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Materials 286K Class 13, Local structure and structural effects in cuprates Right: (La,M) 2 CuO 4 superconducting T c : Composition.

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Presentation on theme: "Materials 286K Class 13, Local structure and structural effects in cuprates Right: (La,M) 2 CuO 4 superconducting T c : Composition."— Presentation transcript:

1 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in cuprates Right: (La,M) 2 CuO 4 superconducting T c : Composition dependence at 10 K of (a) the in-plane copper-oxygen, Cu-O(1), bond lengths; (b) the orthorhombic strain; (c) the Cu-O(1)-Cu bond angles; (d ) the superconducting T c ’s for La 2–x Sr x CuO 4 and La 2–x Ca x CuO 4 systems. Tetragonal La 2–x Sr x CuO 4 systems under applied pressure are marked by solid squares. Dabrowski, Wang, Rogacki, Jorgensen, Hitterman, Wagner, Hunter, Radaelli, Hinks, Phys. Rev. Lett. 76 (1996) 1348–1351.

2 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in cuprates Cu–O bond distances in La 1.85 Sr 0.15 CuO 4 appear to suggest two phases at low temperature, associated with stripes. Bianconi, Saini, Lanzara, Missori, Rossetti, Moro, Oyanagi, Yamaguchi, Oka, Ito, Phys. Rev. Lett. 76 (1996) 3412–3415.

3 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in cuprates MBE-grown LSCO: Highest T C recorded, potentially due to interface effects. Bozovic, Logvenov, Belca, Narimbetov, Sveklo, Phys. Rev. Lett. 89 (2002) 107001(1–4).

4 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in cuprates Average compositions versus bilayers: T c is enhanced Yuli, Asulin, Millo, Orgad, Iomin, Koren, Phys. Rev. Lett. 101 (2008) 057005(1–4).

5 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in cuprates Highly optimized “123”. T c reaches 94.3 K. Liang, Bonn, Hardy, Phys. Rev. B. 73 (2006) 180505R(1–4).

6 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in cuprates Highly optimized “123”. T c reaches 94.3 K. T c is slightly suppressed near p = 1/8 holes. Stripe formation? Liang, Bonn, Hardy, Phys. Rev. B. 73 (2006) 180505R(1–4).

7 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in cuprates McAllister, Attfield, Phys. Rev. Lett. 83 (1999) 3289–3292. Cation disorder in 214 cuprates: All doped at x = 0.15

8 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in cuprates Cation disorder in 214 cuprates: All doped at x = 0.15 McAllister, Attfield, Phys. Rev. Lett. 83 (1999) 3289–3292.

9 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in cobaltates Polarons in La 1–x Sr x CoO 3 (x = 0.3): Behavior attributed to phase separation. Caciuffo, Mira, Rivas, Senaris-Rodrguez, Radaelli, Carsughi, Fiorani, Goodenough, Europhys. Lett. 45 (1999) 399–405.

10 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in cobaltates Polarons in La 1–x Sr x CoO 3 (x = 0.3): Magnetic clusters seen in small-angle scattering grow and then shrink. Caciuffo, Mira, Rivas, Senaris-Rodrguez, Radaelli, Carsughi, Fiorani, Goodenough, Europhys. Lett. 45 (1999) 399–405.

11 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in manganites Pr 0.7 Ca 0.3 MnO 3 : Radaelli, Ibberson, Argyriou, Casalta, Andersen, Cheong, Mitchell, Phys. Rev. B 63 (2001) 172419(1–4).

12 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in manganites Pr 0.7 Ca 0.3 MnO 3 : Radaelli, Ibberson, Argyriou, Casalta, Andersen, Cheong, Mitchell, Phys. Rev. B 63 (2001) 172419(1–4).

13 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in manganites La 1–x Ca x MnO 3 : PDF peak corresponding to O–O correlations. (a) x = 0.25, (b) x = 0.21, and (c) x = 0.12. Billinge, DiFrancesco, Kwei, Neumeier, Thompson, Phys. Rev. Lett 77 (1996) 715–718.

14 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in manganites La 1–x Ca x MnO 3 in the ferromagnetic regime Bozin, Schmidt, DeConinck, Paglia, Mitchell, Chatterji, Radaelli, Proffen, Billinge, Phys. Rev. Lett. 98 (2007) 137203(1–4).

15 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in manganites La 1–x Ca x MnO 3 in the ferromagnetic regime Bozin, Schmidt, DeConinck, Paglia, Mitchell, Chatterji, Radaelli, Proffen, Billinge, Phys. Rev. Lett. 98 (2007) 137203(1–4).

16 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in thiospinels CuIr 2 S 4 : M–I transition at 230 K. Radaelli, Horibe, Gutmann, Ishibashi, Chen, Ibberson, Koyama, Hor, Kiryukhin, Cheong, Nature 416 (2002) 155–158.

17 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in thiospinels CuIr 2 S 4 : M–I transition at 230 K. Temperature, Cr 3+ doping, and X-ray fluence effects. Bozin, Masadeh, Hor, Mitchell, Billinge, Phys. Rev. Lett. 106 (2011) 045501(1–4).

18 Materials 286K seshadri@mrl.ucsb.edu Class 13, Local structure and structural effects in thiospinels CuIr 2 S 4 : M–I transition at 230 K. Temperature, Cr 3+ doping, and X-ray fluence effects. Bozin, Masadeh, Hor, Mitchell, Billinge, Phys. Rev. Lett. 106 (2011) 045501(1–4).


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