245 citations · 422 across the 9 of their papers we have counts for
9 papers
Hole concentration and phonon renormalization in Ca-doped YBa_2Cu_3O_y (6.76 < y < 7.00)
K. C. Hewitt, X. K. Chen, C. Roch +6
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…
Evidence for Two Superconducting Gaps in
X. K. Chen, M. J. Konstantinovic, J. C. Irwin +2
We have measured the Raman spectra of polycrystalline MgB from 25 {\cm} to 1200 {\cm}. When the temperature was decreased below the superconducting transition temperature $T_…
Low-energy excitations in NaV2O5
M. J. Konstantinovic, J. C. Irwin, M. Isobe +1
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 reporte…
Charge-ordering and optical transitions of LiV2O5 and NaV2O5
M. J. Konstantinovic, J. Dong, M. E. Ziaei +5
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 LiV…
The Pseudogap in La(2-x)Sr(x)CuO(4): A Raman Viewpoint
J. G. Naeini, J. C. Irwin, T. Sasagawa +2
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 B…
On the 590cm-1 B1g feature in underdoped Bi2Sr2CaCu2O8+delta
Kevin C. Hewitt, N. L. Wang, J. C. Irwin +3
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. Th…
Doping Dependence of the Pseudogap in La(2-x)Sr(x)CuO(4)
J. G. Naeini, X. K. Chen, J. C. Irwin +3
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 ar…
Evidence for Magnetic Pseudoscaling in Overdoped La(2-x)Sr(x)CuO(4)
J. G. Naeini, X. K. Chen, K. C. Hewitt +5
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,…
Comment on "Superconducting gap anisotropy vs. doping level in high-T_c cuprates" by C. Kendziora et al, PRL 77, 727 (1996)
K. Hewitt, T. Devereaux, X. K. Chen +3
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…