Electronic structures of diboride compounds: AgB2 and AuB2
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- Title
- Electronic structures of diboride compounds: AgB2 and AuB2
- Authors
- Kwon, SK; Min, BI; Youn, SJ; Kim, KS
- Date Issued
- 2005-06
- Publisher
- KOREAN PHYSICAL SOC
- Abstract
- Based on electronic structure calculations, we have found that noble metal diborides, AgB2 and AuB2, are potential candidates for conventional BCS-type high-temperature superconductors. The B 2p density of states dominates at the Fermi level in comparison with the Ag 4d and the An 5d states. Furthermore, the electron-phonon coupling constant A is much larger in AgB2 and AuB2 than in MgB2. Estimated transition temperatures for AgB2 and AuB2 are T-c(cal) = 59 K and 72 K, respectively. These are about 2 similar to 3 times higher than the estimated T-c(cal) = 27 K in MgB2 and are almost comparable to those in cuprate superconductors.
- Keywords
- diboride; MgB2; superconductor; electronic structure; CRITICAL-CURRENT DENSITY; SUPERCONDUCTING MGB2; TRANSITION-TEMPERATURE; MAGNESIUM-DIBORIDE; THIN-FILMS; BORON; FIELD; WIRES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/24542
- ISSN
- 0374-4884
- Article Type
- Article
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 46, no. 6, page. L1295 - L1298, 2005-06
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