The Experts below are selected from a list of 90774 Experts worldwide ranked by ideXlab platform
Asle Sudbo - One of the best experts on this subject based on the ideXlab platform.
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tunneling conductance and local density of states in time reversal symmetry breaking Superconductors under the influence of an external magnetic field
Physical Review B, 2009Co-Authors: Mihail Silaev, Takehito Yokoyama, Jacob Linder, Yukio Tanaka, Asle SudboAbstract:We consider different effects that arise when time-reversal symmetry breaking Superconductors are subjected to an external magnetic field, thus rendering the Superconductor to be in the mixed state ...
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theory of andreev reflection in junctions with iron based high t c Superconductors
Physical Review B, 2009Co-Authors: Jacob Linder, Asle SudboAbstract:We construct a theory for low-energy quantum transport in $\text{normal}\ensuremath{\mid}\text{Superconductor}$ junctions involving the recently discovered iron-based high-${T}_{c}$ Superconductors. We properly take into account both Andreev bound surface states and the complex Fermi-surface topology in our approach and investigate the signatures of the possible order-parameter symmetries for the FeAs lattice. Our results could be helpful in determining the symmetry of the superconducting state in the iron-pnicitide Superconductors.
Erez Berg - One of the best experts on this subject based on the ideXlab platform.
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odd parity topological Superconductors theory and application to cu _x bi _2 se _3
Physical Review Letters, 2010Co-Authors: Liang Fu, Erez BergAbstract:Topological Superconductors have a full pairing gap in the bulk and gapless surface Andreev bound states. In this Letter, we provide a sufficient criterion for realizing time-reversal-invariant topological Superconductors in centrosymmetric Superconductors with odd-parity pairing. We next study the pairing symmetry of the newly discovered Superconductor ${\mathrm{Cu}}_{x}{\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ within a two-orbital model, and find that a novel spin-triplet pairing with odd parity is favored by strong spin-orbit coupling. Based on our criterion, we propose that ${\mathrm{Cu}}_{x}{\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ is a good candidate for a topological Superconductor. We close by discussing experimental signatures of this new topological phase.
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odd parity topological Superconductors theory and application to cuxbi2se3
Physical Review Letters, 2010Co-Authors: Erez BergAbstract:Topological Superconductors have a full pairing gap in the bulk and gapless surface Andreev bound states. In this Letter, we provide a sufficient criterion for realizing time-reversal-invariant topological Superconductors in centrosymmetric Superconductors with odd-parity pairing. We next study the pairing symmetry of the newly discovered Superconductor ${\mathrm{Cu}}_{x}{\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ within a two-orbital model, and find that a novel spin-triplet pairing with odd parity is favored by strong spin-orbit coupling. Based on our criterion, we propose that ${\mathrm{Cu}}_{x}{\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ is a good candidate for a topological Superconductor. We close by discussing experimental signatures of this new topological phase.
Liang Fu - One of the best experts on this subject based on the ideXlab platform.
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odd parity topological Superconductors theory and application to cu _x bi _2 se _3
Physical Review Letters, 2010Co-Authors: Liang Fu, Erez BergAbstract:Topological Superconductors have a full pairing gap in the bulk and gapless surface Andreev bound states. In this Letter, we provide a sufficient criterion for realizing time-reversal-invariant topological Superconductors in centrosymmetric Superconductors with odd-parity pairing. We next study the pairing symmetry of the newly discovered Superconductor ${\mathrm{Cu}}_{x}{\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ within a two-orbital model, and find that a novel spin-triplet pairing with odd parity is favored by strong spin-orbit coupling. Based on our criterion, we propose that ${\mathrm{Cu}}_{x}{\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ is a good candidate for a topological Superconductor. We close by discussing experimental signatures of this new topological phase.
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superconducting proximity effect and majorana fermions at the surface of a topological insulator
Physical Review Letters, 2008Co-Authors: Liang Fu, C L KaneAbstract:We study the proximity effect between an $s$-wave Superconductor and the surface states of a strong topological insulator. The resulting two-dimensional state resembles a spinless ${p}_{x}+i{p}_{y}$ Superconductor, but does not break time reversal symmetry. This state supports Majorana bound states at vortices. We show that linear junctions between Superconductors mediated by the topological insulator form a nonchiral one-dimensional wire for Majorana fermions, and that circuits formed from these junctions provide a method for creating, manipulating, and fusing Majorana bound states.
Jacob Linder - One of the best experts on this subject based on the ideXlab platform.
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tunneling conductance and local density of states in time reversal symmetry breaking Superconductors under the influence of an external magnetic field
Physical Review B, 2009Co-Authors: Mihail Silaev, Takehito Yokoyama, Jacob Linder, Yukio Tanaka, Asle SudboAbstract:We consider different effects that arise when time-reversal symmetry breaking Superconductors are subjected to an external magnetic field, thus rendering the Superconductor to be in the mixed state ...
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theory of andreev reflection in junctions with iron based high t c Superconductors
Physical Review B, 2009Co-Authors: Jacob Linder, Asle SudboAbstract:We construct a theory for low-energy quantum transport in $\text{normal}\ensuremath{\mid}\text{Superconductor}$ junctions involving the recently discovered iron-based high-${T}_{c}$ Superconductors. We properly take into account both Andreev bound surface states and the complex Fermi-surface topology in our approach and investigate the signatures of the possible order-parameter symmetries for the FeAs lattice. Our results could be helpful in determining the symmetry of the superconducting state in the iron-pnicitide Superconductors.
Joseph A Stroscio - One of the best experts on this subject based on the ideXlab platform.
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experimental evidence for s wave pairing symmetry in superconducting cu x bi 2 se 3 single crystals using a scanning tunneling microscope
Physical Review Letters, 2013Co-Authors: Niv Levy, Tong Zhang, Jeonghoon Ha, Fred Sharifi, Alec A Talin, Joseph A StroscioAbstract:: Topological Superconductors represent a newly predicted phase of matter that is topologically distinct from conventional superconducting condensates of Cooper pairs. As a manifestation of their topological character, topological Superconductors support solid-state realizations of Majorana fermions at their boundaries. The recently discovered Superconductor Cu(x)Bi(2)Se(3) has been theoretically proposed as an odd-parity Superconductor in the time-reversal-invariant topological Superconductor class, and point-contact spectroscopy measurements have reported the observation of zero-bias conductance peaks corresponding to Majorana states in this material. Here we report scanning tunneling microscopy measurements of the superconducting energy gap in Cu(x)Bi(2)Se(3) as a function of spatial position and applied magnetic field. The tunneling spectrum shows that the density of states at the Fermi level is fully gapped without any in-gap states. The spectrum is well described by the Bardeen-Cooper-Schrieffer theory with a momentum independent order parameter, which suggests that Cu(x)Bi(2)Se(3) is a classical s-wave Superconductor contrary to previous expectations and measurements.
