Carrier concentration tuned phase transitions in high tc cuprates and perovskite oxide interfaces

... CARRIER CONCENTRATION- TUNED PHASE TRANSITIONS IN HIGH- Tc CUPRATES AND PEROVSKITE OXIDE INTERFACES SHENGWEI ZENG (M.S., XIAMEN UNIVERSITY, P.R.China) A THESIS SUBMITTED ... Abstract In this thesis, we investigated the modulation of charge carriers and the resultant phase transitions in high- Tc cuprate superconductors and perovskite oxide interface...

Ngày tải lên: 12/09/2015, 09:28

... dealt with the issues of cleaning up and filtering of intraday data (Dacorogna et al., 2001) The specifics of data- filtering and cleaning for HF data from the NSE can be found in Patnaik and Shah ... patterns in volumes and volatility It is observed that returns in the beginning and the end of the trading day tend to be different when compared with data fr...

Ngày tải lên: 24/04/2014, 00:23

... doi:10.1186/1556-276X-6-142 Cite this article as: Antipov et al.: Luminescence of colloidal CdSe/ZnS nanoparticles: high sensitivity to solvent phase transitions Nanoscale Research Letters 2011 6:142 Authors’ ... observed increase of photoluminescence peak energy with pressure for dilute dispersions of CdSe nanocrystals in toluene or 4-ethyl pyridine and attributed thi...

Ngày tải lên: 21/06/2014, 05:20

... superimposing Gaussians centered at 1.45 and 1.76 eV which represent the PA bands of localized and delocalized polarons P2 and DP2, respectively [5, 10] The localized polaron transition P1 and the delocalized ... heterojunctions and the arrow indicates the molecular structure of the PCBM b Energy band diagram of blend materials for bound and mobile...

Ngày tải lên: 22/06/2014, 00:20

... study, the expression of the overexpressed high abundance acute-phase proteins (APPs) in sera of the EOCa patients was analysed according to the stages of the cancer Image analysis Images of the ... not detected in the 2-DE protein profiles of normal control women Unlike the initial three stages of EOCa, the expression of ACT, CLU, HAP, AAT and LRG in sera...

Ngày tải lên: 10/08/2014, 22:20

... PZN -x% PT: single crystal (S) or powder (P) P: 5

Ngày tải lên: 14/09/2015, 08:40

... surface X- ray 44.65o ~43.0-44.0o 42 43 44 45 46 47 2 [010]W [100] L PZN- 4 .5% PT b) b) Fractured surface Intensity (arb units) X- ray X- ray 44. 62 42 43 44 45 o 46 47 2 Figure 5. 1 (0 02) XRD profiles of ... 44.94 ~43 .5- 44.8 42 43 o o 44 45 2 Figure 5. 4 Intensity (arb units) e) PZN- 9%PT Intensity (arb units) 45 2 2 46 47 42 44 .50 o 44.94o 44 .28 o 43 44 45...

Ngày tải lên: 14/09/2015, 08:40

... consisted of highly distorted R phase owing to the soft elastic constants of R The distorted R phases are microscopic in size, of a wide range of lattice parameters and are stressed in intense ... to the poling treatment 5. 4 (a) Summary of main observations The cause for the occurrence of the extremely broad lower 2θ peak adjacent to the main (002)R peak in standard XR...

Ngày tải lên: 14/09/2015, 08:40

... annealing at 600 °C for h and the position shifted further to 2θ ≈ 44 . 05 (Figure 5. 9) 69 as-polished 300oC (1h) ~44 .68 o R Intensity (arb units) 40 0oC (1h) 600oC (5h) ~44 . 05 ~43 .50 41 42 43 ... annealing treatments The heating and cooling rates used were 1 .5 ºC/min Figure 5. 9 shows the (002) XRD profiles of the differently annealed PZN- 4 .5% PT samples and the (...

Ngày tải lên: 14/09/2015, 08:40

... RSM To explain how domain size may affect the (002) diffraction profiles, we begin with diffractions arising from untilted T microdomains By microscale domains, we mean here coarse domains of which ... micro/nanodomains T5 T6 T ω = 0° Figure 6.2 (002) diffraction intensity weighted distributions arising from (a) T microdomains, (b) interference effect of T nanodomains and (c) comb...

Ngày tải lên: 14/09/2015, 08:40

... projection of the coexistence of R micro- and nanotwins onto (002) RSM 112 coexistence of R micro- and nanotwin domains on (002) RSM 7.3 Evidence of rhombohedral micro/nanotwins in PZN- 4 .5% PT at ... domains, a result of the large diffraction width associated with the fine domain structure and the extreme compliant nature of the R phase The diffraction pattern i...

Ngày tải lên: 14/09/2015, 08:40

... and (b) PZN- 7% PT, and (c) and (d) PZN- 8%PT single crystals 1 27 sample of PZN- 7% PT and PZN- 8%PT, respectively, but of the same wafers as in Figures 8.1(a) and (c) These peaks lie in two different ... Ruling out both MB and MC phases being the viable phase, the peak(s) at 2θ ≈ 44-90- 45. 0° must arise from the (100)T domains We may thus conclude that “LT” pha...

Ngày tải lên: 14/09/2015, 08:40

... (b) 85 ºC P/A= 0º P/A= 45 (c) 1 05 ºC P/A= 0º P/A= 45 (d) 1 45 ºC P/A= 0º P/A= 45 (e) 1 65 ºC P/A= 0º P/A= 45 (f) 1 68 ºC C P/A= 45 T C T P/A= 45 [100] 200 µm [010] Figure 8. 11 ZFH domain structures ... of (001)T twin diffractions in as-grown PZN- 6%PT single crystal may be due to the higher residual stress and/ or the presence of a much higher portion of T nanotwin domai...

Ngày tải lên: 14/09/2015, 08:40

... of the depolarization and R-T phase transformation events in poled PZN- PT single crystals PZN- 4 .5% PT and PZN- 7%PT single crystals, of [100]L×[010]W×[001]T in orientation and 6L×2W×0.35T mm3 in ... tilting of the R diffraction out of the ω = 0° plane indicates that both crystals existed in a strained state as the result of poling induced stresses This find...

Ngày tải lên: 14/09/2015, 08:40

... emergence of R-T phase transformation in PZN- PT single crystals, giving TR-T(L) ≅ TDP ≅1 05- 110 °C for PZN- 4 .5% PT and ≅90 -100 °C for PZN- 7%PT These results, including the upper bound values of TR-T, ... (b) 110 ºC, and (c) 1 15 ºC The intensity contours are in log scale T# indicates the vague T diffractions TNT denotes the T at ∆ω ≠ 0º 172 o ε' (x1 0 ) (a) 100 C ε'...

Ngày tải lên: 14/09/2015, 08:40