INTERPRETATION OF THE THERMOPOWER MEASUREMENTS OF YBA2CU3OX WITH 6-GREATER-THAN-X-GREATER-THAN-7 AND 400-DEGREES-C-GREATER-THAN-T-GREATER-THAN-900-DEGREES-C

被引：6

作者：

MARUCCO, JF

POUMELLEC, B

机构：

[1] C.N.R.S. URAD 0446-Lab. des composes non-stoechiometriques, UPS Orsay

来源：

PHYSICA C | 1990年 / 165卷 / 02期

关键词：

D O I：

10.1016/0921-4534(90)90169-F

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The themopower has been measured in YBa2Cu3Ox together with the conductivity. Although, it is positive in the whole range of oxygen composition, it shows a tendency to a n-p inversion for low oxygen content. A good fit was obtained by assuming • -first: a metallic conductivity of the linear chains for x=7; • -second: a hopping electron motion for low oxygen content; • -third: a strong localization of half of the hole content; • -fourth: a gap of about 0.8eV between the Cu3d10 band states and the upper Hubbard band of the 3d9 fifthly coordinated copper. © 1990.

引用

页码：205 / 211

页数：7

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