Strain-modified RKKY interaction in carbon nanotubes

Abstract

For low-dimensional metallic structures, such as nanotubes, the exchange coupling between localized magnetic dopants is predicted to decay slowly with separation. The long-range character of this interaction plays a significant role in determining the magnetic order of the system. It has previously been shown that the interaction range depends on the conformation of the magnetic dopants in both graphene and nanotubes. Here we examine the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in carbon nanotubes in the presence of uniaxial strain for a range of different impurity configurations. We show that strain is capable of amplifying or attenuating the RKKY interaction, significantly increasing certain interaction ranges, and acting as a switch: effectively turning on or off the interaction. We argue that uniaxial strain can be employed to significantly manipulate magnetic interactions in carbon nanotubes, allowing an interplay between mechanical and magnetic properties in future spintronic devices. We also examine the dimensional relationship between graphene and nanotubes with regards to the decay rate of the RKKY interaction.

Kondo effect and enhanced magnetic properties in gadolinium functionalized carbon nanotube supramolecular complex

“…The functionalized MWNTs have a Weiss temperature of −413 K. In general, the antiferromagnetic exchange requires the existence of interaction between spin sublattices of different spin orientation which in this system are likely due to the DTPA complex and itinerate electrons of the MWNTs which mediate the antiferromagnetism via the Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction. RKKY has been reported in other magnetized carbon systems and it is a well-established fundamental interaction in spin polarized environments 43 , 44 . The inverse susceptibility plot was also used to determine the Kondo temperature T K for this nanocomposite.…”

Symmetries and hybridization in the indirect interaction between magnetic moments inMoS2nanoflakes

“…41,42 The plaquette configuration has been analyzed in 2D graphene, 50,52-54 triangular flakes, 47,48 and carbon nanotubes. 55,56 The effective interaction has been also studied in other systems with large intrinsic SOC, such as silicine, 57,58 and Pt lattices.…”

Symmetries and hybridization in the indirect interaction between magnetic moments in MoS$_{2}$ nanoflakes

“…41,42 The plaquette configuration has been analyzed in 2D graphene, 50,[52][53][54] triangular flakes, 47,48 and carbon nanotubes. 55,56 The effective interaction has been also studied in other systems with large intrinsic SOC, such as silicine, 57,58 and Pt lattices. 59 Finite TMD samples exhibit highly localized states near the edges of the flake, [60][61][62][63][64] resulting in noncolinear and tunable long range interactions when the impurities sit at these edges, and with slow decay with the impurity separation.…”