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Titolo:
Temperature-dependent self-doping effects on the metal-insulator transition of Tl2Ru2O7 - art. no. 165108
Autore:
Lee, JS; Lee, YS; Kim, KW; Noh, TW; Yu, JJ; Takeda, T; Kanno, R;
Indirizzi:
Seoul Natl Univ, Sch Phys, Seoul 151747, South Korea Seoul Natl Univ Seoul South Korea 151747 Phys, Seoul 151747, South Korea Seoul Natl Univ, Res Ctr Oxide Elect, Seoul 151747, South Korea Seoul NatlUniv Seoul South Korea 151747 lect, Seoul 151747, South Korea Seoul Natl Univ, Ctr Strongly Correlated Mat Res, Seoul 151747, South Korea Seoul Natl Univ Seoul South Korea 151747 Res, Seoul 151747, South Korea Kobe Univ, Dept Chem, Kobe, Hyogo 657, Japan Kobe Univ Kobe Hyogo Japan 657 be Univ, Dept Chem, Kobe, Hyogo 657, Japan
Titolo Testata:
PHYSICAL REVIEW B
fascicolo: 16, volume: 6416, anno: 2001,
pagine: 5108 -
SICI:
0163-1829(20011015)6416:16<5108:TSEOTM>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRONIC-STRUCTURES; RUTHENIUM OXIDES; SPECTRAL WEIGHT; DOUBLE EXCHANGE; PYROCHLORE; MAGNETORESISTANCE; BI2SR2CACU2O8; ABSORPTION; BISMUTH; CRYSTAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Lee, JS Seoul Natl Univ, Sch Phys, Seoul 151747, South Korea Seoul Natl Univ Seoul South Korea 151747 oul 151747, South Korea
Citazione:
J.S. Lee et al., "Temperature-dependent self-doping effects on the metal-insulator transition of Tl2Ru2O7 - art. no. 165108", PHYS REV B, 6416(16), 2001, pp. 5108

Abstract

We investigated temperature (T-) dependent optical conductivity spectra for Tl2Ru2O7, which shows a metal-insulator (MI) transition at T(MI)similar to 125 K. It was found that there is a strong mid-infrared peak and that itsT-dependent spectral weight changes are quite significant. In particular, its T dependences are similar to the doping dependences of the mid-infraredpeak in an externally doped Mott insulator. These intriguing phenomena canbe explained by self-doping for the Ru 4d states in the presence of an easily polarizable Tl cation. Moreover, the T-dependent amount of self-doping is found to be closely related to the MI transition.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/06/18 alle ore 17:04:37