Zobrazeno 1 - 10
of 126
pro vyhledávání: '"Irwin, J. C."'
Autor:
Hewitt, K. C., Chen, X. K., Roch, C., Chrzanowski, J., Irwin, J. C., Altendorf, E. H., Liang, R., Bonn, D., Hardy, W. N.
Publikováno v:
Phys. Rev. B 69, 064514 (2004)
In order to access the overdoped regime of the YBa_2Cu_3O_y phase diagram, 2% Ca is substituted for Y in YBa_2Cu_3O_y (y = 7.00,6.93,6.88,6.76). Raman scattering studies have been carried out on these four single crystals. Measurements of the superco
Externí odkaz:
http://arxiv.org/abs/cond-mat/0211125
Publikováno v:
Phys. Rev. Lett. 87, 157002, (2001)
We have measured the Raman spectra of polycrystalline MgB$_{2}$ from 25 {\cm} to 1200 {\cm}. When the temperature was decreased below the superconducting transition temperature $T_c$, we observed a superconductivity-induced redistribution in the elec
Externí odkaz:
http://arxiv.org/abs/cond-mat/0104005
Publikováno v:
Phys.Rev.B 65, 12404 (2002).
In the (ab) polarized Raman scattering spectra of NaV2O5 single crystals, measured with 647.1 nm laser line at T < Tc, we found two modes at 86, and 126 cm-1 not previously reported. These two modes, together with 66, and 106 cm-1 modes, make an arra
Externí odkaz:
http://arxiv.org/abs/cond-mat/0103453
Autor:
Hewitt, K. C., Irwin, J. C.
Publikováno v:
Phys. Rev. B 66, 054516 (2002)
Bi2Sr2CaCu2O{8 + \delta} crystals with varying hole concentrations (0.12 < p < 0.23) were studied to investigate the effects of doping on the symmetry and magnitude of the superconducting gap. Electronic Raman scattering experiments that sample regio
Externí odkaz:
http://arxiv.org/abs/cond-mat/0012413
Autor:
Konstantinovic, M. J., Dong, J., Ziaei, M. E., Clayman, B. P., Irwin, J. C., Yakushi, K., Isobe, M., Ueda, Y.
Publikováno v:
PRB 63, 121102 (2001)
We present the measurements of the polarized optical spectra of NaV2O5 and LiV2O5. In an energy range from 0.5 to 5.5 eV we observe similar peaks in the E parallel a spectra of LiV2O5 and NaV2O5, which suggests similar electronic structure along the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0010327
We report the results of Raman scattering experiments on single crystals of La(2-x)Sr(x)CuO(4) [La214] as a function of temperature and doping. In underdoped compounds low-energy B1g spectral weight is depleted in association with the opening of a ps
Externí odkaz:
http://arxiv.org/abs/cond-mat/9909342
Publikováno v:
Phys. Rev. B 60 (1999) R9943
Raman scattering studies have been performed on underdoped Bi2Sr2CaCu2O8+delta. In single crystals underdoped by oxygen removal, a 590 cm-1 peak is observed in the B1g spectrum. The feature is observed to soften in frequency by 3.8% with isotopic exc
Externí odkaz:
http://arxiv.org/abs/cond-mat/9904002
Publikováno v:
Phys. Rev. B 59, 1 April 1999
We report the results of Raman scattering experiments on single crystals of La(2-x)Sr(x)CuO(4) that span the range from underdoped (x = 0.10) to overdoped (x =0.22). The spectra are consistent with the existence of a strong anisotropic quasiparticle
Externí odkaz:
http://arxiv.org/abs/cond-mat/9804262
Autor:
Naeini, J. G., Chen, X. K., Hewitt, K. C., Irwin, J. C., Devereaux, T. P., Okuya, M., Kimura, T., Kishio, K.
Publikováno v:
Phys. Rev. B 57, R11077 (1998)
We report the results of electronic Raman scattering experiments on an overdoped La(1.78)Sr(0.22)CuO(4) single crystal as a function of temperature. The scattering rate Gamma(w->0,T) has been determined from the normal state B(1g) spectra in the rang
Externí odkaz:
http://arxiv.org/abs/cond-mat/9711272
Publikováno v:
Phys. Rev. Lett. 78 (1997) 4891
In a recent paper Kendziora et al concluded that the superconducting gap in overdoped Bi-2212 is isotropic. From data obtained from electronic Raman scattering measurements, their conclusion was based on the observation that pair breaking peaks occur
Externí odkaz:
http://arxiv.org/abs/cond-mat/9701173