Persistent Currents in Continuous One-Dimensional Disordered Rings within the Hartree–Fock Approximation
نویسندگان
چکیده
منابع مشابه
Persistent Currents in 1 D Disordered Rings of Interacting Electrons
(Received) We calculate the persistent current of 1D rings of spinless fermions with short-range interactions on a lattice with up to 20 sites, and in the presence of disorder, for various band fillings. We find that both disorder and interactions always decrease the persistent current by localizing the electrons. Away from half-filling, the interaction has a much stronger influence in the pres...
متن کاملOn the role of electron correlation and disorder on persistent currents in isolated one-dimensional rings
To understand the role of electron correlation and disorder on persistent currents in isolated 1D rings threaded by magnetic flux φ, we study the behavior of persistent currents in aperiodic and ordered binary alloy rings. These systems may be regarded as disordered systems with well-defined long-range order so that we do not have to perform any configuration averaging of the physical quantitie...
متن کاملPersistent spin currents in mesoscopic Heisenberg rings.
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...
متن کاملPersistent currents in carbon nanotubes based rings
Persistent currents in rings constructed from carbon nanotubes are investigated theoretically. After studying the contribution of finite temperature or quenched disorder on covalent rings, the complexity due to the bundle packing is addressed. The case of interacting nanotori and self-interacting coiled nanotubes are analyzed in details in relation with experiments.
متن کاملPersistent currents in carbon nanotube based rings
Carbon nanotubes are micrometer-long hollow cylinders with nanometer scale radii, and electronic properties strongly depending on their geometrical helicity. As promising tools for building up nanoscale electronic devices, nanotubes also allow one to challenge the well established common theories of mesoscopic physics. Recently, many works of quantum transport in these systems have revealed puz...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Modern Physics B
سال: 1997
ISSN: 0217-9792,1793-6578
DOI: 10.1142/s0217979297000964