Nodal gap behavior of Bi2Sr2−xLnxCuO6+δ (Ln = La, Eu) investigated by specific heat measurements

2015 ◽  
Vol 29 (25n26) ◽  
pp. 1542014 ◽  
Author(s):  
M. Shimizu ◽  
Y. Moriya ◽  
S. Baar ◽  
N. Momono ◽  
Y. Amakai ◽  
...  
Keyword(s):  
Low Temperature ◽  
Magnetic Fields ◽  
Fermi Surface ◽  
Specific Heat ◽  
Excitation Spectrum ◽  
Cuprate Superconductors ◽  
Electronic Excitation ◽  
Linear Term ◽  
Electronic Specific Heat ◽  
Low Temperature Specific Heat

We performed low-temperature specific heat measurements on slightly underdoped samples of monolayer cuprate superconductors [Formula: see text] (Ln = La, Eu, Ln-Bi2201) under magnetic fields [Formula: see text]. In La-Bi2201, the coefficient [Formula: see text] of [Formula: see text]-linear term in the electronic specific heat [Formula: see text] at [Formula: see text] shows [Formula: see text] dependence, as expected in [Formula: see text] -wave superconductors. In Eu-Bi2201, [Formula: see text] shows almost the same [Formula: see text] dependence as that of La-Bi2201 below [Formula: see text] T, while [Formula: see text] is suppressed above [Formula: see text] T and deviates downward from the [Formula: see text] curve of La-Bi2201. This result suggests the the gap and the electronic excitation spectrum near nodes are modified in Eu-Bi2201 except the region of the Fermi surface in the immediate vicinity of nodes.

Low-temperature specific heat ofBaCuO2andBaCuO2.14in magnetic fields to 7 T

2000 ◽  
Vol 61 (1) ◽  
pp. 538-548 ◽  
Author(s):  
R. A. Fisher ◽  
D. A. Wright ◽  
J. P. Emerson ◽  
B. F. Woodfield ◽  
N. E. Phillips ◽  
...  
Keyword(s):  
Low Temperature ◽  
Magnetic Fields ◽  
Specific Heat ◽  
Low Temperature Specific Heat

Low-temperature specific heat of antiferromagneticEuNi5P3and mixed-valentEuNi2P2in magnetic fields to 7 T

1995 ◽  
Vol 52 (18) ◽  
pp. 13519-13525 ◽  
Author(s):  
R. A. Fisher ◽  
P. Radhakrishna ◽  
N. E. Phillips ◽  
J. V. Badding ◽  
A. M. Stacy
Keyword(s):  
Low Temperature ◽  
Magnetic Fields ◽  
Specific Heat ◽  
Low Temperature Specific Heat

Low-temperature specific heat of the 123, 124 and 247 phases of Y-Ba-Cu-O in magnetic fields up to 14 Tesla

1992 ◽  
Vol 200 (1-2) ◽  
pp. 1-11 ◽  
Author(s):  
D. Sanchez ◽  
A. Junod ◽  
J.-Y. Genoud ◽  
T. Graf ◽  
J. Muller
Keyword(s):  
Low Temperature ◽  
Magnetic Fields ◽  
Specific Heat ◽  
Low Temperature Specific Heat

LOW-TEMPERATURE SPECIFIC HEAT OF YMn2 IN THE PARAMAGNETIC AND ANTIFERROMAGNETIC PHASES

1993 ◽  
Vol 07 (01n03) ◽  
pp. 830-833 ◽  
Author(s):  
R.A. FISHER ◽  
R. BALLOU ◽  
J.P. EMERSON ◽  
E. LELIEVRE-BERNA ◽  
N.E. PHILLIPS
Keyword(s):  
Low Temperature ◽  
Specific Heat ◽  
Applied Pressure ◽  
Paramagnetic State ◽  
Linear Term ◽  
Spin Fluctuations ◽  
Spin Frustration ◽  
Magnetic Instability ◽  
Low Temperature Specific Heat

The low-temperature specific heat of YMn2 has been measured at applied pressures of 0 to 7.7 kbar. A paramagnetic state is stabilized for moderate values of the applied pressure (of the order of 1.6 kbar). A large linear term in the specific heat, which decreases regularly with increasing pressure, is observed in this phase. It is ascribed to giant spin fluctuations associated with a magnetic-non magnetic instability and a strong geometrical spin frustration.

LOW TEMPERATURE SPECIFIC HEAT OF YBa2Cu3O7

1993 ◽  
Vol 07 (01n03) ◽  
pp. 166-169 ◽  
Author(s):  
R. CASPARY ◽  
P. HELLMANN ◽  
T. WOLF ◽  
F. STEGLICH
Keyword(s):  
Low Temperature ◽  
Magnetic Fields ◽  
Specific Heat ◽  
Spin Glass ◽  
Oxygen Content ◽  
Theoretical Models ◽  
Specific Heat Data ◽  
Field Dependent ◽  
Low Temperature Specific Heat ◽  
Heat Data

We show specific heat data in magnetic fields to B = 8T on new polycrystals with different oxygen content and compare them with earlier results. The analysis reveals a field dependent residual linear term which is discussed within theoretical models of Bulaevskii and for a spin-glass.

Low temperature specific heat of REBa2Cu3O7 in magnetic fields up to 5 T (re = heavy rare earth)

1988 ◽  
Vol 153-155 ◽  
pp. 1018-1019 ◽  
Author(s):  
H.P. van der Meulen ◽  
J.J.M. Franse ◽  
Z. Tarnawski ◽  
K. Kadowaki ◽  
J.C.P. Klaasse ◽  
...  
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Magnetic Fields ◽  
Specific Heat ◽  
Heavy Rare Earth ◽  
Low Temperature Specific Heat
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