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| Author | Wang, J.; Van Pottelberge, R.; Zhao, W.-S.; Peeters, F.M. | ||||
| Title | Coulomb impurity on a Dice lattice : atomic collapse and bound states | Type | A1 Journal article | ||
Year  |
2022 | Publication | Physical review B | Abbreviated Journal | Phys Rev B |
| Volume | 105 | Issue | 3 | Pages | 035427 |
| Keywords | A1 Journal article; Condensed Matter Theory (CMT) | ||||
| Abstract | The modification of the quantum states in a Dice lattice due to a Coulomb impurity are investigated. The energy-band structure of a pristine Dice lattice consists of a Dirac cone and a flat band at the Dirac point. We use the tight-binding formalism and find that the flat band states transform into a set of discrete bound states whose electron density is localized on a ring around the impurity mainly on two of the three sublattices. Its energy is proportional to the strength of the Coulomb impurity. Beyond a critical strength of the Coulomb potential atomic collapse states appear that have some similarity with those found in graphene with the difference that the flat band states contribute with an additional ringlike electron density that is spatially decoupled from the atomic collapse part. At large value of the strength of the Coulomb impurity the flat band bound states anticross with the atomic collapse states. | ||||
| Address | |||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Wos | 000749375200002 | Publication Date | 2022-01-28 | |
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 2469-9969; 2469-9950 | ISBN | Additional Links | UA library record; WoS full record; WoS citing articles | |
| Impact Factor | 3.7 | Times cited | 1 | Open Access | Not_Open_Access |
| Notes | Approved | Most recent IF: 3.7 | |||
| Call Number | UA @ admin @ c:irua:186387 | Serial | 6977 | ||
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