Bobby Moynihan. Watch yo self!
Recent progress in understanding the topological properties of condensed matter has led to the discovery of time-reversal invariant topological insulators. Because of limitations imposed by nature, topologically non-trivial electronic order seems to be uncommon except in small-band-gap semiconductors with strong spin-orbit interactions. In this Article we show that artificial electromagnetic structures, known as metamaterials, provide an attractive platform for designing photonic analogues of topological insulators. We demonstrate that a judicious choice of the metamaterial parameters can create photonic phases that support a pair of helical edge states, and that these edge states enable one-way photonic transport that is robust against disorder.
The integer and fractional quantum Hall states are known to break down at high dc bias, exhibiting deviation from the ideal incompressible behavior. We measure breakdown of the \nu = 2, 3, 4, 5 integer and the \nu = 4/3 and 5/3 fractional states in a quantum point contact (QPC) of lithographic width ~600 nm. Dependence of the critical current on magnetic field, QPC gate voltage, and QPC width are presented. Of particular interest, the critical current of the 4/3 and 5/3 fractional states shows the opposite dependence on QPC width compared to the integer states. This previously unobserved result is not explained by current theories of breakdown.
A very specific long-term commitment to a Cosby impersonation!
I’ve just got time for a quick post! —Raspberry Popsicles.
I’ve been on a dessert kick lately, and I’m not mad about it. I don’t have any fancy Popsicle-making molds. So I opted for straws and shot glasses. hey, it worked.
Take 2 pints raspberries, semi-frozen, pulse in a food processor. Then mix in 1/3 C simple syrup. Mold and freeze!
Enjoy the rest of your weekend, I’m off to enjoy some grapefruit margaritas :)
- DEADLEE is an awesome openly gay rapper and actor. I wuv him!
He’s a really down to earth 100% real Dude
Season 3, Episode 19: “The Shower”
Cliff has been banished from Denise’s friend’s bridal shower and he is very upset. But at least he looks good! His comb sweater is amazing!
I’ve noticed that when my son doesn’t have a diaper on I’m much less likely to tickle him. It just doesn’t feel safe.