Zobrazeno 1 - 10
of 95
pro vyhledávání: '"Hunt, C R"'
Autor:
Hunt, C. R., Nicoletti, D., Kaiser, S., Pröpper, D., Loew, T., Porras, J., Keimer, B., Cavalleri, A.
Publikováno v:
Phys. Rev. B 94, 224303 (2016)
Optical excitation of apical oxygen vibrations in YBa$_{2}$Cu$_{3}$O$_{6+\delta}$ has been shown to enhance its c-axis superconducting-phase rigidity, as evidenced by a transient blue shift of the equilibrium inter-bilayer Josephson plasma resonance.
Externí odkaz:
http://arxiv.org/abs/1607.08655
Autor:
Frano, M. Först A., Kaiser, S., Mankowsky, R., Hunt, C. R., Turner, J. J., Dakovski, G. L., Minitti, M. P., Robinson, J., Loew, T., Tacon, M. Le, Keimer, B., Hill, J. P., Cavalleri, A., Dhesi, S. S.
Publikováno v:
Physical Review B, Vol. 90, 184514 (2014)
We use femtosecond resonant soft x-ray diffraction to measure the optically stimulated ultrafast changes of charge density wave correlations in underdoped YBa2Cu3O6.6. We find that when coherent interlayer transport is enhanced by optical excitation
Externí odkaz:
http://arxiv.org/abs/1502.05343
Publikováno v:
Phys. Rev. B 91, 020505(R) (2015)
We address the kinetic competition between charge striped order and superconductivity in La$_{1.675}$Eu$_{0.2}$Sr$_{0.125}$CuO$_{4}$. Ultrafast optical excitation is tuned to a mid-infrared vibrational resonance that destroys charge order and promptl
Externí odkaz:
http://arxiv.org/abs/1502.03028
Autor:
Nicoletti, D., Casandruc, E., Laplace, Y., Khanna, V., Hunt, C. R., Kaiser, S., Dhesi, S. S., Gu, G. D., Hill, J. P., Cavalleri, A.
Publikováno v:
Physical Review B 90, 100503(R) (2014)
We show that superconducting interlayer coupling, which coexists with and is depressed by stripe order in La1.885Ba0.115CuO4, can be enhanced by excitation with near-infrared laser pulses. For temperatures lower than Tc = 13 K, we observe a blue-shif
Externí odkaz:
http://arxiv.org/abs/1404.6796
Autor:
Hu, W., Kaiser, S., Nicoletti, D., Hunt, C. R., Gierz, I., Hoffmann, M. C., Tacon, M. Le, Loew, T., Keimer, B., Cavalleri, A.
Publikováno v:
Nature Materials 13,705(2014)
Nonlinear optical excitation of infrared active lattice vibrations has been shown to melt magnetic or orbital orders and to transform insulators into metals. In cuprates, this technique has been used to remove charge stripes and promote superconducti
Externí odkaz:
http://arxiv.org/abs/1308.3204
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:
Kaiser, S., Hunt, C. R., Nicoletti, D., Hu, W., Gierz, I., Liu, H. Y., Tacon, M. Le, Loew, T., Haug, D., Keimer, B., Cavalleri, A.
Publikováno v:
final version: Phys. Rev. B 89, 184516 (2014)
We report on a photo-induced transient state of YBa2Cu2O6+x in which transport perpendicular to the Cu-O planes becomes highly coherent. This effect is achieved by excitation with mid-infrared optical pulses, tuned to the resonant frequency of apical
Externí odkaz:
http://arxiv.org/abs/1205.4661
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:
Park, W. K., Hunt, C. R., Arham, H. Z., Xu, Z. J., Wen, J. S., Lin, Z. W., Li, Q., Gu, G. D., Greene, L. H.
The superconducting order parameter in the iron-chalcogenide superconductor FeTe$_{0.55}$Se$_{0.45}$ ($T_\textrm{c}$ = 14.2 K) is investigated by point-contact Andreev reflection spectroscopy. The energy gap magnitude (3.8 meV at 1.70 K) and temperat
Externí odkaz:
http://arxiv.org/abs/1005.0190