Supplemental Material to “ Unconventional dc Transport in Rashba Electron Gases ”
نویسندگان
چکیده
To fix the notation, let us start by giving some details on the helicity eigenstates basis. The helicity operator is defined as S = [p̂⇥ ~ ]z and its eigenstates, |ksi, with s = ±1, satisfy the relation S|k±i = ±|k±i. A simple calculation shows in particular that |k±i can be expressed in terms of the standard spin eigenstates, |k "i and |k #i, as |k±i = (exp ( i✓k)|k "i± i|k #i)/ p 2 with ✓k = arctan(ky/kx). Consequently, the matrix Uk which implements the rotation from the spin to the helicity eigenstates basis has the form
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Unconventional dc Transport in Rashba Electron Gases.
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