- Tuning superconductivity with spin-orbit coupling and proximity effects.
- Phys. Rev. B 105, 184504 (2022) - Superconductivity and.
- Superconductivity in crystals with spin-orbit coupling | Modern.
- Superconductivity and spin-orbit coupling in non-centrosymmetric.
- (PDF) Tuning Spin-Orbit Coupling and Superconductivity at the.
- Superconductivity in three-dimensional spin-orbit coupled semimetals.
- Two-dimensional superconductivity and anisotropic transport.
- Surface atomic-layer superconductors with Rashba/Zeeman-type spin-orbit.
- Tuning Spin-Orbit Coupling and Superconductivity at the.
- Superconductivity and spin–orbit coupling in non.
- Spin-orbit-coupled superconductivity | Scientific Reports.
- Interplay of spin-orbit coupling and... - Wiley Online Library.
- Rashba effect - Wikipedia.
Tuning superconductivity with spin-orbit coupling and proximity effects.
Aug 20, 2015 · Origin of spin–orbit coupling. When an electron with momentum p moves in a magnetic field B, it experiences a Lorentz force in the direction perpendicular to its motion F = −e p × B/m and. Rashba type spin-orbit coupling breaks inversion and spin symmetry, which can lead to a mixing of superconducting spin-singlet and spin-triplet states. Here, the authors present a numerical investigation of superconducting phases of the Rashba-Hubbard model. They study the two-dimensional square lattice as a paradigm and discuss how the arising superconducting phases, including helical spin.
Phys. Rev. B 105, 184504 (2022) - Superconductivity and.
The discovery of an ever-increasing family of atomic layered magnetic materials, together with the already established vast catalogue of strong spin–orbit coupling and topological systems, calls.
Superconductivity in crystals with spin-orbit coupling | Modern.
Spin-orbit-coupled ferroelectric superconductivity. Model of superconductivity the energy gap that is known to appear in superconducting states is caused by spin-orbit coupling and the magnetic field associated with the superconducting state. The magnetic field dependence of the energy gap in this model should be linear. In the. Rashba SOI, which originates from the coupling of valence and conduction bands. The predicted strong SOI is interesting for controlling the spin in a quantum dot electrically.5,6 Combining this strong SOI with superconductivity is a promising route toward a topological superconductor.7,8 Signatures of Majorana bound states (MBSs) have been. Identifying new bulk superconductors with topologically nontrivial bands in the normal state is critical for achieving topological superconductivity with Majorana fermions for applications in quantum computing. Here, the authors perform measurements on the nodal-line semimetal CaSb${}_{2}$ using single crystals for the first time, which reveal superconductivity and electron-hole compensation.
Superconductivity and spin-orbit coupling in non-centrosymmetric.
We argue that the survival of superconductivity at Zeeman energies much larger than the superconducting gap can be understood only as the consequence of strong spin–orbit coupling that, together with substrate-induced inversion-symmetry breaking, produces spin splitting in the normal-state energy bands that is much larger than the superconductor’s energy.
(PDF) Tuning Spin-Orbit Coupling and Superconductivity at the.
Spin-orbit-coupled superconductivity Abstract. Superconductivity and spin-orbit (SO) interaction have been two separate emerging fields until very recently... Introduction. Spin-orbit (SO) interaction, which couples the electron orbital motion to its spin, has been at the center... Results. Figure 1. The superconducting transition temperature T c of the SrTiO3/LaAlO3 interface was varied by the electric field effect. The anisotropy of the upper critical field and the normal-state magnetotransport were studied as a function of gate voltage. The spin-orbit coupling energy ϵSO is extracted. This tunable energy scale is used to explain the strong.
Superconductivity in three-dimensional spin-orbit coupled semimetals.
Systems simultaneously exhibiting superconductivity and spin-orbit coupling are predicted to provide a route toward topological superconductivity and unconventional electron pairing, driving significant contemporary interest in these materials. The Rashba spin-orbit coupling is typical for systems with uniaxial symmetry, e.g., for hexagonal crystals of CdS and CdSe for which it was originally found and perovskites, and also for heterostructures where it develops as a result of a symmetry breaking field in the direction perpendicular to the 2D surface. Recent experiments reported gate-induced superconductivity in the monolayer 1 T ′ − WTe 2 which is a two-dimensional topological insulator in its normal state. The in-plane upper critical field B c 2 is found to exceed the conventional Pauli paramagnetic limit B p by one to three times. The enhancement cannot be explained by conventional spin-orbit coupling which vanishes due to inversion.
Two-dimensional superconductivity and anisotropic transport.
The spin-orbit coupling energy is extracted. This tunable energy scale is used to explain the strong gate dependence of the mobility and of the anomalous Hall signal observed. Recently, materials with strong spin-orbit coupling (SOC) effect have attracted a great deal of attention due to the resulted novel topological phases. Among those materials, the heaviest group V semimetal Bi-based compounds are mostly investigated1. Bi2X3(X = Se, Te)2,3and ultrathin Bi(111) Films4,5,6are suggested to be topological insulators. In particular, this implies that Anderson's theorem, which addresses the effect of spin-orbit coupling and disorder on pairing states of spin-1/2 electrons, cannot be applied in this case. (ii) The leading pairing instabilities are different for electron and hole doping. This implies that superconductivity depends on carrier type.
Surface atomic-layer superconductors with Rashba/Zeeman-type spin-orbit.
Dec 01, 2016 · the electron–phonon coupling strength λ q ν, see Eq.. Recent developments and new functionalities since EPW v. 2.3 include: • the code is integrated in the latest Quantum ESPRESSO distribution (v. 5.3); • the spin–orbit coupling is now implemented; • the treatment of time-reversal symmetry of non- centrosymmetric crystal is now. To confirm the coupling through Nb, we increased the thickness of Nb to 45 nm for samples a3 and a4, and the results are shown by blue (sample a3) and green (sample a4) triangles in figure 2 (c). During swapping θ, these two curves almost overlap, and the largest difference TC / TC 0 values between samples a4 and a5 are 0.848 and 0.86.
Tuning Spin-Orbit Coupling and Superconductivity at the.
Ultrathin two-dimensional superconductivity with strong spin-orbit coupling Hyoungdo Nama, Hua Chena, Tijiang Liub, Jisun Kima,1, Chendong Zhanga, Jie Yongc,2, Thomas R. Lembergerc, Philip A. Kratz d, John R. Kirtley , Kathryn Moler , Philip W. Adamsb, Allan H. MacDonalda,3, and Chih-Kang Shiha,3 aDepartment of Physics, The University of Texas at Austin, Austin, TX 78712; bDepartment of.
Superconductivity and spin–orbit coupling in non.
Mar 08, 2018 · Calculations show that the topological order originates from the Te substitution, which not only introduces large spin-orbit coupling (SOC) but also shifts the p z band downward to E F , whereas the p z band in FeSe or iron pnictides is generally above E F (18, 19). Figure 1D shows the calculated band structure along ΓM and ΓZ. May 07, 2022 · Moreover, the combined effect of the spin-orbit coupling and the external magnetic field results in the non-zero total momentum of the Cooper pairs, which is a characteristic feature of the so-called Fulde-Ferrell-Larkin-Ovchinnikov state (FFLO). Spin-orbit-coupled ferroelectric superconductivity Abstract Motivated by recent studies on ferroelectriclike order coexisting with metallicity, we investigate ferroelectric (FE) superconductivity in which a FE-like structural phase transition occurs in the superconducting state.
Spin-orbit-coupled superconductivity | Scientific Reports.
Overview of topological superconductivity will be given. 1.1. Conceptual description of key results in non-centrosymmetric superconductivity The key microscopic ingredient in understanding the physics of superconductors without inversion symmetry is the anti-symmetric spin–orbit coupling (ASOC) of the single electron states in a material. Spin-orbit coupling constant λ =100 meV, intraorbital Hubbard U =0.9 eV, Hund's J =0.1 eV, interorbital U ′= U −2 J, and pair-hopping term J ′= J Full size image One of the recent puzzles in FeBS is the discovered anisotropy of the spin resonance peak in Ni-doped Ba-122 [ 12 ]. It was found that χ +− and 2 χ zz are different. There is much current interest in combining superconductivity and spin-orbit coupling in order to induce the topological superconductor phase and associated Majorana-like quasiparticles which hold great promise towards fault-tolerant quantum computing.
Interplay of spin-orbit coupling and... - Wiley Online Library.
Spin-orbit coupling and superconductivity spin-orbit coupling as a perturbation spin singlet pairing: minor effect spin triplet pairing: allmost all pairing states severely suppressed weakly affected pairing states: CePt 3Si: k x k y. The Superconducting Phase and the Magnetic Field. Systems simultaneously exhibiting superconductivity and spin–orbit coupling are predicted to provide a route toward topological superconductivity and unconventional electron pairing, driving.
Rashba effect - Wikipedia.
In non-centrosymmetric superconductors, where the crystal structure lacks a centre of inversion, parity is no longer a good quantum number and an electronic antisymmetric spin-orbit coupling (ASOC) is allowed to exist by symmetry. If this ASOC is sufficiently large, it has profound consequences on the superconducting state. Field-effect control of superconductivity and Rashba spin-orbit coupling in top-gated LaAlO3/SrTiO3 devices By J. Biscaras , C. Feuillet-palma , Marco Grilli , and N. Reyren Download PDF. Spin is an intrinsic form of angular momentum carried by elementary... and superconductivity,... Spin–orbit coupling leads to the fine structure of atomic.
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