Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Freelon, B"'
Autor:
Karki, B., Alfailakawi, A., Frandsen, Benjamin A., Everett, M. S., Neuefeind, J. C., Xu, Binjie, Wang, Hangdong, Fang, Minghu, Freelon, B.
Publikováno v:
Phys. Rev. B 104, 064101 (2021)
We describe the local structural properties of the iron oxychalcogenides, La$_2$O$_2$Fe$_2$O$M_2$ ($M$ = S, Se), by using pair distribution function (PDF) analysis applied to total scattering data. Our results of neutron powder diffraction show that
Externí odkaz:
http://arxiv.org/abs/2002.10305
Autor:
Freelon, B., Yamani, Z., Swainson, Ian, Flauca, R., Liu, Yu Hao, Craco, L., Laad, M. S., Wang, Meng, Chen, Jiaqi, Birgeneau, R. J., Fang, Minghu
Publikováno v:
Phys. Rev. B 99, 024109 (2019)
We present the results of structural and magnetic phase comparisons of the iron oxychalcogenides La$_{2}$O$_{2}$Fe$_{2}$O$M$$_{2}$ ($M$ = S, Se). Elastic neutron scattering reveals that $M$ = S and Se have similar nuclear structures at room and low t
Externí odkaz:
http://arxiv.org/abs/1801.00342
Autor:
Freelon, B., Sarkar, R., Kamusella, S., Brückner, F., Grinenko, V., Acharya, Swagata, Laad, Mukul, Craco, Luis, Yamani, Zahra, Flacau, Roxana, Swainson, Ian, Frandsen, Benjamin, Birgeneau, Robert, Liu, Yuhao, Karki, Bhupendra, Alfailakawi, Alaa, Neuefeind, Joerg C., Everett, Michelle, Wang, Hangdong, Xu, Binjie, Fang, Minghu, Klauss, H. -H.
Nematic fluctuations occur in a wide range of physical systems from liquid crystals to biological molecules to solids such as exotic magnets, cuprates and iron-based high-$T_c$ superconductors. Nematic fluctuations are thought to be closely linked to
Externí odkaz:
http://arxiv.org/abs/1708.01693
Autor:
Freelon, B., Liu, Yu Hao, Chen, Jeng-Lung, Craco, L., Laad, M. S., Leoni, S., Chen, Jiaqi, Tao, Li, Wang, Hangdong, Flauca, R., Yamani, Z., Fang, Minghu, Chang, Chinglin, Guo, J. -H., Hussain, Z.
Publikováno v:
Phys. Rev. B 92, 155139 (2015)
We perform a combined experimental-theoretical study of the Fe-oxychalcogenides (FeO$\emph{Ch}$) series La$_{2}$O$_{2}$Fe$_{2}$O\emph{M}$_{2}$ (\emph{M}=S, Se), which is the latest among the Fe-based materials with the potential \ to show unconventio
Externí odkaz:
http://arxiv.org/abs/1501.00332
Autor:
Wilson, Stephen D., Yamani, Z., Dhital, Chetan, Freelon, B., Freeman, P. G., Fernandez-Baca, J. A., Yamada, K., Wakimoto, S., Buyers, W. J. L., Birgeneau, R. J.
Publikováno v:
Phys. Rev. B 85, 014507 (2012)
Spin fluctuations and the local spin susceptibility in isovalently Zn-substituted La$_{2-x}$Sr$_{x}$Cu$_{1-y}$Zn$_y$O$_4$ ($x=0.25$, $y\approx0.01$) are measured via inelastic neutron scattering techniques. As Zn$^{2+}$ is substituted onto the Cu$^{2
Externí odkaz:
http://arxiv.org/abs/1112.0775
High-resolution X-ray scattering studies of the nonpolar thermotropic liquid crystal 4-n-pentylphenylthiol-4'-n-octyloxybenzoate (\bar{8}S5) in aerosil gel nano-networks reveal that the aerosil-induced disorder significantly alters both the nematic t
Externí odkaz:
http://arxiv.org/abs/1104.5670
Autor:
Wilson, Stephen D., Yamani, Z., Rotundu, C. R., Freelon, B., Valdivia, P. N., Bourret-Courchesne, E., Lynn, J. W., Chi, Songxue, Hong, Tao, Birgeneau, R. J.
Magnetic correlations near the magneto-structural phase transition in the bilayer iron pnictide parent compound, BaFe$_2$As$_2$, are measured. In close proximity to the antiferromagnetic phase transition in BaFe$_2$As$_2$, a crossover to three dimens
Externí odkaz:
http://arxiv.org/abs/1009.2116
Autor:
Rotundu, C. R., Freelon, B., Forrest, T. R., Wilson, S. D., Valdivia, P. N., Pinuellas, G., Kim, A., Kim, J. -W., Islam, Z., Bourret-Courchesne, E., Phillips, N. E., Birgeneau, R. J.
Publikováno v:
Physical Review B 82, 144525, 2010
Heat-capacity, X-ray diffraction, and resistivity measurements on a high-quality BaFe$_{2}$As$_{2}$ sample show an evolution of the magneto-structural transition with successive annealing periods. After a 30-day anneal the resistivity in the (ab) pla
Externí odkaz:
http://arxiv.org/abs/1008.2967
Autor:
Wilson, Stephen D., Rotundu, C. R., Yamani, Z., Valdivia, P. N., Freelon, B., Bourret-Courchesne, E., Birgeneau, R. J.
Commonalities among the order parameters of the ubiquitous antiferromagnetism present in the parent compounds of the iron arsenide high temperature superconductors are explored. Additionally, comparison is made between the well established two-dimens
Externí odkaz:
http://arxiv.org/abs/0910.0489
Autor:
Rotundu, C. R., Keane, D. T., Freelon, B., Wilson, S. D., Kim, A., Valdivia, P. N., Bourret-Courchesne, E., Birgeneau, R. J.
The electronic phase diagram of PrFeAsO$_{1-x}$F$_{x}$ (0$\leq$x$\leq$0.225) has been determined using synchrotron X-ray powder diffraction, magnetization and resistivity measurements. The structural transition temperature is suppressed from 154 K to
Externí odkaz:
http://arxiv.org/abs/0907.1308