral function and the self-energy
• Self-energy near EF
• Self-energy including Hubbard features
• Remant of ReG(k,)=0 bands
k-dependence of the spectral function and the self-energy
Bulk SrVO3: a = 3.84 ÅK. Yoshimatsu et al.
Epitaxially grown SrVO3 thin film on SrTiO3(001) substrate