Influence of doping on the Hall coefficient in Sr14− xCaxCu24O41

Scientific paper - Original scientific paper

• Author: Emil Tafra
• Author: Bojana Korin-Hamzić
• Author: Mario Basletić
• Author: Amir Hamzić
• Author: M. Dressel
• Author: J. Akimitsu
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

We present Hall-effect measurements of two-leg ladder compounds Sr14− xCaxCu24O41 (0<=x<=11.5) with the aim to determine the number of carriers participating in dc transport. Distribution of holes between the ladder and chain subsystems is one of the crucial questions important for understanding the physics of these compounds. Our Hall-effect and resistivity measurements show typical semiconducting behavior for x<11.5. However, for x=11.5, the results are completely different, and the Hall coefficient and resistivity behavior are qualitatively similar to that of high-temperature copper-oxide superconductors. We have determined the effective number of carriers at room temperature and compared it to the number of holes in the ladders obtained by other experimental techniques. We propose that going from x=0 to x=11.5 less than 1 hole per f.u. is added to the ladders and is responsible for a pronounced change in resistivity with Ca doping.

• Keywords (english): hole-doped quasi-one dimensional cuprates; spin-ladders; Hall effect
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical review B: Condensed matter and materials physics
• Numbering: vol. 78, no. 15, 155122
• p-ISSN: 1098-0121
• e-ISSN: 1550-235X
• DOI: https://doi.org/10.1103/PhysRevB.78.155122
• URN:NBN: urn:nbn:hr:217:654581
• Publication: 2008
• Project: Number: 035-0000000-2836; Title (croatian): Jako korelirani anorganski, organski i biomaterijali; Leader: Silvia Tomić; Jurisdiction: Croatia; Funding stream: ZP
• Project: Number: 119-1191458-1023; Title (croatian): Sustavi s prostornim i dimenzijskim ograničenjima: korelacije i spinski efekti; Leader: Amir Hamzić; Jurisdiction: Croatia; Funding stream: ZP
• Document URL: http://link.aps.org/doi/10.1103/PhysRevB.78.155122
• Type of resource: Text
• Access conditions: Open access
• Public note: Copyright (2008) by the American Physical Society. Received 16 July 2008; revised manuscript received 23 September 2008; published 22 October 2008.
• Created on: 2019-10-19 18:50:04