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Unconventional and Fragile Magnetic Exciton in a van der Waals Quantum Magnet [13.59048909013339]
We find that the sharp photoluminescence peak is drastically suppressed by as little as 0.4 GPa and completely quenched by 1.5 GPa.<n>This bright-to-dark conversion occurs without magnetic, crystallographic, or electronic reconstruction despite an increase in the temperature.<n>Our results demonstrate that the optical brightness of the magnetic exciton is independent of chemical disorder, lattice expansion, and weakening of magnetic order.
arXiv Detail & Related papers (2026-07-30T05:26:56Z)
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Emergence of Diverse Topological States in Ge Doped MnBi2Te4 [35.56261187819994]
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arXiv Detail & Related papers (2025-05-28T13:30:31Z)
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Quasi-deterministic Localization of Er Emitters in Thin Film TiO$_2$ through Submicron-scale Crystalline Phase Control [5.011073409107404]
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Coherent sources exploiting quantum systems have proven indispensable for advancing fundamental research and engineering. Here, we propose a mechanism of simultaneously realizing the stimulated emission of radiation in the visible and microwave bands. Our work shows a great promise on immediate realization of multiband coherent sources.
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A first-principles calculation of electron-phonon interactions for the $\text{C}_2\text{C}_\text{N}$ and $\text{V}_\text{N}\text{N}_\text{B}$ defects in hexagonal boron nitride [52.77024349608834]
Quantum emitters in two-dimensional hexagonal boron nitride (h-BN) have generated significant interest. Recent observations of Fourier transform (FT) limited photons emitted from h-BN flakes at room temperature.
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Magnetic-field resilience of 3D transmons with thin-film Al/AlO$_x$/Al Josephson junctions approaching 1 T [0.0]
We investigate the effect of in-plane magnetic fields up to 1 T on the spectrum and coherence times of thin-film 3D aluminum transmons. Thin-film aluminum Josephson junctions are a suitable hardware for superconducting circuits in the high-magnetic-field regime.
arXiv Detail & Related papers (2021-11-01T17:43:15Z)
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We analyze the emission properties of excitons in TMDCs near planar metal interfaces. We find suppression or enhancement of emission relative to the point dipole case by several orders of magnitude. nanoscale optical cavities are a viable pathway to generating long-lifetime exciton states in TMDCs.
arXiv Detail & Related papers (2021-10-11T19:40:24Z)
Position-controlled quantum emitters with reproducible emission wavelength in hexagonal boron nitride [45.39825093917047]
Single photon emitters (SPEs) in low-dimensional layered materials have recently gained a large interest owing to the auspicious perspectives of integration and extreme miniaturization. Here, we evidence SPEs in high purity synthetic hexagonal boron nitride (hBN) that can be activated by an electron beam at chosen locations. Our findings constitute an essential step towards the realization of top-down integrated devices based on identical quantum emitters in 2D materials.
arXiv Detail & Related papers (2020-11-24T17:20:19Z)
The Stark effect in superfluid $^4$He with relative flows [0.0]
Stark-type effect is observed in superfluid $4$He in presence of relative laminar flows. Line of absorption/radiation is observed in the EM spectrum, the frequency of which - 180 GHz - corresponds to the roton minimum.
arXiv Detail & Related papers (2020-09-13T16:26:32Z)

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