Superconductivity and magnetism in ladder and chain compounds physics of (Sr,Ca)14Cu041O41

M. Uehara, N. Motoyama, M. Matsuda, H. Eisaki, Jun Akimitsu

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The study of ladder materials has in recent years become one of the central issues in the field of condensed matter physics. Ladder materials, which contain a structural unit composed of coupled arrays of one-dimensional (1D) chains, are considered to be an interesting intermediate step between one- and two-dimensional (2D) systems [1-5]. In fact, it is now recognized that the crossover from 1D to 2D is far from straightforward and that ladder materials by themselves exhibit a variety of new physics. Historically, studies on ladder material were motivated by the discovery of hightransition- temperature (high-Tc) superconductors occurring in 2D spin-1/2 (S=1/2) Heisenberg antiferromagnets [6]. Two theoretical predictions have particularly triggered extensive research [1,2]. First, ladders made from an even number of spin-1/2 Heisenberg chains (even-leg ladders) are expected to have a unique spin-liquid ground state with short range spin correlation, where there exists a finite energy gap ("spin gap") to the lowest excited state. The spin gap, more frequently called the pseudogap, is a key feature of high-Tc superconductors, particularly in the low carrier concentration region. Ladder materials are in this context considered to be good references to gain insights into the pseudogap physics of high-Tc superconductors. Second, and a more intriguing hypothesis, is the possible occurrence of superconductivity in even-leg ladders when they are doped with holes, similar to the high-Tc materials in which holes are doped into 2D copper-oxygen (CuO2) planes. The symmetry of pairing is predicted to be d-wave like [7], adding to the similarities between doped ladders and doped 2D planes. Stimulated by these theoretical suggestions, intensive experimental studies have been carried out, with a variety of cuprate ladder materials having been newly discovered. For instance, (i) the existence of a spin gap was confirmed for SrCu 2O3, a prototype of a twoladder compound [8,9], (ii) hole-doping into two-legged ladders was first achieved on LaCuO2.5 by replacing La with Sr [10], and (iii) superconductivity at 12.5 K was observed in Sr14-xCaxCu24O41 under a pressure of 3 GPa [11]. Here, we review experimental results on cuprate spin ladder materials, emphasizing those for Sr14-xCaxCu 24O41. In Sec. 1.2, brief theoretical background is provided, while Sec. 1.3 introduces typical cuprate spin ladder materials. In Chap. 2, we review the magnetic properties of hole-doped edge-sharing S=1/2 chains, a constituent of (Sr,Ca)14Cu24O41, after which the normal state properties of (Sr,Ca)14Cu24O41 are considered in Chap. 3, with emphasis on the effect of Ca substitution on charge dynamics of hole-doped two-leg ladders. Superconducting properties are then discussed in Chap. 4, being followed by Chap. 5 which discusses the consistency between theory and experiments of ladder and summarizes novel physical insights obtained by a series of experiments on (Sr,Ca)14Cu24O 41. Readers should note that our review is in addition to other excellent reviews on spin ladder system [3-5].

Original languageEnglish
Title of host publicationFrontiers in Magnetic Materials
PublisherSpringer Berlin Heidelberg
Pages573-609
Number of pages37
ISBN (Print)354024512X, 9783540245124
DOIs
Publication statusPublished - 2005
Externally publishedYes

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ladders
superconductivity
physics
cuprates
condensed matter physics
readers
high temperature superconductors
suggestion
crossovers

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Uehara, M., Motoyama, N., Matsuda, M., Eisaki, H., & Akimitsu, J. (2005). Superconductivity and magnetism in ladder and chain compounds physics of (Sr,Ca)14Cu041O41 . In Frontiers in Magnetic Materials (pp. 573-609). Springer Berlin Heidelberg. https://doi.org/10.1007/3-540-27284-4_19

Superconductivity and magnetism in ladder and chain compounds physics of (Sr,Ca)14Cu041O41 . / Uehara, M.; Motoyama, N.; Matsuda, M.; Eisaki, H.; Akimitsu, Jun.

Frontiers in Magnetic Materials. Springer Berlin Heidelberg, 2005. p. 573-609.

Research output: Chapter in Book/Report/Conference proceedingChapter

Uehara, M, Motoyama, N, Matsuda, M, Eisaki, H & Akimitsu, J 2005, Superconductivity and magnetism in ladder and chain compounds physics of (Sr,Ca)14Cu041O41 . in Frontiers in Magnetic Materials. Springer Berlin Heidelberg, pp. 573-609. https://doi.org/10.1007/3-540-27284-4_19
Uehara M, Motoyama N, Matsuda M, Eisaki H, Akimitsu J. Superconductivity and magnetism in ladder and chain compounds physics of (Sr,Ca)14Cu041O41 . In Frontiers in Magnetic Materials. Springer Berlin Heidelberg. 2005. p. 573-609 https://doi.org/10.1007/3-540-27284-4_19
Uehara, M. ; Motoyama, N. ; Matsuda, M. ; Eisaki, H. ; Akimitsu, Jun. / Superconductivity and magnetism in ladder and chain compounds physics of (Sr,Ca)14Cu041O41 . Frontiers in Magnetic Materials. Springer Berlin Heidelberg, 2005. pp. 573-609
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abstract = "The study of ladder materials has in recent years become one of the central issues in the field of condensed matter physics. Ladder materials, which contain a structural unit composed of coupled arrays of one-dimensional (1D) chains, are considered to be an interesting intermediate step between one- and two-dimensional (2D) systems [1-5]. In fact, it is now recognized that the crossover from 1D to 2D is far from straightforward and that ladder materials by themselves exhibit a variety of new physics. Historically, studies on ladder material were motivated by the discovery of hightransition- temperature (high-Tc) superconductors occurring in 2D spin-1/2 (S=1/2) Heisenberg antiferromagnets [6]. Two theoretical predictions have particularly triggered extensive research [1,2]. First, ladders made from an even number of spin-1/2 Heisenberg chains (even-leg ladders) are expected to have a unique spin-liquid ground state with short range spin correlation, where there exists a finite energy gap ({"}spin gap{"}) to the lowest excited state. The spin gap, more frequently called the pseudogap, is a key feature of high-Tc superconductors, particularly in the low carrier concentration region. Ladder materials are in this context considered to be good references to gain insights into the pseudogap physics of high-Tc superconductors. Second, and a more intriguing hypothesis, is the possible occurrence of superconductivity in even-leg ladders when they are doped with holes, similar to the high-Tc materials in which holes are doped into 2D copper-oxygen (CuO2) planes. The symmetry of pairing is predicted to be d-wave like [7], adding to the similarities between doped ladders and doped 2D planes. Stimulated by these theoretical suggestions, intensive experimental studies have been carried out, with a variety of cuprate ladder materials having been newly discovered. For instance, (i) the existence of a spin gap was confirmed for SrCu 2O3, a prototype of a twoladder compound [8,9], (ii) hole-doping into two-legged ladders was first achieved on LaCuO2.5 by replacing La with Sr [10], and (iii) superconductivity at 12.5 K was observed in Sr14-xCaxCu24O41 under a pressure of 3 GPa [11]. Here, we review experimental results on cuprate spin ladder materials, emphasizing those for Sr14-xCaxCu 24O41. In Sec. 1.2, brief theoretical background is provided, while Sec. 1.3 introduces typical cuprate spin ladder materials. In Chap. 2, we review the magnetic properties of hole-doped edge-sharing S=1/2 chains, a constituent of (Sr,Ca)14Cu24O41, after which the normal state properties of (Sr,Ca)14Cu24O41 are considered in Chap. 3, with emphasis on the effect of Ca substitution on charge dynamics of hole-doped two-leg ladders. Superconducting properties are then discussed in Chap. 4, being followed by Chap. 5 which discusses the consistency between theory and experiments of ladder and summarizes novel physical insights obtained by a series of experiments on (Sr,Ca)14Cu24O 41. Readers should note that our review is in addition to other excellent reviews on spin ladder system [3-5].",
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T1 - Superconductivity and magnetism in ladder and chain compounds physics of (Sr,Ca)14Cu041O41

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N2 - The study of ladder materials has in recent years become one of the central issues in the field of condensed matter physics. Ladder materials, which contain a structural unit composed of coupled arrays of one-dimensional (1D) chains, are considered to be an interesting intermediate step between one- and two-dimensional (2D) systems [1-5]. In fact, it is now recognized that the crossover from 1D to 2D is far from straightforward and that ladder materials by themselves exhibit a variety of new physics. Historically, studies on ladder material were motivated by the discovery of hightransition- temperature (high-Tc) superconductors occurring in 2D spin-1/2 (S=1/2) Heisenberg antiferromagnets [6]. Two theoretical predictions have particularly triggered extensive research [1,2]. First, ladders made from an even number of spin-1/2 Heisenberg chains (even-leg ladders) are expected to have a unique spin-liquid ground state with short range spin correlation, where there exists a finite energy gap ("spin gap") to the lowest excited state. The spin gap, more frequently called the pseudogap, is a key feature of high-Tc superconductors, particularly in the low carrier concentration region. Ladder materials are in this context considered to be good references to gain insights into the pseudogap physics of high-Tc superconductors. Second, and a more intriguing hypothesis, is the possible occurrence of superconductivity in even-leg ladders when they are doped with holes, similar to the high-Tc materials in which holes are doped into 2D copper-oxygen (CuO2) planes. The symmetry of pairing is predicted to be d-wave like [7], adding to the similarities between doped ladders and doped 2D planes. Stimulated by these theoretical suggestions, intensive experimental studies have been carried out, with a variety of cuprate ladder materials having been newly discovered. For instance, (i) the existence of a spin gap was confirmed for SrCu 2O3, a prototype of a twoladder compound [8,9], (ii) hole-doping into two-legged ladders was first achieved on LaCuO2.5 by replacing La with Sr [10], and (iii) superconductivity at 12.5 K was observed in Sr14-xCaxCu24O41 under a pressure of 3 GPa [11]. Here, we review experimental results on cuprate spin ladder materials, emphasizing those for Sr14-xCaxCu 24O41. In Sec. 1.2, brief theoretical background is provided, while Sec. 1.3 introduces typical cuprate spin ladder materials. In Chap. 2, we review the magnetic properties of hole-doped edge-sharing S=1/2 chains, a constituent of (Sr,Ca)14Cu24O41, after which the normal state properties of (Sr,Ca)14Cu24O41 are considered in Chap. 3, with emphasis on the effect of Ca substitution on charge dynamics of hole-doped two-leg ladders. Superconducting properties are then discussed in Chap. 4, being followed by Chap. 5 which discusses the consistency between theory and experiments of ladder and summarizes novel physical insights obtained by a series of experiments on (Sr,Ca)14Cu24O 41. Readers should note that our review is in addition to other excellent reviews on spin ladder system [3-5].

AB - The study of ladder materials has in recent years become one of the central issues in the field of condensed matter physics. Ladder materials, which contain a structural unit composed of coupled arrays of one-dimensional (1D) chains, are considered to be an interesting intermediate step between one- and two-dimensional (2D) systems [1-5]. In fact, it is now recognized that the crossover from 1D to 2D is far from straightforward and that ladder materials by themselves exhibit a variety of new physics. Historically, studies on ladder material were motivated by the discovery of hightransition- temperature (high-Tc) superconductors occurring in 2D spin-1/2 (S=1/2) Heisenberg antiferromagnets [6]. Two theoretical predictions have particularly triggered extensive research [1,2]. First, ladders made from an even number of spin-1/2 Heisenberg chains (even-leg ladders) are expected to have a unique spin-liquid ground state with short range spin correlation, where there exists a finite energy gap ("spin gap") to the lowest excited state. The spin gap, more frequently called the pseudogap, is a key feature of high-Tc superconductors, particularly in the low carrier concentration region. Ladder materials are in this context considered to be good references to gain insights into the pseudogap physics of high-Tc superconductors. Second, and a more intriguing hypothesis, is the possible occurrence of superconductivity in even-leg ladders when they are doped with holes, similar to the high-Tc materials in which holes are doped into 2D copper-oxygen (CuO2) planes. The symmetry of pairing is predicted to be d-wave like [7], adding to the similarities between doped ladders and doped 2D planes. Stimulated by these theoretical suggestions, intensive experimental studies have been carried out, with a variety of cuprate ladder materials having been newly discovered. For instance, (i) the existence of a spin gap was confirmed for SrCu 2O3, a prototype of a twoladder compound [8,9], (ii) hole-doping into two-legged ladders was first achieved on LaCuO2.5 by replacing La with Sr [10], and (iii) superconductivity at 12.5 K was observed in Sr14-xCaxCu24O41 under a pressure of 3 GPa [11]. Here, we review experimental results on cuprate spin ladder materials, emphasizing those for Sr14-xCaxCu 24O41. In Sec. 1.2, brief theoretical background is provided, while Sec. 1.3 introduces typical cuprate spin ladder materials. In Chap. 2, we review the magnetic properties of hole-doped edge-sharing S=1/2 chains, a constituent of (Sr,Ca)14Cu24O41, after which the normal state properties of (Sr,Ca)14Cu24O41 are considered in Chap. 3, with emphasis on the effect of Ca substitution on charge dynamics of hole-doped two-leg ladders. Superconducting properties are then discussed in Chap. 4, being followed by Chap. 5 which discusses the consistency between theory and experiments of ladder and summarizes novel physical insights obtained by a series of experiments on (Sr,Ca)14Cu24O 41. Readers should note that our review is in addition to other excellent reviews on spin ladder system [3-5].

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