2,770 research outputs found
Multi-anyons in the magnetic field
We consider the external magnetic field effects on the two types of anyon
with fractional statistical parameters with coprimes and , one
with fractional charge and flux (type I), the other
with fractional flux and fundamental charge (type II). These
two-types of anyons show different behaviors in the presence of the external
magnetic field. We also considered the geometry in which a two-dimensional
plane contains an island of anyons with different statistical parameter in
their equilibrium. The equilibrium inside an island is shown to be periodic
with respect to the flux through the island. The period for the type I anyon
equals to the integer multiple of the fundamental flux quantum. In the case of
type II anyon the period is found to be the fractional multiple of the
fundamental flux quantum.Comment: revtex, no figure
Ferromagnetic Fixed Point of the Kondo Model in a Luttinger Liquid
The Kondo effect in a Luttinger liquid is studied using the renormalization
group method. By renormalizing the boson fields, scaling equations to the
second order for an arbitrary Luttinger interaction are obtained. For the
ferromagnetic Kondo coupling, a spin bound state(triplet) can be realized
without invoking a nearest neighbor spin interaction in agreement with the
recent Bethe ansatz calculation. The scaling theory in the presence of the
scalar potential shows that there is no interplay between the magnetic and
non-magnetic interaction. Also a study on the crossover behavior of the Kondo
temperature between the exponential and the power law type is presented.Comment: 9 pages, 2 figures. Accepted for publication in J. Phys.: Condens.
Matte
Oxygen Partial Pressure during Pulsed Laser Deposition: Deterministic Role on Thermodynamic Stability of Atomic Termination Sequence at SrRuO3/BaTiO3 Interface
With recent trends on miniaturizing oxide-based devices, the need for
atomic-scale control of surface/interface structures by pulsed laser deposition
(PLD) has increased. In particular, realizing uniform atomic termination at the
surface/interface is highly desirable. However, a lack of understanding on the
surface formation mechanism in PLD has limited a deliberate control of
surface/interface atomic stacking sequences. Here, taking the prototypical
SrRuO3/BaTiO3/SrRuO3 (SRO/BTO/SRO) heterostructure as a model system, we
investigated the formation of different interfacial termination sequences
(BaO-RuO2 or TiO2-SrO) with oxygen partial pressure (PO2) during PLD. We found
that a uniform SrO-TiO2 termination sequence at the SRO/BTO interface can be
achieved by lowering the PO2 to 5 mTorr, regardless of the total background gas
pressure (Ptotal), growth mode, or growth rate. Our results indicate that the
thermodynamic stability of the BTO surface at the low-energy kinetics stage of
PLD can play an important role in surface/interface termination formation. This
work paves the way for realizing termination engineering in functional oxide
heterostructures.Comment: 27 pages, 6 figures, Supporting Informatio
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Controlling the Magnetic Anisotropy of the van der Waals Ferromagnet Fe3GeTe2 through Hole Doping.
Identifying material parameters affecting properties of ferromagnets is key to optimized materials that are better suited for spintronics. Magnetic anisotropy is of particular importance in van der Waals magnets, since it not only influences magnetic and spin transport properties, but also is essential to stabilizing magnetic order in the two-dimensional limit. Here, we report that hole doping effectively modulates the magnetic anisotropy of a van der Waals ferromagnet and explore the physical origin of this effect. Fe3-xGeTe2 nanoflakes show a significant suppression of the magnetic anisotropy with hole doping. Electronic structure measurements and calculations reveal that the chemical potential shift associated with hole doping is responsible for the reduced magnetic anisotropy by decreasing the energy gain from the spin-orbit induced band splitting. Our findings provide an understanding of the intricate connection between electronic structures and magnetic properties in two-dimensional magnets and propose a method to engineer magnetic properties through doping
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