Crystal growth and transport properties of spin ladder compounds La4+4nCu8+2nO14+8n (n = 2, 3)

T. Watanabe, C. Sekar, H. Shibata, A. Matsuda, Y. Zenitani, Jun Akimitsu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Here we summarize recent progress on the study of spin ladder compounds, La2Cu2O5 (four-leg) and La8Cu7O19 (five-leg), n = 2 and 3 members of the homologous series La4+4nCu8+2nO14+8n. Following the successful crystal growth of La2Cu2O5, we grew a pure-phase five-leg system La8Cu7O19 by a modified slow cooling method. The room-temperature resistivity of the as-grown La8Cu7O19 crystal was 1.9 Ω cm, which is much lower than that of the La2Cu2O5 crystals (≈ 1.7 × 103 Ω cm). A significant drop in the resistivity (11.0 mΩ cm at 300 K) was observed upon hole doping by means of high oxygen-pressure annealing, although no transition was observed from the semiconducting behavior. In addition, a new crystal growth method to enhance hole doping level of La2Cu2O5 is shown.

Original languageEnglish
Pages (from-to)380-383
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume357-360
Issue numberSUPPL. 2
DOIs
Publication statusPublished - Aug 2001
Externally publishedYes

Fingerprint

Ladders
Crystallization
Crystal growth
ladders
Transport properties
crystal growth
transport properties
Doping (additives)
high pressure oxygen
Crystals
electrical resistivity
crystals
Annealing
Oxygen
Cooling
cooling
annealing
room temperature
Temperature

Keywords

  • AgO
  • Flux growth
  • LaCuO
  • La CuO
  • Resistivity
  • Single crystal
  • Spin ladder

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Crystal growth and transport properties of spin ladder compounds La4+4nCu8+2nO14+8n (n = 2, 3). / Watanabe, T.; Sekar, C.; Shibata, H.; Matsuda, A.; Zenitani, Y.; Akimitsu, Jun.

In: Physica C: Superconductivity and its Applications, Vol. 357-360, No. SUPPL. 2, 08.2001, p. 380-383.

Research output: Contribution to journalArticle

Watanabe, T. ; Sekar, C. ; Shibata, H. ; Matsuda, A. ; Zenitani, Y. ; Akimitsu, Jun. / Crystal growth and transport properties of spin ladder compounds La4+4nCu8+2nO14+8n (n = 2, 3). In: Physica C: Superconductivity and its Applications. 2001 ; Vol. 357-360, No. SUPPL. 2. pp. 380-383.
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KW - Spin ladder

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