Zobrazeno 1 - 10
of 584
pro vyhledávání: '"Gillett, J."'
Publikováno v:
Phys. Rev. B 92, 155112 (2015)
The twin issues of the nature of the normal state and competing order(s) in the iron arsenides are central to understanding their unconventional, high-Tc superconductivity. We use a combination of transport anisotropy measurements on detwinned Sr(Fe(
Externí odkaz:
http://arxiv.org/abs/1412.1034
Autor:
Zhang, W. -L., Richard, P., Ding, H., Sefat, Athena S., Gillett, J., Sebastian, Suchitra E., Khodas, M., Blumberg, G.
We use polarization-resolved Raman spectroscopy to study the anisotropy of the electronic characteristics of the iron-pnictide parent compounds $A$Fe$_{2}$As$_{2}$ ($A$~=~Eu, Sr). We demonstrate that above the structural phase transition at Ts the dy
Externí odkaz:
http://arxiv.org/abs/1410.6452
Autor:
Arham, H. Z., Hunt, C. R., Gillett, J., Das, S. D., Sebastian, S. E., Chung, D. Y., Kanatzidis, M. G., Greene, L. H.
We use point contact spectroscopy (PCS) to probe the superconducting properties of electron doped $\rm{Ba(Fe_{1-x}Co_x)_2As_2}$ ($\rm{x = 0.05, 0.055, 0.07, 0.08}$) and hole doped $\rm{Ba_{0.8}K_{0.2}Fe_2As_2}$. PCS directly probes the low energy den
Externí odkaz:
http://arxiv.org/abs/1307.1908
Autor:
Arham, H. Z., Hunt, C. R., Park, W. K., Gillett, J., Das, S. D., Sebastian, S. E., Xu, Z. J., Wen, J. S., Lin, Z. W., Li, Q., Gu, G., Thaler, A., Ran, S., Bud'ko, S. L., Canfield, P. C., Chung, D. Y., Kanatzidis, M. G., Greene, L. H.
Publikováno v:
Phys. Rev. B 85, 214515 (2012)
We use point contact spectroscopy to probe $\rm{AEFe_2As_2}$ ($\rm{AE=Ca, Sr, Ba}$) and $\rm{Fe_{1+y}Te}$. For $\rm{AE=Sr, Ba}$ we detect orbital fluctuations above $T_S$ while for AE=Ca these fluctuations start below $T_S$. Co doping preserves the o
Externí odkaz:
http://arxiv.org/abs/1201.2479
Autor:
Arham, H. Z., Hunt, C. R., Park, W. K., Gillett, J., Das, S. D., Sebastian, S. E., Xu, Z. J., Wen, J. S., Lin, Z. W., Li, Q., Gu, G., Thaler, A., Budko, S. L., Canfield, P. C., Greene, L. H.
Publikováno v:
Proceedings: Journal of Physics: Conference Series 400 022001 (2012)
Point contact spectroscopy reveals a gap-like feature above the magnetic and structural transition temperatures for underdoped $Ba(Fe_{1-x}Co_x)_2As_2$, $SrFe_2As_2$ and $Fe_{1+y}Te$. The conductance spectrum starts showing an enhancement at temperat
Externí odkaz:
http://arxiv.org/abs/1108.2749
Autor:
Sutherland, Mike, Hills, D. J., Tan, B. S., Altarawneh, M. M., Harrison, N., Gillett, J., O'Farrell, E. C. T., Benseman, T. M., Kokanovic, I., Syers, P., Cooper, J. R., Sebastian, Suchitra E.
Publikováno v:
Phys. Rev. B. 84, 180586 (2011)
We present a detailed study of quantum oscillations in the antiferromagnetically ordered pnictide compound SrFe$_2$As$_2$ as the angle between the applied magnetic field and crystalline axes is varied. Our measurements were performed on high quality
Externí odkaz:
http://arxiv.org/abs/1107.1704
Autor:
Ewings, R. A., Perring, T. G., Gillett, J., Das, S. D., Sebastian, S. E., Taylor, A. E., Guidi, T., Boothroyd, A. T.
Publikováno v:
Phys. Rev. B. 83, 214519 (2011)
We report inelastic neutron scattering measurements of the magnetic excitations in SrFe2As2, the parent of a family of iron-based superconductors. The data extend throughout the Brillouin zone and up to energies of ~260meV. An analysis with the local
Externí odkaz:
http://arxiv.org/abs/1011.3831
Autor:
Hancock, J. N., Mirzaei, S. I., Gillett, J., Sebastian, S. E., Teyssier, J., Viennois, R., Giannini, E., van der Marel, D.
Publikováno v:
Phys. Rev. B 82, 014523 (2010)
We present a comprehensive comparison of the infrared charge response of two systems, characteristic of classes of the 122 pnictide (SrFe2As2) and 11 chalcogenide (Fe_1.087Te) Fe compounds with magnetically-ordered ground states. In the 122 system, t
Externí odkaz:
http://arxiv.org/abs/1004.0111
SrFe2As2 is the end-member for a series of iron-pnictide superconductors and has a tetragonal-to-orthorhombic phase transition near 200 K. Previous macroscopic measurements to determine the nature of the transition gave seemingly inconsistent results
Externí odkaz:
http://arxiv.org/abs/1002.1639