Transition-metal dichalcogenides (TMDs) are direct-gap semiconductors that can host optically bright excitons corresponding to Coulomb-bound electron–hole pairs. Due to the two-dimensional nature of TMDs, along with the large effective masses…
Category: 4. Physics
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Quantum transport protected by acceleration from nonadiabaticity and dissipation
General scenario
We consider a wavepacket describing a quantum single- or multi-partite system of mass m, in a trapping potential V[x − x∘(t)], whose center (minimum) position x∘(t) is driven by an external force. It is immeresed in a bath…
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Gapped commensurate antiferromagnetic response in a strongly underdoped model cuprate superconductor
Uchida, S. et al. Optical spectra of La2-xSrxCuO4: effect of carrier doping on the electronic structure of the CuO2 plane. Phys. Rev. B. 43, 7942 (1991).
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Vaknin, D. et al….
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Magnetically stimulated transient creep processes in a heterogeneous aluminum alloy with ferromagnetic inclusions
In materials science, creep (also referred to as cold flow) describes the ability of a solid to undergo slow, time-dependent deformation under constant mechanical stress. Typically, this occurs under prolonged exposure to stress levels below the…
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Versatile photonic frequency synthetic dimensions using a single programmable on-chip device
Theoretical framework
Design of the couplings among the lattice network points is one of the core ingredients of the configuration of physical models, specifically, both the coupled modes and coupling range are required to be tuned appropriately….
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Near dipole-dipole interaction induced control of high-precision three-dimensional atom localization via probe absorption in a four-level phase-coherent atomic medium
The field-coupled energy-level configuration of our four-level scheme is shown in Fig. 1a, where the dipole allowed transitions \({|{1}\rangle }\)–\({|{2}\rangle }\), \({|{2}\rangle }\)–\({|{3}\rangle }\) and \({|{2}\rangle }\)–\({|{4}\rangle…
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Dynamic control of X-ray core-exciton resonances by Coulomb screening in photoexcited semiconductors
Ab initio approach to XTA spectra
The theoretical method developed here goes beyond the standard BSE, by incorporating time-dependent carrier densities and distributions in photoexcited states obtained through cDFT and RT-TDDFT (Fig. 1b). The…
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Azimuthal anisotropy induced by partial flux-closure in self-assembled tubular permalloy membranes
Sample design and self-assembly of tubular structures
The fabrication of planar NiFe structures on a shapeable polymeric platform enables their self-assembly into three-dimensional tubular architectures. This platform consists of…
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A graphene/H-BN van der Waals heterostructure enabling superior (>30 dB) electrical tuning in terahertz devices
Nagatsuma, T., Ducournau, G. & Renaud, C. C. Advances in terahertz communications accelerated by photonics. Nat. Photonics 10, 371–379 (2016).
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Yang, Y. et al. Terahertz topological…
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