> Abstract: [...] These spin-polarized gapless edge states can form within the bulk gap of graphene, attainable by inducing staggered potentials, spin-orbit coupling (SOC) and/or magnetic exchange interactions [17,18,19]. Depending on the respective magnitude of the spin-orbit vs. exchange interactions, these edge states can be chiral or helical [20], allowing for topologically protected spin transport that is expected to be robust against disorder [18].
Are they anyons?
> Remarkably, we experimentally realize the presence of helical states at zero external magnetic field, indicating the emergence of the QSH effect despite the breaking of time-reversal symmetry by the induced magnetism [20,37]. The unprecedented zero-magnetic-field detection of the QSH state in this graphene-based magnetic heterostructure, coexisting with the AH effect, makes this system intriguing for the development of quantum spintronic circuitries.
> Type-III superconductivity is destroyed not by Cooper pair breaking but by vortex proliferation generalizing the Berezinskii-Kosterlitz-Thouless mechanism to any dimension.
westurner•7mo ago
Is hydrogen plasma to remove oxide from graphene oxide wafers a feasible, sustainable alternative to photoresist?
> What types of graphene and other forms of carbon do not conduct electricity, are biodegradable , and would be usable as a graphene PCB for semiconductors and superconductors?
> Graphene Oxide (low cost of production), Graphane (hydrogen; high cost of production), Diamond (lowering cost of production, also useful for NV QC nitrogen-vacancy quantum computing; probably in part due to the resistivity of the molecular lattice),
> How could graphene oxide PCBs be made fire-proof?
Salt; like insulation batting. Maybe even processed brine?
westurner•7mo ago
NewsArticle: "Quantum spin currents in graphene without external magnetic fields pave way for ultra-thin spintronics" https://phys.org/news/2025-06-quantum-currents-graphene-exte...
westurner•7mo ago
Are they anyons?
> Remarkably, we experimentally realize the presence of helical states at zero external magnetic field, indicating the emergence of the QSH effect despite the breaking of time-reversal symmetry by the induced magnetism [20,37]. The unprecedented zero-magnetic-field detection of the QSH state in this graphene-based magnetic heterostructure, coexisting with the AH effect, makes this system intriguing for the development of quantum spintronic circuitries.
westurner•7mo ago
Re: Brandon's Circuit Simulator: https://news.ycombinator.com/item?id=43955906
"Generating and detecting graphene plasmon polaritons with terahertz electronics" https://news.ycombinator.com/item?id=41206079
"Terahertz spectroscopy of collective charge density wave dynamics at the atomic scale" (2024) https://www.nature.com/articles/s41567-024-02552-7 .. "Quantum microscopy study makes electrons visible in slow motion" https://news.ycombinator.com/item?id=40981054
These have no magnetic field? Which type of superconductor is that similar to?
From https://news.ycombinator.com/item?id=41803662 :
> Type-III superconductivity is destroyed not by Cooper pair breaking but by vortex proliferation generalizing the Berezinskii-Kosterlitz-Thouless mechanism to any dimension.
westurner•7mo ago
Re: graphene oxide https://news.ycombinator.com/item?id=43955611 :
> What types of graphene and other forms of carbon do not conduct electricity, are biodegradable , and would be usable as a graphene PCB for semiconductors and superconductors?
> Graphene Oxide (low cost of production), Graphane (hydrogen; high cost of production), Diamond (lowering cost of production, also useful for NV QC nitrogen-vacancy quantum computing; probably in part due to the resistivity of the molecular lattice),
> How could graphene oxide PCBs be made fire-proof?
Salt; like insulation batting. Maybe even processed brine?