Thin films of anisotropic superconductors

Tešanović, Zlatko

doi:10.1103/physrevb.32.7575

Cited by 8 publications

(7 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is also interesting to examine the e ects of di usive boundaries on surface superconductivity. It is known that rough surfaces are pair breaking for anisotropic superconductors 13,14] and therefore are expected to suppress surface superconductivity. Here we investigate how strong such a suppression will be for general order parameter symmetries.…”

mentioning

confidence: 99%

Effect of diffusive boundaries on surface superconductivity in unconventional superconductors

Agterberg

Walker

1996

Phys. Rev. B

View full text Add to dashboard Cite

Boundary conditions for a superconducting order parameter at a di usive scattering boundary are derived from microscopic theory. The results indicate that for all but isotropic gap functions the di usive boundary almost completely suppresses surface superconductivity in the Ginzburg-Landau regime. This indicates that in anisotropic superconductors surface superconductivity can only be observed for surface normals along high symmetry directions where atomically clean surfaces can be cleaved. 74.60.Ec, 74.70.Tx Typeset using REVT E X

show abstract

mentioning

confidence: 99%

Effect of diffusive boundaries on surface superconductivity in unconventional superconductors

Agterberg

Walker

1996

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…The idea can also be applied for Dirac fermion waves by defining a velocity barrier as the region in which the Fermi velocity differs from that in the surrounding background. In analogy with optics, some optical rules are expected to be valid for massless Dirac fermion waves propagating in monolayer graphene sheets [9].…”

Section: Introductionmentioning

confidence: 99%

“…The electronic properties of monolayer graphene sheets with spatial modulation of the Fermi velocity have been investigated in the literature [9,18,[20][21][22]. However, the electronic properties in bilayer graphene (BLG) with an interlayer asymmetric velocity have not been elucidated in detail so far.…”

Section: Introductionmentioning

confidence: 99%

Control over band structure and tunneling in bilayer graphene induced by velocity engineering

Cheraghchi

Adinehvand

2013

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

The band structure and transport properties of massive Dirac fermions in bilayer graphene with velocity modulation in space are investigated in the presence of a previously created band gap. It is pointed out that velocity engineering may be considered as a factor to control the band gap of symmetry-broken bilayer graphene. The band gap is direct and independent of velocity value if the velocity modulated in two layers is set up equally. Otherwise, in the case of interlayer asymmetric velocity, not only is the band gap indirect, but also the electron-hole symmetry fails. This band gap is controllable by the ratio of the velocity modulated in the upper layer to the velocity modulated in the lower layer. In more detail, the shift of momentum from the conduction band edge to the valence band edge can be engineered by the gate bias and velocity ratio. A transfer matrix method is also elaborated to calculate the four-band coherent conductance through a velocity barrier possibly subjected to a gate bias. Electronic transport depends on the ratio of velocity modulated inside the barrier to that for surrounding regions. As a result, a quantum version of total internal reflection is observed for thick enough velocity barriers. Moreover, a transport gap originating from the applied gate bias is engineered by modulating the velocities of the carriers in the upper and lower layers.

show abstract

“…In the past few years, the wavevector filtering effect of graphene-based structures through magnetic barriers, [16] a velocity barrier, [17,18] and an electrostatic potential barrier [19,20] have been investigated. It is necessary to mention that vector filtering can occur in graphene between quantum wire contacts.…”

mentioning

confidence: 99%

Wavevector Filtering through Monolayer and Bilayer Graphene Superlattices

Sattari¹,

Faizabadi²

2013

Chinese Phys. Lett.

View full text Add to dashboard Cite

We investigate the transport properties through monolayer and bilayer graphene superlattices modulated by an in-plane homogeneous electric field based on the transfer matrix method. It is found that the angular range of the transmission probability through a graphene superlattice can be effectively controlled by the number of barriers and this results in the structure having efficient wavevector filters. As the number of barriers increases, this range shrinks. It is also shown that the conductance of the systems has an oscillatory behavior with respect to the barrier height and it decreases with the increasing number of barriers.

show abstract

Thin films of anisotropic superconductors

Cited by 8 publications

References 20 publications

Effect of diffusive boundaries on surface superconductivity in unconventional superconductors

Effect of diffusive boundaries on surface superconductivity in unconventional superconductors

Control over band structure and tunneling in bilayer graphene induced by velocity engineering

Wavevector Filtering through Monolayer and Bilayer Graphene Superlattices

Contact Info

Product

Resources

About