FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2103460367> ?p ?o ?g. }

• W2103460367 abstract "Large scale density-functional theory calculations have been performed to understand the spatial distribution and magnetic coupling of Cr-doped GaN, in which exhaustive structural and magnetic configurations have been investigated by doping of up to five Cr atoms in large supercells. Our results provide direct evidence that the distribution of the doped magnetic ions is neither homogeneous nor random as widely assumed previously. Rather, under both Ga-rich and N-rich growth conditions, the Cr atoms have a strong tendency to form substitutional, embedded clusters with short-range magnetic interactions maintaining the wurtzite structure. Significantly, while the ferromagnetic state is favored for pair doping, for more than two-Cr-atom clustering configurations, states containing antiferromagnetic or ferrimagnetic coupling with net spins in the range of $0.06--1.47{ensuremath{mu}}_{B}∕mathrm{Cr}$ are preferred. The formation of embedded clusters leads to notable local structural distortions and considerable magnetic moments on the Cr-bonded N atoms. Also importantly, the electrical properties (metallic, half-metallic, or semiconducting) are found to strongly depend on the dopant concentration. We propose a picture where various cluster configurations coexist and the statistical distribution and associated magnetism depend sensitively on sample growth details. The results obtained are in agreement with recent experiments. Such a view can explain many hitherto puzzling experimental observations, e.g., the much lower value of the measured mean saturation magnetic moment on Cr as compared to the theoretically predicted value for the isolated dopants; the anomalous lattice constant change in relation to the dopant concentration and temperature; and the strong dependence of the magnetization on the Cr concentration, growth temperature, and annealing. We find a similar behavior for Mn in GaN and Cr and Mn in AlN and argue that such a scenario may also hold for other dilute magnetic semiconductor systems." @default.
• W2103460367 created "2016-06-24" @default.
• W2103460367 creator A5010664564 @default.
• W2103460367 creator A5042480081 @default.
• W2103460367 creator A5045668012 @default.
• W2103460367 creator A5066876837 @default.
• W2103460367 creator A5082469506 @default.
• W2103460367 date "2007-04-20" @default.
• W2103460367 modified "2023-09-23" @default.
• W2103460367 title "Spatial distribution and magnetism in poly-Cr-doped GaN from first principles" @default.
• W2103460367 cites W1550698291 @default.
• W2103460367 cites W1580590920 @default.
• W2103460367 cites W1615060104 @default.
• W2103460367 cites W1624121337 @default.
• W2103460367 cites W1667105503 @default.
• W2103460367 cites W1964449179 @default.
• W2103460367 cites W1965556452 @default.
• W2103460367 cites W1965752441 @default.
• W2103460367 cites W1966750682 @default.
• W2103460367 cites W1969200114 @default.
• W2103460367 cites W1974366222 @default.
• W2103460367 cites W1974405946 @default.
• W2103460367 cites W1974985411 @default.
• W2103460367 cites W1976699960 @default.
• W2103460367 cites W1977357586 @default.
• W2103460367 cites W1981368803 @default.
• W2103460367 cites W1981783962 @default.
• W2103460367 cites W1983941341 @default.
• W2103460367 cites W1983952300 @default.
• W2103460367 cites W1985036808 @default.
• W2103460367 cites W1986263558 @default.
• W2103460367 cites W1986607053 @default.
• W2103460367 cites W1988889941 @default.
• W2103460367 cites W1990461896 @default.
• W2103460367 cites W1990730205 @default.
• W2103460367 cites W1991388146 @default.
• W2103460367 cites W1997092368 @default.
• W2103460367 cites W1998297860 @default.
• W2103460367 cites W1999321619 @default.
• W2103460367 cites W1999934302 @default.
• W2103460367 cites W2005195374 @default.
• W2103460367 cites W2005726323 @default.
• W2103460367 cites W2006074908 @default.
• W2103460367 cites W2007228494 @default.
• W2103460367 cites W2008937980 @default.
• W2103460367 cites W2012817868 @default.
• W2103460367 cites W2014429397 @default.
• W2103460367 cites W2015189864 @default.
• W2103460367 cites W2015773728 @default.
• W2103460367 cites W2016204275 @default.
• W2103460367 cites W2016577825 @default.
• W2103460367 cites W2016789515 @default.
• W2103460367 cites W2021438705 @default.
• W2103460367 cites W2022137501 @default.
• W2103460367 cites W2023572144 @default.
• W2103460367 cites W2026008408 @default.
• W2103460367 cites W2031427556 @default.
• W2103460367 cites W2032843489 @default.
• W2103460367 cites W2035120806 @default.
• W2103460367 cites W2035736450 @default.
• W2103460367 cites W2036113194 @default.
• W2103460367 cites W2036197910 @default.
• W2103460367 cites W2038129484 @default.
• W2103460367 cites W2038705950 @default.
• W2103460367 cites W2038917230 @default.
• W2103460367 cites W2041808360 @default.
• W2103460367 cites W2041898073 @default.
• W2103460367 cites W2042473487 @default.
• W2103460367 cites W2043390423 @default.
• W2103460367 cites W2044373270 @default.
• W2103460367 cites W2052598958 @default.
• W2103460367 cites W2056777735 @default.
• W2103460367 cites W2060400063 @default.
• W2103460367 cites W2063061207 @default.
• W2103460367 cites W2063348446 @default.
• W2103460367 cites W2065666308 @default.
• W2103460367 cites W2072498628 @default.
• W2103460367 cites W2073668092 @default.
• W2103460367 cites W2074945572 @default.
• W2103460367 cites W2077914558 @default.
• W2103460367 cites W2079219705 @default.
• W2103460367 cites W2080681272 @default.
• W2103460367 cites W2084168637 @default.
• W2103460367 cites W2084198104 @default.
• W2103460367 cites W2086425086 @default.
• W2103460367 cites W2086679580 @default.
• W2103460367 cites W2086705539 @default.
• W2103460367 cites W2089017005 @default.
• W2103460367 cites W2089368415 @default.
• W2103460367 cites W2092057284 @default.
• W2103460367 cites W2092543090 @default.
• W2103460367 cites W2093524604 @default.
• W2103460367 cites W2109791997 @default.
• W2103460367 cites W2113616633 @default.
• W2103460367 cites W2130005505 @default.
• W2103460367 cites W2171878008 @default.
• W2103460367 cites W2328641541 @default.
• W2103460367 cites W2593735198 @default.
• W2103460367 cites W3022095807 @default.
• W2103460367 cites W3105179793 @default.

• next