(a) Schematic illustration of the inverse spin valve. and are nonmagnetic metals. HM is a ferromagnetic half metal. is the applied bias. (b) Electron flow from and into spin-up and spin-down states in and . In the steady state, current flowing into any reservoir should be equal to those flowing out. (c) Relative chemical potentials of spin-up and spin-down electrons in nonmagnetic metals and half metal. The curved arrows indicate the electron flow. Dash lines indicate the chemical potential levels of spin-up and spin-down electrons in half metal and nonmagnetic metals. and are the chemical potential splits between spin-up and spin-down electrons at the left and right nonmagnetic-magnetic interfaces. is the effective bias on the half metal.