Specific heat and Knight shift of cuprates within the van Hove scenario

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.54.14974· OSTI ID:397599

Sarkar, S; Das, A N ^[1]

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1. Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Calcutta 700 064 (India)

The jump in the specific heat at {ital T}{sub {ital c}}, the specific heat in both the superconducting and normal states, and the Knight shift in the superconducting state are studied within the van Hove singularity scenario considering density of states for a two-dimensional tight-binding system and with an extended saddle-point singularity. The role of the electron-phonon interaction strength, band narrowing, second-nearest-neighbor hopping, and orthorhombic distortion on such properties is investigated. The experimental results on the specific heat and Knight shift of the Y-123 system are compared with the theoretical predictions. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 397599
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 54; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CUPRATES
ELECTRON-PHONON COUPLING
ELECTRONIC STRUCTURE
ENERGY-LEVEL DENSITY
HIGH-TC SUPERCONDUCTORS
KNIGHT SHIFT
SINGULARITY
SPECIFIC HEAT
TEMPERATURE DEPENDENCE