Not content with going clockwise, he slurrs the car into an opposite spin.

In the case of two electrons occupying the same orbital, the Pauli principle demands that they have opposite spin.

But if later on someone measures the other one, it must "decide" to show itself as having the opposite spin.

The electrons can pair up with opposite spin in one MO leaving the other empty.

But the new superconductors are called antiferromagnets; every other copper atom has the opposite spin.

It proposes that electrons with opposite spin can become paired, forming Cooper pairs.

Note that each orbital can hold two electrons of opposite spin.

Thus there are two conducting channels and each band accommodates two electrons of opposite spin.

The Mayor's Democratic rivals put the opposite spin on the same numbers.

This means that every k-state in the gas can only be occupied by two electrons with opposite spin.