Electronic Resource
Observing Atomic Collapse Resonances in Artificial Nuclei on Graphene
| العنوان: | Observing Atomic Collapse Resonances in Artificial Nuclei on Graphene |
|---|---|
| المؤلفون: | CALIFORNIA UNIV BERKELEY DEPT OF PHYSICS, Wang, Yang, Wong, Dillon, Shytov, Andrey V, Brar, Victor W, Choi, Sangkook, Wu, Qiong, Tsai, Hsin-Zon, Regan, William, Zettl, Alex, Kawakami, Roland K |
| المصدر: | DTIC |
| بيانات النشر: | 2013-03-07 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Relativistic quantum mechanics predicts that when the charge of a super-heavy atomic nucleus surpasses a certain threshold, the resulting strong Coulomb field causes an unusual atomic collapse state which exhibits an electron wave function component that falls toward the nucleus as well as a positron component that escapes to infinity. In graphene, where charge carriers behave as massless relativistic particles, it has been predicted that highly charged impurities should exhibit resonances corresponding to these atomic collapse states. We have observed the formation of such resonances around artificial nuclei (clusters of charged calcium dimers) fabricated on gated graphene devices via atomic manipulation with a scanning tunneling microscope (STM). The energy and spatial dependence of the atomic collapse state measured using STM revealed unexpected behavior when it is occupied by electrons. Published in Sciencexpress, 7 Mar 2013. Prepared in collaboration with the Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, the School of Physics, University of Exeter, UK, the Department of Physics, Massachusetts Institute of Technology, Cambridge, and the Department of Physics and Astronomy, University of California, Riverside. |
| مصطلحات الفهرس: | Atomic and Molecular Physics and Spectroscopy, Nuclear Physics & Elementary Particle Physics, ATOMS, GRAPHENE, NUCLEI, ATOMIC CHARGE, DIMERS, ELECTRONS, IMPURITIES, MICROSCOPY, QUANTUM THEORY, RESONANCE, ATOMIC COLLAPSE RESONANCES, ARTIFICIAL NUCLEI, QUANTUM MECHANICS, COULOMB FIELDS, STM(SCANNING TUNNELING MICROSCOPES), DIRAC POINTS, Text |
| URL: | |
| الاتاحة: | Open access content. Open access content Approved for public release; distribution is unlimited. |
| ملاحظة: | text/html English |
| Other Numbers: | DTICE ADA587152 872736829 |
| المصدر المساهم: | From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.ocn872736829 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |