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Page 1: E.!¢j Z HK

“Metallic Quantum Well States in Artificial Structures of

Strongly Correlated Oxide”

Page 2: E.!¢j Z HK

Tcmax = -235 C° Tc

max = -178 C° Tcmax = -163 C°

Tcmax

Page 3: E.!¢j Z HK

n = 1 n = 2 n = 3

SrVO3

SrVO3

SrVO3

e-

Page 4: E.!¢j Z HK
Page 5: E.!¢j Z HK

用語説明:「強相関電子」

e-

e-

e-

e-

e-

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用語説明:「量子井戸」

n = 1 n = 2 n = 3

e-

Page 7: E.!¢j Z HK

高温超伝導体の結晶構造

Tcmax

Tcmax = -235 C° Tc

max = -178 C° Tcmax = -163 C°

Page 8: E.!¢j Z HK

z

ABO3

ABO3

ABO3

ABO3

ABO3

ABO3

AO

AO

SrVO3

SrVO3

SrVO3

A: Sr, La

B: Cu, Mn

O:

層状結晶構造と今回作製した量子井戸構造の類似性

Page 9: E.!¢j Z HK

n = 1 n = 2 n = 3

SrVO3

SrVO3

SrVO3

e-

作製した量子井戸構造の特長

Page 10: E.!¢j Z HK

n = 1 n = 2 n = 3

SrVO3

SrVO3

SrVO3

e-

作製した量子井戸構造の特長

SrVO3

Page 11: E.!¢j Z HK

n = 1 n = 2 n = 3

SrVO3

SrVO3

SrVO3

作製した量子井戸構造の特長

e-

n = 4

SrVO3

SrVO3

Page 12: E.!¢j Z HK

作る技術:レーザー分子線エピタキシー装置

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作る技術:原子レベルで平坦な表面と急峻な界面

μ μ

基板

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レーザー分子線エピタキシー& 光電子分光複合装置

PF

BL28A

見る技術:

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PF

実験装置の写真

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見る技術:角度分解光電子分光測定

PF

BL28A

e-

SrVO3

&

Page 17: E.!¢j Z HK

SrVO3

SrVO3

SrVO3

デジタル化(量子化)状態の観測

n = 1 n = 2 n = 3

m

Page 18: E.!¢j Z HK

量子井戸内での強相関電子の振る舞い

SrVO3

dxydxz dyz dxz

dyz

dxz

n = 1

n = 2

n = 3

n = 3

n = 2

n = 1

SrVO3

Page 19: E.!¢j Z HK

x

y

z

dxydxz dyz

n = 1

n = 2

n = 3

軌道選択的量子化

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n = 1

n = 2

n = 3

量子化状態の質量増強

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室温超伝導へむけて!

Tcmax = 38 K Tc

max = 95 K Tcmax = 110 K

Tcmax

Page 22: E.!¢j Z HK

A19684010 S22224005

JST

CREST KEK

08S2-003 09S2-005

Page 23: E.!¢j Z HK

113-8656 - -

Tel 03-5841-7192

Fax 03-5841-8744

E-mail: [email protected]