Low-temperature specific heat of La1.85Sr0.15CuO4 and La2CuO4

Y. P. Feng; A. Jin; D. Finotello; K. A. Gillis; M. H.W. Chan; J. E. Greedan

doi:10.1103/PhysRevB.38.7041

Low-temperature specific heat of La1.85Sr0.15CuO4 and La2CuO4

Y. P. Feng, A. Jin, D. Finotello, K. A. Gillis, M. H.W. Chan, J. E. Greedan

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Abstract

The specific heat of polycrystalline samples of the high-Tc superconductor La1.85Sr0.15CuO4 and the undoped insulator La2CuO4 have been measured from 80 mK to 4 K and from 7 to 55 K. The low-temperature limit of the specific heat of La1.85Sr0.15CuO4 can be well accounted for by a sizable linear T term (T) in addition to the Debye-like term (BT3) with =1.8±0.2 mJ/K2 mol. A contribution due to possible magnetic impurities is also present. In contrast, the coefficient of the linear T term in La2CuO4 is found to be 0.2±0.2 mJ/K2 mol. The large linear T term in the superconducting sample suggests the presence of the Fermi-liquid-type excitations at low temperatures.

Original language	English (US)
Pages (from-to)	7041-7044
Number of pages	4
Journal	Physical Review B
Volume	38
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.38.7041
State	Published - 1988

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1103/PhysRevB.38.7041

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title = "Low-temperature specific heat of La1.85Sr0.15CuO4 and La2CuO4",

abstract = "The specific heat of polycrystalline samples of the high-Tc superconductor La1.85Sr0.15CuO4 and the undoped insulator La2CuO4 have been measured from 80 mK to 4 K and from 7 to 55 K. The low-temperature limit of the specific heat of La1.85Sr0.15CuO4 can be well accounted for by a sizable linear T term (T) in addition to the Debye-like term (BT3) with =1.8±0.2 mJ/K2 mol. A contribution due to possible magnetic impurities is also present. In contrast, the coefficient of the linear T term in La2CuO4 is found to be 0.2±0.2 mJ/K2 mol. The large linear T term in the superconducting sample suggests the presence of the Fermi-liquid-type excitations at low temperatures.",

author = "Feng, {Y. P.} and A. Jin and D. Finotello and Gillis, {K. A.} and Chan, {M. H.W.} and Greedan, {J. E.}",

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T1 - Low-temperature specific heat of La1.85Sr0.15CuO4 and La2CuO4

AU - Feng, Y. P.

AU - Jin, A.

AU - Finotello, D.

AU - Gillis, K. A.

AU - Chan, M. H.W.

AU - Greedan, J. E.

PY - 1988

Y1 - 1988

N2 - The specific heat of polycrystalline samples of the high-Tc superconductor La1.85Sr0.15CuO4 and the undoped insulator La2CuO4 have been measured from 80 mK to 4 K and from 7 to 55 K. The low-temperature limit of the specific heat of La1.85Sr0.15CuO4 can be well accounted for by a sizable linear T term (T) in addition to the Debye-like term (BT3) with =1.8±0.2 mJ/K2 mol. A contribution due to possible magnetic impurities is also present. In contrast, the coefficient of the linear T term in La2CuO4 is found to be 0.2±0.2 mJ/K2 mol. The large linear T term in the superconducting sample suggests the presence of the Fermi-liquid-type excitations at low temperatures.

AB - The specific heat of polycrystalline samples of the high-Tc superconductor La1.85Sr0.15CuO4 and the undoped insulator La2CuO4 have been measured from 80 mK to 4 K and from 7 to 55 K. The low-temperature limit of the specific heat of La1.85Sr0.15CuO4 can be well accounted for by a sizable linear T term (T) in addition to the Debye-like term (BT3) with =1.8±0.2 mJ/K2 mol. A contribution due to possible magnetic impurities is also present. In contrast, the coefficient of the linear T term in La2CuO4 is found to be 0.2±0.2 mJ/K2 mol. The large linear T term in the superconducting sample suggests the presence of the Fermi-liquid-type excitations at low temperatures.

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JO - Physical Review B

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Low-temperature specific heat of La1.85Sr0.15CuO4 and La2CuO4

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