论文标题

氢化石墨箔中的磁性和超导性

Magnetism and Superconductivity in Hydrogenated Graphite Foils

论文作者

Gheorghiu, Nadina, Ebbing, Charles R., Haugan, Timothy J.

论文摘要

某些非常规超导体独有的是磁性和超导性的共存。我们以前曾在氢化石墨材料中发现铁磁和超导性。此时,我们提供了类似的以及全新的发现,适用于氢化石墨箔。随着磁场强度的增加,温度依赖性磁化显示出几种重要的跃迁。从Neel顺磁 - 抗铁磁过渡到铁电磁超导体状态,再到轨道上的磁磁性玻璃高温超导体,在TC = 50至60 K处的显性相位,具有临界相位。因此,氢化的低密度碳石墨箔的磁性在建立电子相关性中起着重要作用,其中有些在自然界中是超导的。

Unique to certain unconventional superconductors is the coexistence of magnetism and superconductivity. We have previously found ferromagnetism and superconductivity in hydrogenated graphitic materials. Herein we present similar as well as completely new findings this time applicable to hydrogenated graphite foils. As the strength of the magnetic field is increased, the temperature-dependent magnetization shows several important transitions. From a Neel paramagnetic-antiferromagnetic transition, to a ferromagnetic superconductor state, to an orbital paramagnetic glass high-temperature superconductor with critical temperature for the dominant phase at Tc = 50 to 60 K. The ferromagnetic state is observed up to room temperature. Thus, the magnetism of hydrogenated low-density carbon graphite foils plays an important role in establishing electronic correlations of which some are superconducting in nature.

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