Abstract

The behavior of manganese impurity in three-dimensional Dirac semimetal Cd₃As₂ has been studied using the electron paramagnetic resonance (EPR) method and electromagnetic measurements. It is found that, in contrast to doping with europium, doping with manganese (as well as iron) does not change the sign of magnetoresistance, which is almost completely suppressed at high manganese concentrations. At the same time, the character of the magnetic-field influence on the contact potential changes. The values of g factors measured using EPR coincide with those of a free electron at all temperatures, which indicates (taking into account the fluctuation behavior of the EPR linewidth and reduced magnetic moment at Mn²⁺) the formation of short-lived bound states of the Mn²⁺ ion and conduction electrons—antiferromagnetic polarons.

中文翻译：

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EPR数据显示3D Dirac半金属α-Cd3 As 2中Mn 2+离子的行为特征

摘要

使用电子顺磁共振（EPR）方法和电磁测量研究了三维Dirac半金属Cd ₃ As ₂中锰杂质的行为。已经发现，与掺杂euro相反，掺杂锰（以及铁）不会改变磁致电阻的迹象，在高锰浓度下几乎完全被抑制。同时，磁场特性对接触电势的影响发生变化。使用EPR测量的g因子的值与所有温度下的自由电子的g因子值一致，这表明（考虑到EPR线宽的波动行为和Mn ²⁺处的磁矩减小）形成Mn ²⁺离子和导电电子（反铁磁极化子）的短寿命结合态。