title vortex nanoliquid in high-temperature superconductors
TRANSCRIPT
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Title
Vortex nanoliquid in high-temperature superconductors
S. S. Banerjee, S. Goldberg, A. Soibel, Y. Myasoedov, M. Rappaport, and E. Zeldov
Weizmann Institute
F. de la Cruz, M. Menghini, and Y. Fasano
Bariloche
M. Konczykowski and C. J . van der Beek Ecole Polytechnique
T. Tamegai Tokyo University
V. M. Vinokur Argonne
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Vortex matter phase diagram in Bi2Sr2CaCu2O8
B
T
Point disorder
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B
T
quasi - ordered -
lattice(Bragg glass)
Vortex liquid
Amorphous
Vortex matter phase diagram in Bi2Sr2CaCu2O8
Point disorder
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liquid
Vortex
lineBose glass
Bose
Hc1(T)
Hc2(T)
HBG(T)
H
T Tc
glass
Bose glass schematic
Bose glass phase with columnar defects
Nelson and Vinokur, PRL 68, 2398 (1992)
Vortices pinned by columnar defects
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liquid
Vortex
lineBose glass
Bose
Hc1(T)
Hc2(T)
HBG(T)
H
T Tc
glass
Bose glass
Bose glass phase with columnar defects
Radzihovsky, PRL 74, 4923 (1995)
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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 liquidAmorphou
s
B
T
Vortex liquid
Bose glass?
CDs
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Ha HaT T
B(r) B(r)
I I
Differential magneto-optical system
Superconductor
F=
Garnet indicator
He
lamp
CCDcamera
Polarizer
Cryostat
Solenoid
Analyzer
Microscope
DMO technique
Ha
B(r)
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Artificial disorder by heavy ion irradiationArtificial disorder by heavy ion irradiation
SST maskSST mask 9090 mm
Columnar defects by 1 GeV Pb Columnar defects by 1 GeV Pb irradiation through perforated maskirradiation through perforated mask
77 nmnm
TEM of columnar defectsTEM of columnar defects
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0
50
100
150
200
50 60 70 80 90
T (K)
B (
G)
solid
liquid
pristine
melting
Upward shift of the melting line with CDs
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0
50
100
150
200
50 60 70 80 90
T (K)
B (
G)
solid
liquid
solid
liquid
pristine
B=5 G
Upward shift of the melting line with CDs
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0
50
100
150
200
50 60 70 80 90
T (K)
B (
G)
solid
liquid
5 G
pristine
10 G
Upward shift of the melting line with CDs
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0
50
100
150
200
50 60 70 80 90
T (K)
B (
G)
solid
liquid
5 G
pristine20 G
10 G
Upward shift of the melting line with CDs
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Upward shift of the melting line with CDs
0
50
100
150
200
50 60 70 80 90
T (K)
B (
G)
solid
liquid
5 G
20 G
B=50 G
10 G
pristine
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0
20
40
60
50 60 70 80 90
B = 50 G
m
m
20 G
10 G5 G
T (K)
B
(G)
Upward shift of the melting line with CDs
vertical shift in Bm
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0
20
40
60
50 60 70 80 90
B = 50 G
m
m
20 G
10 G5 G
T (K)
B
(G)
0
50
100
150
200
0 2 4 6 8 10m
kB
m
B = 50 G
20 G10 G
5 G
T (K)
B (
G)
Upward shift of the melting line with CDs
vertical shift in Bm horizontal shift in Tm
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Magnetic decoration with CDsMagnetic decoration with CDs
SST maskSST mask 9090 mm
Columnar defects by 1 GeV Pb Columnar defects by 1 GeV Pb irradiation through perforated maskirradiation through perforated mask Magnetic decorationMagnetic decoration
BB= 40 G B= 40 G B= 10 G= 10 G
55 mm
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SST maskSST mask 9090 mm
Columnar defects by 1 GeV Pb Columnar defects by 1 GeV Pb irradiation through perforated maskirradiation through perforated mask
porousporous
BraggBragg glassglass
Magnetic decorationMagnetic decoration
BB= 40 G B= 40 G B= 10 G= 10 G
Magnetic decoration with CDsMagnetic decoration with CDs
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porousporous
BraggBragg glassglass
Magnetic decorationMagnetic decoration
BB= 40 G B= 40 G B= 10 G= 10 G
AFM of etchedAFM of etchedcolumnar defects in micacolumnar defects in mica
BB= 10 G= 10 G
20 20 mm
Magnetic decoration with CDsMagnetic decoration with CDs
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Magnetic decoration BSCCOMagnetic decoration BSCCO
BB= 10 G B= 10 G B= 10 G= 10 GEtched mica BEtched mica B= 10 G= 10 G
20 20 mm
BB/ B/ B= 1= 1
Magnetic decoration with CDsMagnetic decoration with CDs
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Magnetic decoration BSCCOMagnetic decoration BSCCO
BB= 40 G B= 40 G B= 10 G= 10 GEtched mica BEtched mica B= 10 G= 10 G
20 20 mm
BB/ B/ B= 4= 4
Magnetic decoration with CDsMagnetic decoration with CDs
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Magnetic decoration BSCCOMagnetic decoration BSCCO
BB= 80 G B= 80 G B= 10 G= 10 GEtched mica BEtched mica B= 10 G= 10 G
20 20 mm
BB/ B/ B= 8= 8
Magnetic decoration with CDsMagnetic decoration with CDs
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Etched mica BEtched mica B= 10 G= 10 G
20 20 mm
number of vortices in the crystallitesnumber of vortices in the crystallites
0 20 40 60 80
0
50
100
150
200
250 N
v in smallest crystallite
Nv in average crystallite
Nv in largest crystallite
Nv
B [G]
Magnetic decoration with CDsMagnetic decoration with CDs
BB= 10 G= 10 G
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Etched mica BEtched mica B= 10 G= 10 G
20 20 mm
density of vortex lattice defectsdensity of vortex lattice defects
Magnetic decoration with CDsMagnetic decoration with CDs
Two distinct vortex populations: soft crystallites and rigid matrixTwo distinct vortex populations: soft crystallites and rigid matrix
amorphous
poro
us
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Melting of porous vortex matter
0
50
100
150
200
50 60 70 80 90
T (K)
B (
G)
skeleton melting
5 G
20 G
50 G
10 G
pristine
melting of
crystallites
delocalization
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Imaging of transport current distribution in irradiated BSCCOImaging of transport current distribution in irradiated BSCCO
50mA, 40G, B50mA, 40G, B== 2020 GG
BBselfself
83.25 K83.25 K
JJyy
83.75 K83.75 K 84.25 K84.25 K-- I I
+ I+ I
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0 50 100 150 200 250 300
0
20
40
60
80
100CDspristineCDs
79.2 K
77.2 K
76.2 K
74.2 K
J y (A
/m)
d (m)
0 50 100 150 200 250 300-0.2
-0.1
0.0
0.1
0.2
0.3
79.2 K
74.2 K
Bse
lf (
G)
d (m)
Self-field with CDs large crystal
Imaging of transport current distribution in irradiated BSCCOImaging of transport current distribution in irradiated BSCCO
BBselfself
JJyy
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Vortex matter phase diagram in Bi2Sr2CaCu2O8 with CDs
50 60 70 80 900
50
100
150
200
0Bm
B (
G)
T (K)
Bragg glass
liquid
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Vortex matter phase diagram in Bi2Sr2CaCu2O8 with CDs
50 60 70 80 900
50
100
150
200
0Bm
CDBm
B (
G)
T (K)
porous solid
liquid ?
B = 60 G
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Vortex matter phase diagram in Bi2Sr2CaCu2O8 with CDs
50 60 70 80 900
50
100
150
200
0Bm
CDBm
B (
G)
T (K)
Bdl
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
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Transport data in Bi2Sr2CaCu2O8 with CDs
60 70 80 90
dlT
B = 60 GR
()
10-2
10-4
10-6
10-8
225
G17
5 G
100
G
50 G75
G
25 G
T (K)
homogeneous liquidnonoliquid
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0.012 0.014 0.016
10-2
10-4
10-6
10-8
R
()
1/T (K-1)
homogeneous liquid
Tdl
TmCD
Tm0B = 125 G
Transport data in Bi2Sr2CaCu2O8 with CDs
50 60 70 80 900
50
100
150
200
0B
m
CDBm
B (
G)
T (K)
Bdl
B = 60 G
nonoliquid
poroussolid
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0.012 0.014 0.016
10-2
10-4
10-6
10-8
R
()
1/T (K-1)
Transport data in Bi2Sr2CaCu2O8 with CDs
Tdl
TmCD
Tm0B = 125 G
B = 60 G
homogeneous liquid
nonoliquid
poroussolid
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0.012 0.014 0.016
10-2
10-4
10-6
10-8
R
()
1/T (K-1)
Transport data in Bi2Sr2CaCu2O8 with CDs
nonoliquid
poroussolid
Tdl
TmCD
Tm0B = 125 G
B = 60 G
homogeneous liquid enhanced c-axis
correlations
Au contactson BSCCO
crystal
+V
-V
-I
+I
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Vortex matter phase diagram in Bi2Sr2CaCu2O8 with CDs
50 60 70 80 900
50
100
150
200
B
(G
)
T (K)
Homogeneousliquid
B = 60 G
Porous solid
Nanoliquid