Phase diagram of pnictide superconductors

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Resistivity at the stuctural and SDW transistions LaOFeAs T S ρ ∝ 1 n 1 , λ Resistivity • Peak at T S enhanced scattering at higher T • Inflection point at T N reduced scattering 5,0x10 -6 Ba(Fe 0.95 Co 0.05 ) 2 As 2 4,0x10 -6 Resistivity in Co doped systems ρ (Ωm) 3,0x10 -6 2,0x10 -6 1,0x10 -6 Single crystal!! • Reduction of scattering at T N smaller • Mean free path limited by disorder due to Co atoms!! 0,0 0 50 100 150 200 250 300 T in K Intrinsic sources of scattering masked by disorder in Co doped single crystals!!!
High Temperature Superconductivity in FeAs Compounds OUTLINE • Introduction • Phase Diagram of LaFeAsO 1-x F x (and other pnictides) Structural, magnetic, and superconducting transitions • Superconducting State Gap, penetration depth, relaxation rate • Normal State Properties Electronic Structure (XAS, PES, ARPES) „Pseudogap“ (NMR, χ) Electronic transport and spin fluctuations Charge inhomogeneity (NQR)
Page 1 and 2:
Phase Diagram of Pnictide Supercond
Page 3 and 4:
Superconductivity in La(O 1-x F x )
Page 5 and 6:
Superconductivity above 50 K La
Page 7 and 8:
Fe pnictides: A class of high T c s
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Cuprates Magnetism and Superconduct
Page 15 and 16: Magnetism and Superconductivity Cup
Page 17 and 18: Some of the people @ IFW involved i
Page 19 and 20: Preparation & Characterization LaO
Page 21 and 22: Resistivity of La(O 1-x F x )FeAs
Page 23 and 24: LaOFeAs: Competing OP above T S ? L
Page 25 and 26: Two phase transitions in (Pr,Sm)OFe
Page 27 and 28: REOFeAs: Structural changes Thermal
Page 29 and 30: SDW magnetism in SrFe 2 As 2 Krelln
Page 31 and 32: Magnetic order of LaOFeAs T= 13 K 5
Page 33 and 34: Magnetic order parameter in undoped
Page 35 and 36: T N LaOFeAs T S S x=0: Stuctural an
Page 37 and 38: T N LaOFeAs T S S x=0: Stuctural an
Page 39 and 40: Resistivity of ReOFeAs Resistivity
Page 41 and 42: Ce magnetization above T N Ce CeOFe
Page 43 and 44: Resistivity of La(O 1-x F x )FeAs
Page 45 and 46: Magnetism of lightly doped La(O 1-x
Page 47 and 48: Doping effect: LaFeAsO 1-x F x Ther
Page 49 and 50: Doping effect: LaFeAsO 1-x F x Ther
Page 51 and 52: Phase diagram of LaFeAsO 1-x F x 20
Page 53 and 54: Phase Diagram of La(O 1-x F x )FeAs
Page 55 and 56: Phase Diagrams of CeFeAsO 1-x F x a
Page 57 and 58: Zero field μSR: : CeO 1-x Fe x As
Page 59 and 60: CeO 1-x F x FeAs: coexistence of ma
Page 61 and 62: Pressure induced Superconductivity
Page 63 and 64: Phase Diagram of Ba 1-x K x Fe 2 As
Page 65: Resistivity of Co doped pnictides 2
Page 69 and 70: How can we measure the superfluid d
Page 71 and 72: Penetration Depth of La(O 1-x F x )
Page 73 and 74: Superconducting Properties of Co do
Page 75 and 76: Superconductivity of Co doped Ba122
Page 77 and 78: Gap on the inner Г-barrel, ГM cut
Page 79 and 80: Penetration Depth of Ba 1-x K x Fe
Page 81 and 82: Gap and Spin Lattice Relaxation Rat
Page 83 and 84: 75 As NMR on La(O 1-x F x )FeAs: T
Page 89 and 90: SC transition in GdFeAsO 0.85 F 0.1
Page 93 and 94: GdFeAsO 0.85 F 0.15 : Specific heat
Page 95 and 96: Electron Spin Resonance of GdO 1-x
Page 97 and 98: GdFeAsO 0.85 F 0.15 : Magnetostrict
Page 101: High Temperature Superconductivity
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Phase diagram of pnictide superconductors

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