Transport and spectroscopic properties of superconductor/ferromagnet/superconductor junctions of La<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mrow><mml:mn>1.9</mml:mn></mml:mrow></mml:msub></mml:math>Sr<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mrow><mml:mn>0.1</mml:mn></mml:mrow></mml:msub></mml:math>CuO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:

Koren, G.; Kirzhner, T.

doi:10.1103/physrevb.84.134517

Cited by 11 publications

(17 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although at low temperatures the manganite LSMO is in a ferromagnetic state, the superconducting current can still flow across thin layers of ferromagnet according to Refs. 4,5,[8][9][10][11]. To test this prediction, we investigated the influence of strong magnetic fields on the shape of the R(T)-transition in the samples of MgB 2 and the composite.…”

Section: Resultsmentioning

confidence: 99%

“…For instance, the proximity effect in hybrid film structures LSMO-YBCO has been demonstrated by scanning tunneling spectroscopy. [8][9][10][11] The appearance of the proximity effect and the coherent state of ferromagnetic LSMO manganite in the junctions of the LSMO-superconductor (Pb, Nb, MgB 2 ) type has been observed in experiments on Andreev reflection. [12][13][14] Besides the spectroscopic manifestations of the proximity effect in superconductor-manganite junctions, there are numerous studies of the superconducting current transport in hybrid film structures of the superconductor-manganite-superconductor type.…”

Section: Introductionmentioning

confidence: 90%

“…[8][9][10][11] The appearance of the proximity effect and the coherent state of ferromagnetic LSMO manganite in the junctions of the LSMO-superconductor (Pb, Nb, MgB 2 ) type has been observed in experiments on Andreev reflection. [12][13][14] Besides the spectroscopic manifestations of the proximity effect in superconductor-manganite junctions, there are numerous studies of the superconducting current transport in hybrid film structures of the superconductor-manganite-superconductor type. [8][9][10][11]14 It should be noted that the proximity effect in manganites has been observed for various symmetries of the order parameter of the superconductor in contact.…”

Section: Introductionmentioning

confidence: 90%

“…[12][13][14] Besides the spectroscopic manifestations of the proximity effect in superconductor-manganite junctions, there are numerous studies of the superconducting current transport in hybrid film structures of the superconductor-manganite-superconductor type. [8][9][10][11]14 It should be noted that the proximity effect in manganites has been observed for various symmetries of the order parameter of the superconductor in contact. In particular, superconductors Pb, Nb, MgB 2 , which were used in the experiments of Refs.…”

Section: Introductionmentioning

confidence: 99%

“…12 and 13, have s-wave symmetry of the order parameter, while the cuprate YBCO exhibits d-wave symmetry of the order parameter. [8][9][10][11]14 Thus, the question of the transport mechanism of Cooper pairs through a half-metal remains open and is a subject of intense research.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Transport characteristics of a superconductor–ferromagnet composite

Кононенко

Tarenkov

Dyachenko

et al. 2014

Low Temperature Physics

View full text Add to dashboard Cite

The transport properties of a composite consisting of the microparticles of superconductor MgB2 and nanopowder of manganite La0.7Sr0.3MnO3 (LSMO) were studied. It was found that when the amount of the ferromagnet component in the composite was above 10% by volume, a sharp increase in the resistivity of the composite occurred. This is caused by the disruption of percolation paths through the magnesium diboride microparticles, thus leading to the formation of a network of superconductor-ferromagnet-superconductor junctions. As a result, a significant broadening of the superconducting transition of the composite was observed while its ferromagnetic properties were maintained. The obtained data indicate that Cooper pairs can pass through the layer of a half-metal ferromagnet with high (about 100%) spin polarization of the charge carriers and thickness d > 10 nm.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Transport characteristics of a superconductor–ferromagnet composite

Кононенко

Tarenkov

Dyachenko

et al. 2014

Low Temperature Physics

View full text Add to dashboard Cite

show abstract

Topological Insulators, Topological Dirac semimetals, Topological Crystalline Insulators, and Topological Kondo Insulators

Hasan

Neupane

2015

Topological Insulators

View full text Add to dashboard Cite

IntroductionTopological phases of matter differ from conventional materials in that the former feature a nontrivial topological invariant in their bulk electronic wavefunction space [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. The experimental discoveries of the two-dimensional (2D) integer and fractional quantum Hall (IQH and FQH) states [15][16][17][18][19] in the 1980s realized the first two topological phases of matter in nature. These 2D topological systems are insulators in the bulk because the Fermi level is located in the middle of two Landau levels. On the other hand, the edges of these 2D topological insulators (TIs) (IQH and FQH) feature chiral 1D metallic states, leading to remarkable quantized charge transport phenomena. The quantized transverse magneto-conductivity = ne 2 ∕h (where e is the electric charge and h is the Planck constant) can be probed by charge transport experiements, which also provides a measure of the topological invariant (the Chern number) n that characterizes these quantum Hall states [20,21]. In 2005, theoretical advances [22, 23] predicted a third type of 2D TI, the quantum spin Hall (QSH) insulator. Such a topological state is symmetry-protected. A QSH insulator can be viewed as two copies of quantum Hall systems that have magnetic fields in the opposite direction. Therefore, no external magnetic field is required for the QSH phase, and the pair of quantum-Hall-like edge modes are related by the time-reversal (TR) symmetry (Figure 4.1). In 2007, the QSH phase was experimentally demonstrated in the (Hg, Cd)Te quantum wells using charge transport by measuring a longitudinal conductance of about 2e 2 ∕h (two copies of quantum Hall currents) at millikelvin temperatures [24]. The topological number that describes the QSH phase is a Z 2 invariant (ν). The Z 2 invariant can only take two values, 0 or 1, where ν = 0(1) is topologically trivial (nontrivial).However, it is important to note that the 2D topological (IQH, FQH, and QSH) insulators are realized only at buried interfaces of ultraclean semiconductor

show abstract

Novel Majorana mode and magnetoresistance in ferromagnetic superconducting topological insulator

Goudarzi¹,

Khezerlou²,

Asgarifar³

2017

Physica E: Low-dimensional Systems and Nanostructures

View full text Add to dashboard Cite

Among the potential applications of topological insulators, we investigate theoretically the effect of coexistence of proximity-induced ferromagnetism and superconductivity on the surface states of 3-dimensional topological insulator, where the superconducting electron-hole excitations can be significantly affected by the magnetization of ferromagnetic order. We find that, Majorana mode energy, as a verified feature of TI F/S structure, along the interface sensitively depends on the magnitude of magnetization m zf s in FS region, while its slope in perpendicular incidence presents steep and no change. Since the superconducting gap is renormalized by a factor η(m zf s ), hence Andreev reflection is more or less suppressed, and, in particular, resulting subgap tunneling conductance is more sensitive to the magnitude of magnetizations in FS and F regions. Furthermore, an interesting scenario happens at the antiparallel configuration of magnetizations m zf and m zf s resulting in magnetoresistance in N/F/FS junction, which can be controlled and decreased by tuning the magnetization magnitude in FS region. : 74.45.+c; 85.75.-d; 73.20.-r PACS

show abstract

Transport and spectroscopic properties of superconductor/ferromagnet/superconductor junctions of La1.9Sr0.1CuO

Cited by 11 publications

References 29 publications

Transport characteristics of a superconductor–ferromagnet composite

Transport characteristics of a superconductor–ferromagnet composite

Topological Insulators, Topological Dirac semimetals, Topological Crystalline Insulators, and Topological Kondo Insulators

Novel Majorana mode and magnetoresistance in ferromagnetic superconducting topological insulator

Contact Info

Product

Resources

About