Journal
EPL
Volume 114, Issue 4, Pages -Publisher
EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
DOI: 10.1209/0295-5075/114/47012
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Funding
- Fundamental Research Funds for the Central Universities
- National Natural Science Foundation of China [11374237]
- HPCC Platform of Xi'an Jiaotong University
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Using density-functional-based methods, we have studied 2p-based magnetic moments and magnetic coupling in potassium (K)-doped ZnO monolayer. We find that the substitution of a K atom at a Zn site in a ZnO monolayer induces a magnetic moment of 1.0 mu(B) per cell mainly originating from the O-2p states and has much lower formation energy than a magnetic Zn vacancy. A half-metallic electronic property and long-range ferromagnetic coupling between the magnetic moments are obtained based on the generalized gradient approximation (GGA) calculations, which is explained by a double-exchange-like mechanism. Moreover, with stronger correlation correction on 2p states, the structure of the substitutional K impurity undergoes a Jahn-Teller-like distortion. Incorporating magnetism into a two-dimensional ZnO monolayer will promote its application in nanodevices. Copyright (C) EPLA, 2016
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