English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

To conduct spin-sensitive transport measurements, a non-local device geometryis often used to avoid spurious voltages that are caused by the flow ofcharges. However, in the vast majority of reported non-local spin valve, Hanlespin precession, or spin Hall measurements background signals have beenobserved that are not related to spins. We discuss seven different types ofthese charge-induced signals and explain how these artifacts can result inerroneous or misleading conclusions when falsely attributed to spin transport.The charge-driven signals can be divided into two groups: Signals that areinherent to the device structure and/or the measurement setup and signals thatdepend on a common-mode voltage. We designed and built a voltage-controlledcurrent source that significantly diminishes all spurious voltage signals ofthe latter group in both DC and AC measurements by creating a virtual groundwithin the non-local detection circuit. This is especially important forlock-in-based measurement techniques, where a common-mode voltage can create aphase-shifted, frequency-dependent signal with an amplitude several orders ofmagnitude larger than the actual spin signal. Measurements performed ongraphene-based non-local spin valve devices demonstrate how all spuriousvoltage signals that are caused by a common-mode voltage can be completelysuppressed by such a current source.

Charge-induced artifacts in non-local spin transport measurements: How to prevent spurious voltage signals