Spin Aharonov-Bohm effect and topological spin transistor
نویسندگان
چکیده
منابع مشابه
Aharonov-bohm Problem for Spin-1
The basic AB problem is to determine how an unshielded tube of magnetic flux Φ affects arbitrarily long-wavelength charged particles impinging on it. For spin-1 at almost all Φ the particles do not penetrate the tube, so the interaction essentially is periodic in Φ (AB effect). Below-threshold bound states move freely only along the tube axis, and consequent induced vacuum currents supplement r...
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The role of Aharonov-Bohm effect in quantum tunneling is examined when a potential is defined on the S1 and has N -fold symmetry. We show that the low-lying energy levels split from the N -fold degenerate ground state oscillate as a function of the Aharonov-Bohm phase, from which general degeneracy conditions depending on the magnetic flux is obtained. We apply these results to the spin tunneli...
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We present a simple model of transmission across a metallic mesoscopic ring. In one of its arm an electron interacts with a single magnetic impurity via an exchange coupling. We show that entanglement between electron and spin impurity states leads to reduction of Aharonov-Bohm oscillations in the transmission coefficient. The spin-conductance is asymmetric in the flux reversal as opposed to th...
متن کاملQuantum mechanics. Putting a spin on the Aharonov-Bohm oscillations.
Of the many fascinating consequences of quantum mechanics, among the more mysterious ones is the Aharonov-Bohm effect. According to classical physics, a charged particle would be influenced by a magnetic field only if the particle goes through a region in which the magnetic field strength is nonzero. But according to quantum mechanics, if the quantum wave representing the state of a charged par...
متن کاملTransmittance through Aharonov-Bohm Rings: Signature of Spin-Charge Separation
We present numerical calculations concerning the phenomenon of spin-charge separation in low-dimensional strongly correlated electron systems. Specifically, we study the t-J model on a flux-threaded ring connected to semi-infinite free-electron leads. The transmittance through such an Aharonov-Bohm ring shows an interference pattern with characteristic sharp dips at certain flux values, determi...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2010
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.82.195409