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| Author | Moldovan, D.; Peeters, F.M. | ||||
| Title | Atomic Collapse in Graphene | Type | P1 Proceeding | ||
| Year | 2016 | Publication | Nanomaterials For Security | Abbreviated Journal | |
| Volume | Issue | Pages | 3-17 | ||
| Keywords | P1 Proceeding; Engineering sciences. Technology; Condensed Matter Theory (CMT) | ||||
| Abstract | When the charge Z of an atom exceeds the critical value of 170, it will undergo a process called atomic collapse which triggers the spontaneous creation of electron-positron pairs. The high charge requirements have prevented the observation of this phenomenon with real atomic nuclei. However, thanks to the relativistic nature of the carriers in graphene, the same physics is accessible at a much lower scale. The atomic collapse analogue in graphene is realized using artificial nuclei which can be created via the deposition of impurities on the surface of graphene or using charged vacancies. These supercritically charged artificial nuclei trap electrons in a sequence of quasi-bound states which can be observed experimentally as resonances in the local density of states. | ||||
| Address | |||||
| Corporate Author | Thesis | ||||
| Publisher | Springer | Place of Publication | Dordrecht | Editor | |
| Language | Wos | 000386506200001 | Publication Date | 2016-07-20 | |
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
ISSN  |
978-94-017-7593-9; 978-94-017-7591-5 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
| Impact Factor | Times cited | 3 | Open Access | ||
| Notes | ; ; | Approved | Most recent IF: NA | ||
| Call Number | UA @ lucian @ c:irua:138237 | Serial | 4348 | ||
| Permanent link to this record | |||||
| Author | Milovanović, S.P.; Peeters, F.M. | ||||
| Title | Strained graphene structures : from valleytronics to pressure sensing | Type | P1 Proceeding | ||
| Year | 2018 | Publication | Nanostructured Materials For The Detection Of Cbrn | Abbreviated Journal | |
| Volume | Issue | Pages | 3-17 T2 - NATO Advanced Research Workshop on Nanos | ||
| Keywords | P1 Proceeding; Pharmacology. Therapy; Engineering sciences. Technology; Condensed Matter Theory (CMT) | ||||
| Abstract | Due to its strong bonds graphene can stretch up to 25% of its original size without breaking. Furthermore, mechanical deformations lead to the generation of pseudo-magnetic fields (PMF) that can exceed 300 T. The generated PMF has opposite direction for electrons originating from different valleys. We show that valley-polarized currents can be generated by local straining of multi-terminal graphene devices. The pseudo-magnetic field created by a Gaussian-like deformation allows electrons from only one valley to transmit and a current of electrons from a single valley is generated at the opposite side of the locally strained region. Furthermore, applying a pressure difference between the two sides of a graphene membrane causes it to bend/bulge resulting in a resistance change. We find that the resistance changes linearly with pressure for bubbles of small radius while the response becomes non-linear for bubbles that stretch almost to the edges of the sample. This is explained as due to the strong interference of propagating electronic modes inside the bubble. Our calculations show that high gauge factors can be obtained in this way which makes graphene a good candidate for pressure sensing. | ||||
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| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Wos | 000477758900001 | Publication Date | 2018-07-11 | |
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN |
978-94-024-1306-9; 978-94-024-1304-5; 978-94-024-1303-8; 978-94-024-1303-8 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
| Impact Factor | Times cited | 6 | Open Access | ||
| Notes | Approved | no | |||
| Call Number | UA @ admin @ c:irua:161972 | Serial | 8583 | ||
| Permanent link to this record | |||||