Comment on "Evidence for the immobile bipolaron formation in the paramagnetic state of the magnetoresistive manganites"

A Banerjee, S Bhattacharya, S Mollah, H Sakata, HD Yang, BK Chaudhuri

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Abstract

Recently, Zhao et al. [Phys. Rev. B 62, R11 949 (2000)] reported that bipolarons are formed in the high-temperature paramagnetic phase (above the metal-insulator transition temperature Tp) in oxygen-isotope-diffused epitaxial thin films of La0.75Ca0.25MnO3 and Nd0.75Sr0.25MnO3. But many earlier observations indicated the formation of small polarons in the said temperature range in different manganites. We have confirmed that the transport properties in the high-temperature phase (T>Tp) of the above manganites can be well explained by a small-polaron hopping mechanism and the consideration of bipolaron formation is inadequate. We have presented an explanation of the O-isotope effect on the transport properties of the same manganite sample studies by Zhao et al.
Original languageEnglish
Article number186401
JournalPhysical Review B
Volume68
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

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Manganites
Transport properties
Isotopes
Polarons
Metal insulator transition
Epitaxial films
Temperature
Superconducting transition temperature
Thin films
Oxygen

Cite this

@article{69284ef15f664e7eac968f89cc0b144a,
title = "Comment on {"}Evidence for the immobile bipolaron formation in the paramagnetic state of the magnetoresistive manganites{"}",
abstract = "Recently, Zhao et al. [Phys. Rev. B 62, R11 949 (2000)] reported that bipolarons are formed in the high-temperature paramagnetic phase (above the metal-insulator transition temperature Tp) in oxygen-isotope-diffused epitaxial thin films of La0.75Ca0.25MnO3 and Nd0.75Sr0.25MnO3. But many earlier observations indicated the formation of small polarons in the said temperature range in different manganites. We have confirmed that the transport properties in the high-temperature phase (T>Tp) of the above manganites can be well explained by a small-polaron hopping mechanism and the consideration of bipolaron formation is inadequate. We have presented an explanation of the O-isotope effect on the transport properties of the same manganite sample studies by Zhao et al.",
author = "A Banerjee and S Bhattacharya and S Mollah and H Sakata and HD Yang and BK Chaudhuri",
year = "2003",
doi = "10.1103/PhysRevB.68.186401",
language = "English",
volume = "68",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",

}

Comment on "Evidence for the immobile bipolaron formation in the paramagnetic state of the magnetoresistive manganites". / Banerjee, A; Bhattacharya, S; Mollah, S; Sakata, H; Yang, HD; Chaudhuri, BK.

In: Physical Review B, Vol. 68, 186401, 2003.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Comment on "Evidence for the immobile bipolaron formation in the paramagnetic state of the magnetoresistive manganites"

AU - Banerjee, A

AU - Bhattacharya, S

AU - Mollah, S

AU - Sakata, H

AU - Yang, HD

AU - Chaudhuri, BK

PY - 2003

Y1 - 2003

N2 - Recently, Zhao et al. [Phys. Rev. B 62, R11 949 (2000)] reported that bipolarons are formed in the high-temperature paramagnetic phase (above the metal-insulator transition temperature Tp) in oxygen-isotope-diffused epitaxial thin films of La0.75Ca0.25MnO3 and Nd0.75Sr0.25MnO3. But many earlier observations indicated the formation of small polarons in the said temperature range in different manganites. We have confirmed that the transport properties in the high-temperature phase (T>Tp) of the above manganites can be well explained by a small-polaron hopping mechanism and the consideration of bipolaron formation is inadequate. We have presented an explanation of the O-isotope effect on the transport properties of the same manganite sample studies by Zhao et al.

AB - Recently, Zhao et al. [Phys. Rev. B 62, R11 949 (2000)] reported that bipolarons are formed in the high-temperature paramagnetic phase (above the metal-insulator transition temperature Tp) in oxygen-isotope-diffused epitaxial thin films of La0.75Ca0.25MnO3 and Nd0.75Sr0.25MnO3. But many earlier observations indicated the formation of small polarons in the said temperature range in different manganites. We have confirmed that the transport properties in the high-temperature phase (T>Tp) of the above manganites can be well explained by a small-polaron hopping mechanism and the consideration of bipolaron formation is inadequate. We have presented an explanation of the O-isotope effect on the transport properties of the same manganite sample studies by Zhao et al.

U2 - 10.1103/PhysRevB.68.186401

DO - 10.1103/PhysRevB.68.186401

M3 - Article

VL - 68

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

M1 - 186401

ER -