Electron-tunneling studies of the hexaboride materials SmB6, EuB6, CeB6, and SrB6

被引：22

作者：

Amsler, B

Fisk, Z

Sarrao, JL

von Molnar, S

Meisel, MW

Sharifi, F

机构：

[1] Univ Florida, Dept Phys, Gainesville, FL 32611 USA

[2] Univ Florida, Natl High Magnet Field Lab, Gainesville, FL 32611 USA

[3] Florida State Univ, Dept Phys, Tallahassee, FL 32310 USA

[4] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[5] Florida State Univ, Ctr Mat Res & Technol, Tallahassee, FL 32306 USA

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.57.8747

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a series of tunneling measurements on the hexaboride materials SmB6, EuB6, CeB6, and SrB6. In this group, SmB6, EuB6, and CeB6 possess magnetic moments, whereas SrB6 is nonmagnetic. Our tunneling measurements show an asymmetric conductance, exhibiting a background that grows with energy in all four materials. We find evidence of a partial gap, but with only a small depletion in N(E). Our measurements are consistent with a two-band model in which the band overlap is reduced with decreasing temperature. [S0163-1829(98)03415-8].

引用

页码：8747 / 8750

页数：4

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