The electric potential difference between one point in the vacuum close to the surface of M1
and another point in the vacuum close to the surface of M2
, where M1
are two uncharged metals brought into contact.
PAC, 1983, 55, 1251. 'Interphases in systems of conducting phases (Provisional)' on page 1257 (https://doi.org/10.1351/pac198355081251)