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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We report transport properties for layered BiCh2-based (Ch = S, Se)superconductors LaO1-xFxBiS2-ySey (x = 0.2, 0.5, y = 0-1.05) and theobservation of weak antilocalization (WAL). Electrical resistivity and Hallcoefficients for the Se-poor samples increase with decreasing temperature. Theincrease becomes less pronounced with increasing Se concentration indicating aloss of insulating behavior. Interestingly, the moderately Se-substitutedsamples exhibit metallic behavior in the high-temperature region and a weakincrease in the resistivity in the low-temperature regions, which indicates theexistence of carrier localization. The heavily Se-substituted compounds showmetallic behavior in the entire-temperature region. Sign changes of the Hallcoefficients are observed for the x = 0.2 samples, which possibly is related toa charge-density wave (CDW). Magnetoresistance measurements indicate that WALis realized in the heavily Se-substituted systems. The WAL behavior is weakenedby the changes in F and Se concentrations. A crossover state of the WAL and WLemerges around the moderately F-doped and Se-free LaO0.8F0.2BiS2. The change ofthe resistivity behavior by the F and Se substitution clearly correlates to thedifference of the magnetoconductance. Moreover, the localization regions of theWAL-WL crossover and weak WAL states are possibly associated with the CDW. Wepropose that the BiCh2-based system is a good platform for studyingrelationship between WAL, superconductivity, and electronic ordering becausethose states are tunable by element substitutions with bulk single crystals.

Weak antilocalization induced by Se substitution in layered BiCh$_2$-based (Ch = S, Se) superconductors LaO$_{1-x}$F$_x$BiS$_{2-y}$Se$_y$