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Title: Evidence of unusual hybridization: Electrical resistivity and specific heat of Y{sub 1{minus}{ital x}}Tb{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7} single crystals

Abstract

The electrical resistivity {rho}({ital T},{ital x}) (4{le}{ital T}{le}300 K) and specific heat {ital C}({ital T},{ital x}) (0.3{le}{ital T}{le}15 K) have been measured on single crystals of Y{sub 1{minus}{ital x}}Tb{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7}. $T sub c--- is 91 K and irrespective of Tb doping. However, the {ital T}-linear slope of {rho}({ital T},{ital x}) for {ital T}{gt}{ital T}{sub {ital c}} increases rapidly with increasing {ital x}, and a fit of {rho}({ital T},{ital x}) to {ital A}+{ital BT} indicates that the Tb doping primarily alters the slope and much more weakly impacts on the {ital T}{r_arrow}0 intercept. The results of the low-temperature {ital C}({ital T},{ital x}), on the other hand, show an anomalously enhanced electron contribution to {ital C}({ital T}), {gamma}. The enhancement of {gamma}, along with a large temperature-independent magnetic susceptibility {chi}{sub 0} reported earlier, strongly suggests the appearance of strong {ital f} conduction-electron hybridization. It becomes apparent that the Tb-doped system possesses properties that largely deviate from the well-known behavior of the other high-{ital T}{sub {ital c}} and doped high-{ital T}{sub {ital c}} systems, thus standing out as being anomalous.

Authors:
; ; ; ; ;  [1];  [2]
  1. National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306-4005 (United States)
  2. Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)
Publication Date:
OSTI Identifier:
76411
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 52; Journal Issue: 1; Other Information: PBD: 1 Jul 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; YTTRIUM OXIDES; ELECTRONIC STRUCTURE; TERBIUM OXIDES; BARIUM OXIDES; COPPER OXIDES; MONOCRYSTALS; HIGH-TC SUPERCONDUCTORS; HYBRIDIZATION; ELECTRIC CONDUCTIVITY; SPECIFIC HEAT; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K

Citation Formats

Cao, G, McCall, S, Freibert, F, Shepard, M, Henning, P, Crow, J E, and Andraka, B. Evidence of unusual hybridization: Electrical resistivity and specific heat of Y{sub 1{minus}{ital x}}Tb{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7} single crystals. United States: N. p., 1995. Web. doi:10.1103/PhysRevB.52.71.
Cao, G, McCall, S, Freibert, F, Shepard, M, Henning, P, Crow, J E, & Andraka, B. Evidence of unusual hybridization: Electrical resistivity and specific heat of Y{sub 1{minus}{ital x}}Tb{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7} single crystals. United States. https://doi.org/10.1103/PhysRevB.52.71
Cao, G, McCall, S, Freibert, F, Shepard, M, Henning, P, Crow, J E, and Andraka, B. 1995. "Evidence of unusual hybridization: Electrical resistivity and specific heat of Y{sub 1{minus}{ital x}}Tb{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7} single crystals". United States. https://doi.org/10.1103/PhysRevB.52.71.
@article{osti_76411,
title = {Evidence of unusual hybridization: Electrical resistivity and specific heat of Y{sub 1{minus}{ital x}}Tb{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7} single crystals},
author = {Cao, G and McCall, S and Freibert, F and Shepard, M and Henning, P and Crow, J E and Andraka, B},
abstractNote = {The electrical resistivity {rho}({ital T},{ital x}) (4{le}{ital T}{le}300 K) and specific heat {ital C}({ital T},{ital x}) (0.3{le}{ital T}{le}15 K) have been measured on single crystals of Y{sub 1{minus}{ital x}}Tb{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7}. $T sub c--- is 91 K and irrespective of Tb doping. However, the {ital T}-linear slope of {rho}({ital T},{ital x}) for {ital T}{gt}{ital T}{sub {ital c}} increases rapidly with increasing {ital x}, and a fit of {rho}({ital T},{ital x}) to {ital A}+{ital BT} indicates that the Tb doping primarily alters the slope and much more weakly impacts on the {ital T}{r_arrow}0 intercept. The results of the low-temperature {ital C}({ital T},{ital x}), on the other hand, show an anomalously enhanced electron contribution to {ital C}({ital T}), {gamma}. The enhancement of {gamma}, along with a large temperature-independent magnetic susceptibility {chi}{sub 0} reported earlier, strongly suggests the appearance of strong {ital f} conduction-electron hybridization. It becomes apparent that the Tb-doped system possesses properties that largely deviate from the well-known behavior of the other high-{ital T}{sub {ital c}} and doped high-{ital T}{sub {ital c}} systems, thus standing out as being anomalous.},
doi = {10.1103/PhysRevB.52.71},
url = {https://www.osti.gov/biblio/76411}, journal = {Physical Review, B: Condensed Matter},
number = 1,
volume = 52,
place = {United States},
year = {1995},
month = {7}
}