Boundary topological superconductors

Li, Bo-Xuan; Yan, Zhongbo

doi:10.1103/physrevb.103.064512

Cited by 16 publications

(6 citation statements)

References 82 publications

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“…Analogous edge modes representing a weak topological phase and protected by particle-hole and translation symmetry were observed for similar driving schemes [77]. Static counterparts of such floating band modes were shown to lead to second-order topological superconducting states in the presence of s ± -wave superconductivity [105].…”

Section: Appendix B: Chiral Edge Modesmentioning

confidence: 71%

Crossdimensional universality classes in static and periodically driven Kitaev models

et al. 2021

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The Kitaev model on the honeycomb lattice is a paradigmatic system known to host a wealth of nontrivial topological phases and Majorana edge modes. In the static case, the Majorana edge modes are nondispersive. When the system is periodically driven in time, such edge modes can disperse and become chiral. We obtain the full phase diagram of the driven model as a function of the coupling and the driving period. We characterize the quantum criticality of the different topological phase transitions in both the static and driven model via the notions of Majorana-Wannier state correlation functions and momentum-dependent fidelity susceptibilities. We show that the system hosts crossdimensional universality classes: although the static Kitaev model is defined on a two-dimensional (2D) honeycomb lattice, its criticality falls into the universality class of one-dimensional (1D) linear Dirac models. For the periodically driven Kitaev model, in addition to the universality class of prototype 2D linear Dirac models, an additional 1D nodal loop type of criticality exists owing to emergent time-reversal and mirror symmetries, indicating the possibility of engineering multiple universality classes by periodic driving. The manipulation of time-reversal symmetry allows the periodic driving to control the chirality of the Majorana edge states.

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Section: Appendix B: Chiral Edge Modesmentioning

confidence: 71%

Crossdimensional universality classes in static and periodically driven Kitaev models

et al. 2021

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“…Pumping with a 400 nm (3.1 eV) light pulse induces above bandgap excitation in both YIG (2.6-2.8 eV bandgap) 51,52 and hematite (2.0-2.2 eV bandgap). 53,54 The upper valence band of these materials comprises primarily O 2p orbitals and the conduction band comprises primarily Fe 3p orbitals 54,55 so that an above bandgap excitation constitutes an electron transfer from O to Fe atoms. 56 This charge transfer reduces Fe 3+ atoms to Fe 2+ and causes decrease in the M 2,3 -edge absorption of Fe 3+ which manifests as a bleach feature at 55 eV.…”

Section: Resultsmentioning

confidence: 99%

Spin polarized electron dynamics enhance water splitting efficiency by yttrium iron garnet photoanodes: a new platform for spin selective photocatalysis

Gajapathy,

Bandaranayake,

Hruska

et al. 2024

Chem. Sci.

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“…For the Fe1Cu1 SLs, the first peak at 1.5 eV mainly contributed from Fe d→p orbitals at minority states correspond to the in-plane Fe-Fe dd hybridization [9]. It indicates that the interband transition is influenced by the hybridization process [17]. Therefore, we can estimate that the broad peaks of 1xx in the Fe2Cu2 SLs correspond to double peaks DOS of Fe minority state at around 0.8 and 2.0 eV above EF.…”

Section: Electronic Optical and Magneto-optical Propertiesmentioning

confidence: 90%

Enhanced Sensitivity of Magneto-Optical Surface Plasmon Resonance in the FeCu Superlattices

Arifin,

Suharyadi,

Ahmadi

et al. 2024

J. Phys.: Conf. Ser.

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We demonstrated the sensitivity enhancement for magneto-optical surface plasmon resonance (MOSPR) using noble/ferromagnetic metals multilayers. The proposed structure is based on the Kretschmann configuration in the transverse magneto-optical Kerr effect (TMOKE) methods with the FeCu superlattices (SLs) as magneto-plasmonic materials and gelatin as biomolecules analyte. The dielectric constants of the FeCu SLs are taken from first principles calculation, which is performed by using a full-potential linearized augmented plane wave (FLAPW) method. The important role of the hybridization process in optical transitions has been identified, and it can be modulated by adjusting the thickness of superlattices. The dependence of the reflectivity on the dielectric constant is performed by 4×4 transfer matrix methods. It is found that the minimum reflectivity directly influences the slope of angular spectra, with a maximum slope of TMOKE signal is 12.23/degree. The change in the gelatin’s refractive index results in TMOKE signal response, then the enhancement of the sensitivity of the MOSPR system can be shown.

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Boundary topological superconductors

Cited by 16 publications

References 82 publications

Crossdimensional universality classes in static and periodically driven Kitaev models

Crossdimensional universality classes in static and periodically driven Kitaev models

Spin polarized electron dynamics enhance water splitting efficiency by yttrium iron garnet photoanodes: a new platform for spin selective photocatalysis

Enhanced Sensitivity of Magneto-Optical Surface Plasmon Resonance in the FeCu Superlattices

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