APS LAX talk for web

Information about APS LAX talk for web

Published on January 9, 2008

Author: Riccard

Source: authorstream.com

Content

Title :  Title Vortex nanoliquid in high-temperature superconductors BSCCO PD 5 phases:  BSCCO PD 5 phases Vortex matter phase diagram in Bi2Sr2CaCu2O8 Point disorder BSCCO PD 3 phases:  BSCCO PD 3 phases B T quasi - ordered - lattice (Bragg glass) Vortex liquid Amorphous Vortex matter phase diagram in Bi2Sr2CaCu2O8 Point disorder Bose glass schematic :  Bose glass schematic Bose glass phase with columnar defects Nelson and Vinokur, PRL 68, 2398 (1992) Vortices pinned by columnar defects Bose glass:  Bose glass Bose glass phase with columnar defects Radzihovsky, PRL 74, 4923 (1995) From BrG to BG:  From BrG to BG Bose glass phase with columnar defects Structure of vortex matter when just few CDs are present? B T Bragg glass Vortex liquid Amorphous B T Vortex liquid Bose glass ? CDs DMO technique:  Differential magneto-optical system He lamp CCD camera Polarizer Cryostat Solenoid Analyzer Microscope DMO technique Movie BSCCO#3 large color:  Movie BSCCO#3 large color Crystal with mask and CDs:  Artificial disorder by heavy ion irradiation Crystal with mask and CDs SST mask Columnar defects by 1 GeV Pb irradiation through perforated mask Movie Satya Bf=20G, B=50G:  Movie Satya Bf=20G, B=50G Upward shift of Bm pristine:  Upward shift of Bm pristine solid liquid pristine melting Upward shift of the melting line with CDs Upward shift of Bm, B 5G:  Upward shift of Bm, B 5G solid liquid solid liquid pristine B=5 G Upward shift of the melting line with CDs Upward shift of Bm, 10G:  Upward shift of Bm, 10G solid liquid 5 G pristine 10 G Upward shift of the melting line with CDs Upward shift of Bm, 20G:  Upward shift of Bm, 20G solid liquid 5 G pristine 20 G 10 G Upward shift of the melting line with CDs Upward shift of Bm, 50G all:  Upward shift of Bm, 50G all Upward shift of the melting line with CDs solid liquid 5 G 20 G B=50 G 10 G pristine Vertical shift of Bm:  Vertical shift of Bm Upward shift of the melting line with CDs vertical shift in Bm Horizontal shift of Tm with CDs :  Horizontal shift of Tm with CDs Upward shift of the melting line with CDs vertical shift in Bm horizontal shift in Tm Crystal w mask and decoration:  Magnetic decoration with CDs Crystal w mask and decoration SST mask Columnar defects by 1 GeV Pb irradiation through perforated mask Crystal with decoration:  Crystal with decoration SST mask Columnar defects by 1 GeV Pb irradiation through perforated mask porous Bragg glass Magnetic decoration B = 40 G Bf = 10 G Magnetic decoration with CDs AFM mica and decoration:  AFM mica and decoration porous Bragg glass Magnetic decoration B = 40 G Bf = 10 G AFM of etched columnar defects in mica Bf = 10 G 20 m Magnetic decoration with CDs Decoration B/Bf=1:  Decoration B/Bf=1 Magnetic decoration BSCCO B = 10 G Bf = 10 G Etched mica Bf = 10 G 20 m B / Bf = 1 Magnetic decoration with CDs Decoration B/Bf=4:  Decoration B/Bf=4 Magnetic decoration BSCCO B = 40 G Bf = 10 G Etched mica Bf = 10 G 20 m B / Bf = 4 Magnetic decoration with CDs Decoration B/Bf=8:  Decoration B/Bf=8 Magnetic decoration BSCCO B = 80 G Bf = 10 G Etched mica Bf = 10 G 20 m B / Bf = 8 Magnetic decoration with CDs Size of crystallites:  Size of crystallites Etched mica Bf = 10 G 20 m number of vortices in the crystallites Magnetic decoration with CDs Bf = 10 G Density of lattice defects:  Density of lattice defects Etched mica Bf = 10 G 20 m density of vortex lattice defects Magnetic decoration with CDs Two distinct vortex populations: soft crystallites and rigid matrix porous Melting line porous:  Melting line porous Melting of porous vortex matter skeleton melting 5 G 20 G 50 G 10 G pristine melting of crystallites delocalization Self-field with CDs small crystal:  Imaging of transport current distribution in irradiated BSCCO Self-field with CDs small crystal Self-field with CDs large crystal:  Self-field with CDs large crystal Imaging of transport current distribution in irradiated BSCCO Bself Jy Pristine melting:  Vortex matter phase diagram in Bi2Sr2CaCu2O8 with CDs Pristine melting Bragg glass liquid Porous melting:  Vortex matter phase diagram in Bi2Sr2CaCu2O8 with CDs Porous melting porous solid liquid ? B = 60 G Nanoliquid PD :  Vortex matter phase diagram in Bi2Sr2CaCu2O8 with CDs Nanoliquid PD porous solid liquid nano- liquid homogeneous Bdl  exp(-T/T0 ) Lopatin and Vinokur, PRL 92 (2004) Kierfeld and Vinokur, PRL 94 (2005) B = 60 G R(T) nanoliquid:  Transport data in Bi2Sr2CaCu2O8 with CDs R(T) nanoliquid homogeneous liquid nonoliquid Transport nanoliquid 1 :  homogeneous liquid Tdl B = 125 G Transport data in Bi2Sr2CaCu2O8 with CDs Transport nanoliquid 1 B = 60 G nonoliquid porous solid Transport nanoliquid 2:  Transport data in Bi2Sr2CaCu2O8 with CDs Transport nanoliquid 2 Tdl B = 125 G B = 60 G homogeneous liquid nonoliquid porous solid Transport nanoliquid 2:  Transport data in Bi2Sr2CaCu2O8 with CDs Transport nanoliquid 2 nonoliquid porous solid Tdl B = 125 G B = 60 G homogeneous liquid enhanced c-axis correlations PD w CDs summary:  Vortex matter phase diagram in Bi2Sr2CaCu2O8 with CDs PD w CDs summary Homogeneous liquid B = 60 G Porous solid Nanoliquid

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