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Structure of Cr monolayer on Ag(001): A buried two-dimensional c(2 x 2) antiferromagnet

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dc.contributor.author Das, Jayanta
dc.contributor.author Biswas, Sananda
dc.contributor.author Kundu, Asish K.
dc.contributor.author Narasimhan, Shobhana
dc.contributor.author Menon, Krishnakumar S. R.
dc.date.accessioned 2016-10-28T06:00:17Z
dc.date.available 2016-10-28T06:00:17Z
dc.date.issued 2015
dc.identifier.citation Physical Review B en_US
dc.identifier.citation 91 en_US
dc.identifier.citation 12 en_US
dc.identifier.citation Das, J.; Biswas, S.; Kundu, A. K.; Narasimhan, S.; Menon, K. S. R., Structure of Cr monolayer on Ag(001): A buried two-dimensional c(2 x 2) antiferromagnet. Physical Review B 2015, 91 (12), 8. en_US
dc.identifier.issn 1098-0121
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/1924
dc.description Restricted access en_US
dc.description.abstract The growth, morphology, and magnetic structure of ultrathin Cr films grown on a Ag(001) substrate are studied using low-energy electron diffraction (LEED), angle-resolved photoemission spectroscopy (ARPES), and ab initio density functional theory (DFT) calculations. The presence and temperature dependence of c(2 x 2) half-order spots in the LEED pattern, for low electron energies, along with the presence of characteristic Cr 3d bands in the ARPES spectra, confirm the existence of antiferromagnetic ordering for the Cr monolayer case. Our experiments are also consistent with the presence of a p(1 x 1) Ag overlayer on top of the Cr layer, suggesting the existence of a Ag/Cr/Ag(001) sandwich structure at the surface. Our DFT calculations confirm that this is the most favored geometric and magnetic structure of the system. The Cr layer is found to retain a "two-dimensional" character with enhanced Cr 3d magnetic moments, despite being buried below a Ag monolayer, due to the absence of significant hybridization between Cr 3d and Ag 4d electronic states. The coverage dependence of the magnetic ordering indicates a maximum ordering above the expected monolayer coverage, possibly due to intermixing between Ag and Cr atoms in the overlayer. en_US
dc.description.uri 1550-235X en_US
dc.description.uri http://dx.doi.org/10.1103/PhysRevB.91.125435 en_US
dc.language.iso English en_US
dc.publisher American Physical Society en_US
dc.rights ?American Physical Society, 2015 en_US
dc.subject Condensed Matter Physics en_US
dc.subject Scanning-Tunneling-Microscopy en_US
dc.subject Transition-Metal Monolayers en_US
dc.subject Energy Electron-Diffraction en_US
dc.subject Initial Growth Mode en_US
dc.subject Ag(100) en_US
dc.subject Surface en_US
dc.subject Ferromagnetism en_US
dc.subject Photoemission en_US
dc.subject Overlayers en_US
dc.subject Interfaces en_US
dc.title Structure of Cr monolayer on Ag(001): A buried two-dimensional c(2 x 2) antiferromagnet en_US
dc.type Article en_US


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