Observation of orbital two-channel Kondo effect in a ferromagnetic L10-MnGa film

被引：11

作者：

Zhu, Lijun ^{[1
,2
]}

Woltersdorf, Georg ^{[2
]}

Zhao, Jianhua ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, POB 912, Beijing 100083, Peoples R China

[2] Univ Halle Wittenberg, Inst Phys, von Danckelmann Pl 3, D-06120 Halle, Germany

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

关键词：

2-LEVEL TUNNELING SYSTEMS; POINT-CONTACT; TEMPERATURE; CONDUCTANCE; IMPURITIES; SCATTERING; METALS;

D O I：

10.1038/srep34549

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The experimental existence and stability of the fixed point of the two-channel Kondo (2CK) effect displaying exotic non-Fermi liquid physics have been buried in persistent confusion despite the intensive theoretical and experimental efforts in past three decades. Here we report an experimental realization of the two-level system resonant scattering-induced orbital 2CK effect in a ferromagnetic L1(0)-MnGa film, which is signified by a magnetic field-independent resistivity upturn that has a logarithmic and a square-root temperature dependence beyond and below the Kondo temperature of similar to 14.5 K, respectively. Our results not only evidence the robust existence of orbital 2CK effect even in the presence of strong magnetic fields and long-range ferromagnetic ordering, but also extend the scope of 2CK host materials from nonmagnetic nanoscale point contacts to diffusive conductors of disordered alloys.

引用

页数：7

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