Zeeman effect ≈ Zeeman effect
View article: Andreev bound states versus Majorana bound states in quantum dot-nanowire-superconductor hybrid structures: Trivial versus topological zero-bias conductance peaks
Andreev bound states versus Majorana bound states in quantum dot-nanowire-superconductor hybrid structures: Trivial versus topological zero-bias conductance peaks Open
Motivated by an important recent experiment [Deng et al., Science 354, 1557\n(2016)], we theoretically consider the interplay between Andreev bound\nstates(ABSs) and Majorana bound states(MBSs) in quantum dot-nanowire\nsemiconductor system…
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Topological Exciton Bands in Moiré Heterojunctions Open
Moiré patterns are common in van der Waals heterostructures and can be used to apply periodic potentials to elementary excitations. We show that the optical absorption spectrum of transition metal dichalcogenide bilayers is profoundly alte…
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Josephson diode effect from Cooper pair momentum in a topological semimetal Open
Cooper pairs in non-centrosymmetric superconductors can acquire finite centre-of-mass momentum in the presence of an external magnetic field. Recent theory predicts that such finite-momentum pairing can lead to an asymmetric critical curre…
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Optical properties of atomically thin transition metal dichalcogenides: observations and puzzles Open
Recent results on the optical properties of monolayer and few layers of semiconducting transition metal dichalcogenides are reviewed. Experimental observations are presented and discussed in the frame of existing models, highlighting the l…
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Two-terminal charge tunneling: Disentangling Majorana zero modes from partially separated Andreev bound states in semiconductor-superconductor heterostructures Open
We demonstrate that partially overlapping Majorana bound states (MBSs) represent a generic low-energy feature that emerges in non-homogeneous semiconductor nanowires coupled to superconductors in the presence of a Zeeman field. The emergen…
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Charge-to-Spin Conversion by the Rashba–Edelstein Effect in Two-Dimensional van der Waals Heterostructures up to Room Temperature Open
The proximity of a transition-metal dichalcogenide (TMD) to graphene imprints a rich spin texture in graphene and complements its high-quality charge/spin transport by inducing spin-orbit coupling (SOC). Rashba and valley-Zeeman SOCs are t…
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Ising Superconductivity and Quantum Phase Transition in Macro-Size Monolayer NbSe<sub>2</sub> Open
Two-dimensional (2D) transition metal dichalcogenides (TMDs) have a range of unique physics properties and could be used in the development of electronics, photonics, spintronics, and quantum computing devices. The mechanical exfoliation t…
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Large valley splitting in monolayer by proximity coupling to an insulating antiferromagnetic substrate Open
Lifting the valley degeneracy is an efficient way to achieve valley\npolarization for further valleytronics operations. In this work, we demonstrate\nthat a large valley splitting can be obtained in monolayer transition metal\ndichalcogeni…
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Photon-Mediated Spin-Exchange Dynamics of Spin-1 Atoms Open
We report direct observations of photon-mediated spin-exchange interactions in an atomic ensemble. Interactions extending over a distance of 500 μm are generated within a cloud of cold rubidium atoms coupled to a single mode of light in an…
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Tunable spin–orbit coupling and symmetry-protected edge states in graphene/WS <sub>2</sub> Open
We demonstrate clear weak anti-localization (WAL) effect arising from induced Rashba spin–orbit coupling (SOC) in WS_2-covered single-layer and bilayer graphene devices. Contrary to the uncovered region of a shared single-layer graphene fl…
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Second-Order Topological Superconductivity in -Junction Rashba Layers Open
We consider a Josephson junction bilayer consisting of two tunnel-coupled two-dimensional electron gas layers with Rashba spin-orbit interaction, proximitized by a top and bottom s-wave superconductor with phase difference ϕ close to π. We…
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Zero-energy Andreev bound states from quantum dots in proximitized Rashba nanowires Open
We study an analytical model of a Rashba nanowire that is partially covered\nby and coupled to a thin superconducting layer, where the uncovered region of\nthe nanowire forms a quantum dot. We find that, even if there is no topological\nsu…
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Engineering Corner States from Two-Dimensional Topological Insulators Open
We theoretically demonstrate that the second-order topological insulator with robust corner states can be realized in two-dimensional Z_{2} topological insulators by applying an in-plane Zeeman field. The Zeeman field breaks the time-rever…
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Experimental Observation of a Topological Band Gap Opening in Ultracold Fermi Gases with Two-Dimensional Spin-Orbit Coupling Open
The recent experimental realization of synthetic spin-orbit coupling (SOC) opens a new avenue for exploring novel quantum states with ultracold atoms. However, in experiments for generating two-dimensional SOC (e.g., Rashba type), a perpen…
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Nearly massless Dirac fermions and strong Zeeman splitting in the nodal-line semimetal ZrSiS probed by de Haas–van Alphen quantum oscillations Open
Topological semimetals represent a new class of quantum materials hosting\nDirac/Weyl fermions. The essential properties of topological fermions can be\nrevealed by quantum oscillations. Here we present the first systematic de\nHaas-van Al…
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Scanning Tunneling Microscopy of theMagnetism of a Single Carbon Vacancy in Graphene Open
Pristine graphene is strongly diamagnetic. However, graphene with single carbon atom defects could exhibit paramagnetism. Theoretically, the π magnetism induced by the monovacancy in graphene is characteristic of two spin-split density-of-…
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A Luminescent Thermometer Exhibiting Slow Relaxation of the Magnetization: Toward Self-Monitored Building Blocks for Next-Generation Optomagnetic Devices Open
The development and integration of Single-Molecule Magnets (SMMs) into molecular electronic devices continue to be an exciting challenge. In such potential devices, heat generation due to the electric current is a critical issue that has t…
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Pseudospins and Topological Effects of Phonons in a Kekulé Lattice Open
The search for exotic topological effects of phonons has attracted enormous interest for both fundamental science and practical applications. By studying phonons in a Kekulé lattice, we find a new type of pseudospin characterized by quanti…
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How do phonons relax molecular spins? Open
The intramolecular components of acoustic phonons and the Zeeman interaction make electronic spins relax in an external field.
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π Berry phase and Zeeman splitting of Weyl semimetal TaP Open
The recent breakthrough in the discovery of Weyl fermions in monopnictide semimetals provides opportunities to explore the exotic properties of relativistic fermions in condensed matter. The chiral anomaly-induced negative magnetoresistanc…
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Direct Observation of Magnon-Phonon Strong Coupling in Two-Dimensional Antiferromagnet at High Magnetic Fields Open
We report the direct observation of strong coupling between magnons and phonons in a two-dimensional antiferromagnetic semiconductor FePS_{3}, via magneto-Raman spectroscopy at magnetic fields up to 30 Tesla. A Raman-active magnon at 121 c…
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Spin and Valley States in Gate-Defined Bilayer Graphene Quantum Dots Open
In bilayer graphene, electrostatic confinement can be realized by a suitable design of top and back gate electrodes. We measure electronic transport through a bilayer graphene quantum dot, which is laterally confined by gapped regions and …
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Twist-angle dependence of the proximity spin-orbit coupling in graphene on transition-metal dichalcogenides Open
We theoretically study the proximity spin-orbit coupling in graphene on\ntransition-metal dichalcogenides monolayer stacked with arbitrary twist angles.\nWe find that the relative rotation greatly enhances the spin splitting of\ngraphene, …
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Thermostability and photoluminescence of Dy(<span>iii</span>) single-molecule magnets under a magnetic field Open
A series of compounds [ADyL4]·[solvent] composed of a dysprosium(iii) ion coordinated by four chelated naphthyridine-like ligands (L = 4-hydroxy-8-methyl-1,5-naphthyridine-3-carbonitrile) and an alkali metal ion (A = Na, K, Rb, Cs) were sy…
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Robust non-Abelian spin liquid and a possible intermediate phase in the antiferromagnetic Kitaev model with magnetic field Open
In this work, we investigate the non-Abelian topological chiral spin-liquid phase in the two-dimensional Kitaev honeycomb model subject to a magnetic field. By combining density matrix renormalization group and exact diagonalization we stu…
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Valley Zeeman Splitting and Valley Polarization of Neutral and Charged Excitons in Monolayer MoTe<sub>2</sub> at High Magnetic Fields Open
Semiconducting transition metal dichalcogenides\n(TMDCs) give rise to interesting new phenomena in external magnetic\nfields, such as valley Zeeman splitting and magnetic-field-induced\nvalley polarization. These effects have been reported…
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Topological spin waves in the atomic-scale magnetic skyrmion crystal Open
We study the spin waves of the triangular skyrmion crystal that emerges in a two-dimensional spin lattice model as a result of the competition between Heisenberg exchange, Dzyalonshinkii-Moriya interactions, Zeeman coupling and uniaxial an…
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Vortex solitons in two-dimensional spin-orbit coupled Bose-Einstein condensates: Effects of the Rashba-Dresselhaus coupling and Zeeman splitting Open
We present an analysis of two-dimensional (2D) matter-wave solitons, governed by the pseudospinor system of Gross-Pitaevskii equations with self- and cross attraction, which includes the spin-orbit coupling (SOC) in the general Rashba-Dres…
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Quantum Anomalous Hall Effects in Graphene from Proximity-Induced Uniform and Staggered Spin-Orbit and Exchange Coupling Open
We investigate an effective model of proximity modified graphene (or symmetrylike materials) with broken time-reversal symmetry. We predict the appearance of quantum anomalous Hall phases by computing bulk band gap and Chern numbers for be…
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Decaying spectral oscillations in a Majorana wire with finite coherence length Open
Motivated by recent experiments, we investigate the excitation energy of a\nproximitized Rashba wire in the presence of a position dependent pairing. In\nparticular, we focus on the spectroscopic pattern produced by the overlap\nbetween tw…