We studied the canonical structure of 2D $F(R)$ gravity. Its equivalence with Jackiw-Teitelboim gravity is demonstrated when no matter presents. Then, due to AdS$_2$/CFT$_1$ correspondence, such equivalent Sachdev-Ye--Kitaev models. The singular $D\to 2$ limit also studied. It shown that in a correspondence not realized.

Cobalt-free, single crystal layered-oxide positive electrode materials like Li 1+x [Ni 0.6 Mn 0.4 ] 1−x O 2 (NM64) have received recent interest because of their low cost, high-voltage stability, and good cycle life. In this work, NM64 is successfully produced with a simple all-dry synthesis process that requires no water, intermediate chemicals, produces little waste. The synthesized has ≤ 4% ...

Repeated uniform switching of the magnetization thin films ferrimagnetic amorphous Gd x (FeCo) 1?x in response to single fast laser pulses is well established. Here, we report unusual toggle sperimagnetic Dy Co and Tb with ? 0.25 irradiated 200 fs 800 nm light. The samples have strong local random anisotropy due non-S state rare earth. compensation temperature ?180 K, their Curie ?500 K. They a...