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

The selective cooling of $^{75}$As spins by optical pumping followed byadiabatic demagnetization in the rotating frame is realized in a nominallyundoped GaAs/(Al,Ga)As quantum well. The rotation of 6 kG strong Overhauserfield at the $^{75}$As Larmor frequency of 5.5 MHz is evidenced by the dynamicHanle effect. Despite the presence of the quadrupole induced nuclear spinsplitting, it is shown that the rotating $^{75}$As magnetization is uniquelydetermined by the spin temperature of coupled spin-spin and quadrupolereservoirs. The dependence of heat capacity of these reservoirs on the externalmagnetic field direction with respect to crystal and structure axes isinvestigated. The lowest nuclear spin temperature achieved is 0.54 $\mu$K,which is the record low value for semiconductors and semiconductornanostructures.

Deep optical cooling of coupled nuclear spin-spin and quadrupole reservoirs in a GaAs/(Al,Ga)As quantum well