A quantum cavity for spin is created using a tungsten crystal as substrate of high nuclear charge and breaking the structural inversion symmetry through deposition of a gold quantum film. Spin- and angle-resolved photoelectron spectroscopy shows directly that quantum-well states and the "matrioshka" or Russian nested doll Fermi surface of the gold film are spin polarized and spin-orbit split up to a thickness of at least nine atomic layers. Ferromagnetic materials or external magnetic fields are not required, and the quantum film does not need to possess a high atomic number as analogous results with silver show.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.101.256601 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Refraction of the Two-Photon Multimode Field via a Three-Level Atom.
Entropy (Basel)
January 2025
Center for Nonlinear Sciences and Department of Physics, University of North Texas, Denton, TX 76203, USA.
Classically, the refractive index of a medium is due to a response on said medium from an electromagnetic field. It has been shown that a single two-level atom interacting with a single photon undergoes dispersion. The following extends that analyses to a three-level system interacting with two photons.
View Article and Find Full Text PDFCavity as radio telescope for galactic dark photon.
Sci Bull (Beijing)
January 2025
School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China; Center for High Energy Physics, Peking University, Beijing 100871, China; Key Laboratory of Particle Acceleration Physics and Technology, Chinese Academy of Sciences, Beijing 100049, China. Electronic address:
Dark photons, as a minimal extension of the Standard Model through an additional Abelian gauge group, may propagate relativistically across the galaxy, originating from dark matter decay or annihilation, thereby contributing to a galactic dark photon background. The generation of dark photons typically favors certain polarization modes, which are dependent on the interactions between dark matter and dark photons. We introduce a framework in which a resonant cavity is utilized to detect and differentiate these polarizations, leveraging the daily variation in expected signals due to the anisotropic distribution of dark photons and the rotation of the Earth.
View Article and Find Full Text PDFCavity-mediated iSWAP oscillations between distant spins.
Nat Phys
December 2024
QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Delft, Netherlands.
Direct interactions between quantum particles naturally fall off with distance. However, future quantum computing architectures are likely to require interaction mechanisms between qubits across a range of length scales. In this work, we demonstrate a coherent interaction between two semiconductor spin qubits 250 μm apart using a superconducting resonator.
View Article and Find Full Text PDFEnhanced Spontaneous Emission Rate and Luminescence Intensity of CsPbBr Quantum Dots Using a High- Microdisk Cavity.
J Phys Chem Lett
January 2025
State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, China.
Perovskite quantum dots (QDs) are high-efficiency optoelectronic materials attracting great interest, but further improvement in the luminescence efficiency is crucial for their application. In this work, we enhance both the spontaneous emission rate and the photoluminescence (PL) intensity of CsPbBr QDs by coupling them to a high quality () factor SiO microdisk cavity. Compared to conventional metal plasmonic cavities, the dielectric cavity structure suppresses the effects of quenching and energy transfer, which could introduce complex fluctuations and nonradiative decays.
View Article and Find Full Text PDFPutting 'STOP' to Excess Caries of Cleft Lip and Palate Patients.
Int Dent J
January 2025
Manav Rachna International Institute of Research and Studies(MRIIRS), Faridabad, India; Department of Conservative Dentistry and Endodontics, Manav Rachna Dental College, Faridabad, India.
Background: Cleft lip with/without palate (CL/P) patients require multiple interdisciplinary procedures at different phases of their life. CL/P patients have a high burden of care that has financial repercussion, especially in low- and middle-income countries (LMICs). Lowering preventable diseases such as caries can mitigate this challenge.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!