By. Gu et Jr. Shi, ELECTRONIC CONDUCTANCE OF A T-SHAPED WAVE-GUIDE IN LOCAL MAGNETIC-FIELD, International journal of modern physics b, 10(26), 1996, pp. 3583-3594
A theoretical study of the electronic conductance of an electron waveg
uide with a T-stub in local magnetic field is presented. The conductan
ce as a function of Fermi energy and magnetoconductance of a T-stub wi
th various dimensions are calculated. It is found that at low incident
electron energies the conductance is hardly changed with the magnetic
held. At high energies the magnetic field shifts the resonant peaks a
nd enhances the transmission on the average. Oscillatory structures of
the magnetoconductance present for a T-stub with larger area while sm
ooth curves exist for a stub with smaller area. Intuitive interpretati
ons are given in terms of magnetic induced quasibound states and antir
esonant reflections. The possibility of a magnetically controlled meso
scopic device is discussed.