Persistent currents with long-range hopping in 1D single-isolated-diffusive rings
نویسندگان
چکیده
منابع مشابه
Universal persistent currents in mesoscopic metal rings due to long-range Coulomb interactions.
We calculate the average persistent current in a mesoscopic metal ring threaded by a magnetic flux in the diffusive regime. It is shown that the classical electromagnetic energy leads to a universal average current of the order of αec/C0, where α is the fine structure constant, −e is the charge of the electron, c is the velocity of light, and C0 is the classical capacitance of the ring. Strikin...
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We study effects of local electron interactions on the persistent current of one dimensional disordered rings. For different realizations of disorder we compute the current as a function of Aharonov-Bohm flux to zeroth and first orders in the Hubbard interaction. We find that the persistent current is enhanced by onsite interactions. Using an avoided level crossings approach, we derive analytic...
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We show that at low temperatures T an inhomogeneous radial magnetic field with magnitude B gives rise to a persistent magnetization current around a mesoscopic ferromagnetic Heisenberg ring. Under optimal conditions, this spin current can be as large as gmicro(B)(T/ variant Planck's over 2pi )exp([-2pi(gmicro(B)B/delta)(1/2)], as obtained from leading-order spin-wave theory. Here g is the gyrom...
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ژورنال
عنوان ژورنال: Synthetic Metals
سال: 2005
ISSN: 0379-6779
DOI: 10.1016/j.synthmet.2005.09.030