Zobrazeno 1 - 10
of 621
pro vyhledávání: '"Johannesson, H"'
Publikováno v:
Phys. Rev. B 102, 205420 (2020)
A class of Aubry-Andr\'e-Harper models of spin-orbit coupled electrons exhibits a topological phase diagram where two regions belonging to the same phase are split up by a multicritical point. The critical lines which meet at this point each defines
Externí odkaz:
http://arxiv.org/abs/2008.08158
Publikováno v:
Phys. Rev. B 96, 205135 (2017)
We propose a spin valve device based on the interplay of a modulated spin-orbit interaction and a uniform external magnetic field acting on a quantum wire. Half-metal phases, where electrons with only a selected spin polarization exhibit ballistic co
Externí odkaz:
http://arxiv.org/abs/1709.02217
Autor:
Zvyagin, A. A., Johannesson, H.
Publikováno v:
Phys. Rev. B 89, 205135 (2014)
We introduce an integrable model of spin-polarized interacting electrons subject to a spin-conserving spin-orbit interaction. Using Bethe Ansatz and conformal field theory we calculate the exact large-time single-electron and density correlations and
Externí odkaz:
http://arxiv.org/abs/1403.6091
Publikováno v:
J. Phys.: Conf. Ser. 532, 012012 (2014)
The Richardson-Gaudin model describes strong pairing correlations of fermions confined to a finite chain. The integrability of the Hamiltonian allows for its eigenstates to be constructed algebraically. In this work we show that quantum group theory
Externí odkaz:
http://arxiv.org/abs/1402.4838
Publikováno v:
J. Magn. Magn. Mat. 272-276, e103 (2004)
The two-channel Anderson impurity model serves as a prototype for describing heavy-fermion materials with a possible mixed-valent regime with both quadrupolar and magnetic character. We report on the low-energy physics of the model, using a conformal
Externí odkaz:
http://arxiv.org/abs/cond-mat/0502646
Publikováno v:
Phys. Rev. B 71, 195107 (2005)
We compute exactly the low-energy single-electron Green's function, the impurity and electron self-energies, and the resistivity for the two-channel Anderson impurity model. These results are obtained by exploiting the boundary conformal field theory
Externí odkaz:
http://arxiv.org/abs/cond-mat/0411533
Autor:
Johannesson, H., Japaridze, G. I.
Publikováno v:
Phys. Rev. B 68, 214507 (2003)
We study a one-dimensional electron liquid embedded in a 2D antiferromagnetic insulator, and coupled to it via a weak antiferromagnetic spin exchange interaction. We argue that this model may qualitatively capture the physics of a single charge strip
Externí odkaz:
http://arxiv.org/abs/cond-mat/0301585
Publikováno v:
Phys. Rev. B 68, 075112 (2003)
We construct the boundary conformal field theory that describes the low-temperature behavior of the two-channel Anderson impurity model. The presence of an exactly marginal operator is shown to generate a line of stable fixed points parameterized by
Externí odkaz:
http://arxiv.org/abs/cond-mat/0301158
Publikováno v:
Phys. Rev. Lett. 87, 016602 (2001)
We study the persistent currents induced by both the Aharonov-Bohm and Aharonov-Casher effects in a one-dimensional mesoscopic ring coupled to a side-branch quantum dot at Kondo resonance. For privileged values of the Aharonov-Bohm-Casher fluxes, the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0010101
Publikováno v:
Europhys. Lett. 50, 125 (2000) (addendum)
This is an addendum to our previous work cond-mat/9705048 (published in Europhysics Letters 41, 213 (1998)), clarifying the construction of the two-particle scattering matrices used for studying the magnetic impurity behavior in a multichannel correl
Externí odkaz:
http://arxiv.org/abs/cond-mat/0004249