Engineering the Eigenstates of Coupled Spin-1/2 Atoms on a Surface
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Título: | Engineering the Eigenstates of Coupled Spin-1/2 Atoms on a Surface |
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Autor/es: | Yang, Kai | Bae, Yujeong | Paul, William | Natterer, Fabian D. | Willke, Philip | Lado, Jose L. | Ferrón, Alejandro | Choi, Taeyoung | Fernández-Rossier, Joaquín | Heinrich, Andreas J. | Lutz, Christopher P. |
Grupo/s de investigación o GITE: | Grupo de Nanofísica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Magnetic interactions | Magnetism |
Área/s de conocimiento: | Física de la Materia Condensada |
Fecha de publicación: | 1-dic-2017 |
Editor: | American Physical Society |
Cita bibliográfica: | Physical Review Letters. 2017, 119: 227206. doi:10.1103/PhysRevLett.119.227206 |
Resumen: | Quantum spin networks having engineered geometries and interactions are eagerly pursued for quantum simulation and access to emergent quantum phenomena such as spin liquids. Spin-1/2 centers are particularly desirable, because they readily manifest coherent quantum fluctuations. Here we introduce a controllable spin-1/2 architecture consisting of titanium atoms on a magnesium oxide surface. We tailor the spin interactions by atomic-precision positioning using a scanning tunneling microscope (STM) and subsequently perform electron spin resonance on individual atoms to drive transitions into and out of quantum eigenstates of the coupled-spin system. Interactions between the atoms are mapped over a range of distances extending from highly anisotropic dipole coupling to strong exchange coupling. The local magnetic field of the magnetic STM tip serves to precisely tune the superposition states of a pair of spins. The precise control of the spin-spin interactions and ability to probe the states of the coupled-spin network by addressing individual spins will enable the exploration of quantum many-body systems based on networks of spin-1/2 atoms on surfaces. |
Patrocinador/es: | We gratefully acknowledge financial support from the Office of Naval Research. Y. B., P.W., T. C., and A. J. H. acknowledge support from IBSR027-D1.W. P. thanks the Natural Sciences and Engineering Research Council of Canada for fellowship support. F. D. N. appreciates support from the Swiss National Science Foundation under Project No. PZ00P2_167965. A. F. acknowledges Consejo Nacional de Investigaciones Científicas y Técnicas (PIP11220150100327) and Fondo para la Investigación Científica y Tecnológica (PICT-2012-2866). J. F.-R. and J. L. L. thank Marie Curie-Initial Training Networks (ITN) program through Grant No. 607904-SPINOGRAPH and Fundação para a Ciência e a Tecnologia (FCT), under the project “PTDC/FIS-NAN/4662/2014.” |
URI: | http://hdl.handle.net/10045/86493 |
ISSN: | 0031-9007 (Print) | 1079-7114 (Online) |
DOI: | 10.1103/PhysRevLett.119.227206 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2017 American Physical Society |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1103/PhysRevLett.119.227206 |
Aparece en las colecciones: | INV - Grupo de Nanofísica - Artículos de Revistas |
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