Metal-insulator transitions in the kondo insulator FeSi and classic semiconductors are similar

被引：68

作者：

DiTusa, JF

Friemelt, K

Bucher, E

Aeppli, G

Ramirez, AP

机构：

[1] UNIV KONSTANZ, FAK PHYS, D-78434 CONSTANCE, GERMANY

[2] NEC CORP LTD, PRINCETON, NJ 08540 USA

[3] AT&T BELL LABS, LUCENT TECHNOL, MURRAY HILL, NJ 07974 USA

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.78.2831

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed the metal-insulator transition in the strongly correlated insulator FeSi with the chemical substitution of Al at the Si site. The magnetic susceptibility, heat capacity, and field-dependent conductivity are measured for Al concentrations ranging from 0 to 0.08. For concentrations greater than or equal to 0.01 we find metallic properties quantitatively similar to those measured in Si:P with the exception of a greatly enhanced quasiparticle mass. Below 2 K the temperature and field-dependent conductivity can be completely described by the theory of disordered Fermi liquids.

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页码：2831 / 2834

页数：4

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