Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Vagner, I. D."'
Publikováno v:
Low Temp. Phys. 25, 541 (1999)
We present a detailed theory of induced persistent current produced by hyperfine interaction in mesoscopic rings based on a 2D-electron (hole) gas in the absence of external magnetic field. The persistent current emerges due to combined action of the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0512044
It is shown that the collective spin rotation of a single Skyrmion in quantum Hall ferromagnet can be regarded as precession of the entire spin texture in the external magnetic field, with an effective moment of inertia which becomes infinite in the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0311239
Publikováno v:
Physica E 24, 82 (2004)
Properties of a Nuclear-Spin-Polarization-Induced Quantum Ring (NSPI QR) are studied theoretically. In the proposed system a local nuclear spin polarization creates an effective hyperfine field which confines the electrons with the spins opposite to
Externí odkaz:
http://arxiv.org/abs/cond-mat/0309390
A coherent superposition of many nuclear spin states can be prepared and manipulated via the hyperfine interaction with the electronic spins by varying the Landau level filling factor through the gate voltage in appropriately designed Quantum Hall Fe
Externí odkaz:
http://arxiv.org/abs/cond-mat/0303394
Publikováno v:
Physical Review B 66, 052508 (2002)
We analyze new spin effects in current-carrying state of superconductor-2D electron gas-superconductor (S-2DEG-S) device with spin-polarized nuclei in 2DEG region. The hyperfine interaction of 2D electrons with nuclear spins, described by the effecti
Externí odkaz:
http://arxiv.org/abs/cond-mat/0203447
We present a theoretical study of the influence of the nuclear ferromagnetism on superconductivity in the presence of the electron-nuclear spin interaction. It is demonstrated that in some metals, e.g. Rh, W, the BCS condensate imbedded in a matrix o
Externí odkaz:
http://arxiv.org/abs/cond-mat/0112286
Publikováno v:
Phys. Rev. B 66, 035303 (2002)
Electron transport in a new low-dimensional structure - the nuclear spin polarization induced quantum wire (NSPI QW) is theoretically studied. In the proposed system the local nuclear spin polarization creates the effective hyperfine field which conf
Externí odkaz:
http://arxiv.org/abs/cond-mat/0109459
Publikováno v:
Physica E (2002), 14, 361-365
Spatially nonhomogeneously spin polarized nuclei are proposed as a new mechanism to monitor electron states in a nanostructure, or as a means to createn and, if necessary, reshape such nanostructures in the course of the experiment. We found that a p
Externí odkaz:
http://arxiv.org/abs/cond-mat/0109271
Publikováno v:
Physical Review B (2002), 65, 165313
A theory of magnetic impurities in a 2D electron gas quantized by a strong magnetic field is formulated in terms of Friedel-Anderson theory of resonance impurity scattering. It is shown that this scattering results in an appearance of bound Landau st
Externí odkaz:
http://arxiv.org/abs/cond-mat/0106339
The idea of quantum computation is the most promising recent developments in the high-tech domain, while experimental realization of a quantum computer poses a formidable challenge. Among the proposed models especially attractive are semiconductor ba
Externí odkaz:
http://arxiv.org/abs/cond-mat/0102228