Quantum control techniques play an important role in manipulating and harnessing the properties of different quantum systems, including isolated atoms. Here, we propose to achieve quantum control over a single on-surface atomic spin using Landau-Zener-Stückelberg-Majorana (LZSM) interferometry implemented with scanning tunneling microscopy (STM). Specifically, we model how the application of time-dependent, nonresonant ac electric fields across the STM tip-surface gap makes it possible to achieve precise quantum state manipulation in an isolated Fe^{2+} ion on a MgO/Ag(100) surface. We propose a protocol to combine Landau-Zener tunneling with LZSM interferometry that permits one to measure the quantum spin tunneling of an individual Fe^{2+} ion. The proposed experiments can be implemented with ESR-STM instrumentation, opening a new venue in the research of on-surface single spin control.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.134.056703 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Emission Enhancement of ZnO Thin Films in Ultraviolet Wavelength Region Using Au Nano-Hemisphere on Al Mirror Structures.
Nanomaterials (Basel)
March 2025
Department of Physics and Electronics, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai 599-8531, Osaka, Japan.
Using a heterogeneous metal Nano Hemisphere on Mirror (NHoM) structure, composed of an AlO thin film and Au nano-hemispheres formed on a thick Al film, we successfully generated two distinct surface plasmon resonance (SPR) peaks: one in the ultraviolet (UV) wavelength range below 400 nm and another in the visible range between 600 and 700 nm. This NHoM structure can be fabricated through a straightforward process involving deposition, sputtering, and annealing, enabling rapid, large-area formation. By adjusting the thickness of the AlO spacer layer in the NHoM structure, we precisely controlled the localized surface plasmon resonance (LSPR) wavelength, spanning a wide range from the UV to the visible spectrum.
View Article and Find Full Text PDFOptical Nonreciprocity Based on the Four-Wave Mixing Effect in Semiconductor Quantum Dots.
Nanomaterials (Basel)
March 2025
School of Physics, East China University of Science and Technology, Shanghai 200237, China.
Optical nonreciprocity and nonreciprocal devices such as optical diodes have broad and promising applications in various fields, ranging from optical communication to signal process. Here, we propose a magnet-free nonreciprocal scheme based on the four-wave mixing (FWM) effect in semiconductor quantum dots (SQDs). Via controlling the directions of the coupling fields, the probe field can achieve high transmission in the forward direction within a certain frequency range due to the FWM effect.
View Article and Find Full Text PDFStereodynamics of cold HD and D2 collisions with He.
J Chem Phys
March 2025
Department of Chemistry and Biochemistry, University of Nevada, Las Vegas, Nevada 89154, USA.
We present a comprehensive quantum mechanical study of stereodynamic control of HD + He and D2 + He collisions that have been probed experimentally by Perreault et al. [J. Phys.
View Article and Find Full Text PDFSwitching on and off the spin polarization of the conduction band in antiferromagnetic bilayer transistors.
Nat Nanotechnol
March 2025
Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland.
Antiferromagnetic conductors with suitably broken spatial symmetries host spin-polarized bands, which lead to transport phenomena commonly observed in metallic ferromagnets. In bulk materials, it is the given crystalline structure that determines whether symmetries are broken and spin-polarized bands are present. Here we show that, in the two-dimensional limit, an electric field can control the relevant symmetries.
View Article and Find Full Text PDFElectric Field Control of Magnetic Skyrmion Helicity in a Centrosymmetric 2D van der Waals Magnet.
Nano Lett
March 2025
Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Upton, New York 11973, United States.
Two-dimensional van der Waals magnets hosting topological magnetic textures, such as skyrmions, show promise for spintronics and quantum computing. Electrical control of these topological spin textures is crucial for enhancing operational performance and functionality. Here, using electron microscopy combined with electric and magnetic biasing, we show that the skyrmion helicity in insulating CrGeTe can be controlled by the direction of the external electric field applied during the field cooling process.
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!