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Pis'ma v Zh. Èksper. Teoret. Fiz.:

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Pis'ma v Zh. Èksper. Teoret. Fiz., 2005, Volume 82, Issue 3, Pages 144–148 (Mi jetpl1522)  

This article is cited in 11 scientific papers (total in 11 papers)


Mechanism of carrier generation and the origin of the pseudogap and 60 K phases in YBCO

K. V. Mitsen, O. M. Ivanenko

P. N. Lebedev Physical Institute, Russian Academy of Sciences

Abstract: The mechanism of hole carrier generation is considered in the framework of a model assuming the formation of negative U centers (NUCs) in HTSC materials under doping. The calculated dependences of carrier concentration on the doping level and temperature are in quantitative agreement with experiment. An explanation is proposed for the pseudogap and 60 K phases in YBa2Cu3O6+δ. It is assumed that a pseudogap is of superconducting origin and arises at temperature T* > T c∞ > T c in small nonpercolating clusters as a result of strong fluctuations in the occupancy of NUCs (T c∞ and T c are the superconducting transition temperatures of an infinitely large and finite NUC clusters, respectively). The T*(δ) and T c(δ) dependences calculated for YBa2Cu3O6+δ correlate with experimental dependences. In accordance with the model, the region between T*(δ) and T c(δ) is the range of fluctuations in which finite nonpercolation clusters fluctuate between the superconducting and normal states due to NUC occupancy fluctuations.

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English version:
Journal of Experimental and Theoretical Physics Letters, 2005, 82:3, 129–133

Bibliographic databases:

Document Type: Article
PACS: 74.20.Mn, 74.40.+k
Received: 16.05.2005
Revised: 20.06.2005

Citation: K. V. Mitsen, O. M. Ivanenko, “Mechanism of carrier generation and the origin of the pseudogap and 60 K phases in YBCO”, Pis'ma v Zh. Èksper. Teoret. Fiz., 82:3 (2005), 144–148; JETP Letters, 82:3 (2005), 129–133

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    This publication is cited in the following articles:
    1. Tsendin K.D., Barygin I.A., Kapustin A.I., Popov B.P., “Influence of negative-U centers on the temperature dependence of the carrier concentration in the normal HTSC phase”, Zh Èksper Teoret Fiz, 105:4 (2007), 788–792  crossref  adsnasa  isi  scopus
    2. Vovk R.V., Obolenskii M.A., Zavgorodnii A.A., Bondarenko A.V., Gulatis I.L., Chebotaev N.N., “Effect of the redistribution of labile oxygen on the pseudogap state in untwinned single crystal YBa2Cu3O7-x”, Low Temperature Physics, 33:8 (2007), 710–712  crossref  adsnasa  isi  elib  scopus
    3. Vovk R.V., Obolenskii M.A., Bondarenko A.V., “Redistribution of carriers in oxygen-underdoped Y1Ba2Cu3O7-delta at high hydrostatic pressure”, Low Temperature Physics, 33:1 (2007), 94–96  crossref  mathscinet  adsnasa  isi  scopus
    4. Matic V.M., Lazarov N.D., Bradaric I.M., “Charge transfer mechanism and T-c(x) dependence in Y-0.8(Ca)(0.2)Ba2Cu3O6+x”, Superconductor Science & Technology, 21:7 (2008), 075012  crossref  adsnasa  isi  scopus
    5. Vovk R.X., Obolenskii M.A., Zavgorodniy A.A., Bondarenko A.X., Goulatis I.L., Samoilov A.X., Chroneos A., “Effect of high pressure on the fluctuation conductivity and the charge transfer of YBa2Cu3O7-delta single crystals”, Journal of Alloys and Compounds, 453:1–2 (2008), 69–74  crossref  isi  scopus
    6. Vovk R.V., Obolenskii M.A., Zavgorodniy A.A., Goulatis I.L., Beletskii V.I., Chroneos A., “Structural relaxation, metal-to-insulator transition and pseudo-gap in oxygen deficient HoBa2Cu3O7-delta single crystals”, Phys C, 469:5–6 (2009), 203–206  crossref  adsnasa  isi  elib  scopus
    7. Vovk R.V., Zavgorodniy A.A., Obolenskii M.A., Goulatis I.L., Chroneos A., Pinto Simoes V.M., “Effect of high pressure on the metal-dielectric transition and the pseudo-gap temperature range in oxygen deficient YBa2Cu3O7-delta single crystals”, Journal of Materials Science-Materials in Electronics, 22:1 (2011), 20–24  crossref  mathscinet  isi  scopus
    8. Vovk R.V., Nazyrov Z.F., Goulatis I.L., Chroneos A., Pinto Simoes V.M., “Metal-Insulator Transition and the Temperature of the Pseudogap Anomaly Opening in Praseodymium Doped Y1-Zprzba2Cu3O7-Delta Single Crystals”, Mod. Phys. Lett. B, 27:4 (2013), 1350029  crossref  adsnasa  isi  elib  scopus
    9. K. V. Mitsen, O. M. Ivanenko, “Superconducting phase diagrams of cuprates and pnictides as a key to understanding the HTSC mechanism”, Phys. Usp., 60:4 (2017), 402–411  mathnet  crossref  crossref  adsnasa  isi  elib
    10. Boiko Y.I., Bogdanov V.V., Vovk R.V., Ort A.G., Litvinov Yu.V., “Single-File Diffusion in Oxygen Underdoped Reba2Cu3O7-X (Re=Y, Ho) Single Crystals”, Funct. Mater., 24:4 (2017), 527–529  crossref  isi  scopus
    11. Boiko Y.I., Bogdanov V.V., Vovk R.V., Kamchatnaya S.N., Goulatis I.L., Chroneos A., “Relaxation of the Electric Resistance in Yba2Cu3O7-X Single Crystals At Room Temperature”, Mod. Phys. Lett. B, 31:16 (2017), 1750179  crossref  isi  scopus
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