Zobrazeno 1 - 10
of 220
pro vyhledávání: '"Saparov, Bayrammurad"'
Autor:
van Roekeghem, Ambroise, Richard, Pierre, Shi, Xun, Wu, Shangfei, Zeng, Lingkun, Saparov, Bayrammurad, Ohtsubo, Yoshiyuki, Qian, Tian, Sefat, Athena S., Biermann, Silke, Ding, Hong
Publikováno v:
Phys. Rev. B 93, 245139 (2016)
We present a study of the tetragonal to collapsed-tetragonal transition of CaFe2As2 using angle-resolved photoemission experiments and dynamical mean field theory-based electronic structure calculations. We observe that the collapsed-tetragonal phase
Externí odkaz:
http://arxiv.org/abs/1505.00753
Autor:
Gu, Dachun, Dai, Xia, Le, Congcong, Sun, Liling, Wu, Qi, Saparov, Bayrammurad, Guo, Jing, Gao, Peiwen, Zhang, Shan, Zhou, Yazhou, Zhang, Chao, Xiong, Lun, Li, Rui, Li, Yanchun, Li, Xiaodong, Liu, Jing, Sefat, Athena S., Hu, Jiangping, Zhao, Zhongxian
Publikováno v:
Scientific Reports, 4 (2014) 7342
Here, we report that K-doped BaMn2Bi2 shows no experimental evidence of superconductivity down to 1.5 K under pressures up to 35.6 GPa, however, a tetragonal to an orthorhombic phase transition is observed at pressure of 20 GPa. Theoretical calculati
Externí odkaz:
http://arxiv.org/abs/1404.5030
Autor:
Saparov, Bayrammurad, Cantoni, Claudia, Pan, Minghu, Hogan, Thomas C., Ratcliff II, William, Wilson, Stephen D., Fritsch, Katharina, Gaulin, Bruce D., Sefat, Athena S.
Publikováno v:
Scientific Reports 2014, 4, 4120
The interplay between magnetism and crystal structures in three CaFe$_{2}$As$_{2}$ samples is studied. For the nonmagnetic quenched crystals, different crystalline domains with varying lattice parameters are found, and three phases (orthorhombic, tet
Externí odkaz:
http://arxiv.org/abs/1402.4358
Autor:
Gofryk, Krzysztof, Pan, Minghu, Cantoni, Claudia, Saparov, Bayrammurad, Mitchell, Jonathan E., Sefat, Athena S.
Publikováno v:
Phys. Rev. Lett. 112, 047005 (2014)
We use multi-scale techniques to determine the extent of local inhomogeneity and superconductivity in Ca$_{0.86}$Pr$_{0.14}$Fe$_{2}$As$_{2}$ single crystal. The inhomogeneity is manifested as a spatial variation of praseodymium concentration, local d
Externí odkaz:
http://arxiv.org/abs/1401.1427
Publikováno v:
Scientific Reports 3 (2013) 2154
New fluoropnictides BaMnPnF with Pn = As, Sb, Bi, are synthesized by stoichiometric reaction of elements with BaF\_2. The compounds crystallize in the tetragonal P4/nmm (No. 129, Z = 2) space group, with the ZrCuSiAs-type structure, as indicated by s
Externí odkaz:
http://arxiv.org/abs/1306.5182
Autor:
Saparov, Bayrammurad, Sefat, Athena S.
Publikováno v:
Journal of Solid State Chemistry 2013, 204, 32-39
This is a report on the new 122 ternary transition-metal pnictide of BaMn2Bi2, which is crystallized from bismuth flux. BaMn2Bi2 adopts ThCr2Si2-type structure (I4/mmm) with a = 4.4902(3) {\AA} and c = 14.687(1) {\AA}; it is antiferromagnetic with an
Externí odkaz:
http://arxiv.org/abs/1303.2695
Autor:
Mitchell, Jonathan E., Saparov, Bayrammurad, Lin, Wenzhi, Calder, Stuart, Li, Qing, Kalinin, Sergei V., Pan, Minghu, Christianson, Andrew D., Sefat, Athena S.
Publikováno v:
Phys. Rev. B 86 (2012), 174511
Single crystals of mixed alkaline earth metal iron arsenide materials of Ba1-xSrxFe2As2 and Ba0.5Sr0.5(Fe1-yCoy)2As2 are synthesized via the self-flux method. Ba1-xSrxFe2As2 display spin-density wave features (TN) at temperatures intermediate to the
Externí odkaz:
http://arxiv.org/abs/1210.6638
Autor:
Sefat, Athena S., Marty, Karol, Christianson, Andrew D., Saparov, Bayrammurad, McGuire, Michael A., Lumsden, Mark D., Tien, Wei, Sales, Brian C.
Publikováno v:
PRB 85, 024503 (2012)
We investigate the thermodynamic and transport properties of molybdenum-doped BaFe2As2 (122) crystals, the first report of hole doping using a 4d element. The chemical substitution of Mo in place of Fe is possible up to ~ 7%. For Ba(Fe1-xMox)2As2, th
Externí odkaz:
http://arxiv.org/abs/1110.4390
Autor:
Saparov, Bayrammurad, Calder, Stuart, Sipos, Balazs, Cao, Huibo, Chi, Songxue, Singh, David J., Christianson, Andrew D., Lumsden, Mark D., Sefat, Athena S.
Publikováno v:
Phys. Rev. B 84, 245132 (2011)
We investigate the physical properties and electronic structure of BaFe2-{\delta}Se3 crystals, which were grown out of tellurium flux. The crystal structure of the compound, an iron-deficient derivative of the ThCr2Si2-type, is built upon edge-shared
Externí odkaz:
http://arxiv.org/abs/1110.2439
Optoelectronic properties of candidate photovoltaic Cu2PbSiS4, Ag2PbGeS4 and KAg2SbS4 semiconductors
Autor:
Nhalil, Hariharan, Han, Dan, Du, Mao-Hua, Chen, Shiyou, Antonio, Daniel, Gofryk, Krzysztof, Saparov, Bayrammurad
Publikováno v:
In Journal of Alloys and Compounds 25 May 2018 746:405-412