Quantum criticality and collective effects in low-dimensional magnet CuGeO 3:Fe probed by high frequency EPR

S. V. Demishev; A. V. Semeno; A. A. Pronin; N. E. Sluchanko; N. A. Samarin; H. Ohta; S. Okubo; M. Kimata; K. Koyama; M. Motokawa; A. V. Kuznetsov

doi:10.1007/s10948-006-0214-3

Quantum criticality and collective effects in low-dimensional magnet CuGeO ₃:Fe probed by high frequency EPR

S. V. Demishev, A. V. Semeno, A. A. Pronin, N. E. Sluchanko, N. A. Samarin, H. Ohta, S. Okubo, M. Kimata, K. Koyama, M. Motokawa, A. V. Kuznetsov

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

For CuGeO ₃ single crystals doped with 1% of Fe, the quantum critical behavior in a wide temperature range 1-40 K is reported. The critical exponents for susceptibility along different crystallographic axes are determined: α = 0.34 (B ∥ a and B ∥ c) and α = 0.31 (B ∥ b). The description of the temperature dependencies of the line width and g-factor could be obtained in the Oshikawa-Affleck theory assuming that staggered component of the magnetic moment is located predominantly along b-axis. Possible arguments favoring the competition between effects of the staggered field and antiferromagnetic ordering are provided.

Original language	English
Pages (from-to)	105-108
Number of pages	4
Journal	Journal of Superconductivity and Novel Magnetism
Volume	20
Issue number	2 SPECIAL ISSUE
DOIs	https://doi.org/10.1007/s10948-006-0214-3
Publication status	Published - 2007 Feb
Externally published	Yes

Keywords

CuGeO
EPR
Quantum critical phenomena

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1007/s10948-006-0214-3

Cite this

Demishev, S. V., Semeno, A. V., Pronin, A. A., Sluchanko, N. E., Samarin, N. A., Ohta, H., Okubo, S., Kimata, M., Koyama, K., Motokawa, M., & Kuznetsov, A. V. (2007). Quantum criticality and collective effects in low-dimensional magnet CuGeO ₃:Fe probed by high frequency EPR. Journal of Superconductivity and Novel Magnetism, 20(2 SPECIAL ISSUE), 105-108. https://doi.org/10.1007/s10948-006-0214-3

Demishev, SV, Semeno, AV, Pronin, AA, Sluchanko, NE, Samarin, NA, Ohta, H, Okubo, S, Kimata, M, Koyama, K, Motokawa, M & Kuznetsov, AV 2007, 'Quantum criticality and collective effects in low-dimensional magnet CuGeO ₃:Fe probed by high frequency EPR', Journal of Superconductivity and Novel Magnetism, vol. 20, no. 2 SPECIAL ISSUE, pp. 105-108. https://doi.org/10.1007/s10948-006-0214-3

@article{baafa98b988f4285a9e3206e23eb5412,

title = "Quantum criticality and collective effects in low-dimensional magnet CuGeO 3:Fe probed by high frequency EPR",

abstract = "For CuGeO 3 single crystals doped with 1% of Fe, the quantum critical behavior in a wide temperature range 1-40 K is reported. The critical exponents for susceptibility along different crystallographic axes are determined: α = 0.34 (B ∥ a and B ∥ c) and α = 0.31 (B ∥ b). The description of the temperature dependencies of the line width and g-factor could be obtained in the Oshikawa-Affleck theory assuming that staggered component of the magnetic moment is located predominantly along b-axis. Possible arguments favoring the competition between effects of the staggered field and antiferromagnetic ordering are provided.",

keywords = "CuGeO, EPR, Quantum critical phenomena",

author = "Demishev, {S. V.} and Semeno, {A. V.} and Pronin, {A. A.} and Sluchanko, {N. E.} and Samarin, {N. A.} and H. Ohta and S. Okubo and M. Kimata and K. Koyama and M. Motokawa and Kuznetsov, {A. V.}",

note = "Funding Information: The authors acknowledge the support from Russian Science Support Foundation, the RAS programs “Physics of Nanostructures” and “Strongly Correlated Electrons,” and the RFBR Grants 04-02-16574 and INTAS 03-51-3036. This work was partly supported by Hyogo Science and Technology Association and also by Grant-in-Aid for Science Research on Priority Areas (No. 13130204) from the Ministry of Education, Culture, Sports, Science and Technology of Japan.",

year = "2007",

month = feb,

doi = "10.1007/s10948-006-0214-3",

language = "English",

volume = "20",

pages = "105--108",

journal = "Journal of Superconductivity and Novel Magnetism",

issn = "1557-1939",

publisher = "Springer New York",

number = "2 SPECIAL ISSUE",

}

TY - JOUR

T1 - Quantum criticality and collective effects in low-dimensional magnet CuGeO 3:Fe probed by high frequency EPR

AU - Demishev, S. V.

AU - Semeno, A. V.

AU - Pronin, A. A.

AU - Sluchanko, N. E.

AU - Samarin, N. A.

AU - Ohta, H.

AU - Okubo, S.

AU - Kimata, M.

AU - Koyama, K.

AU - Motokawa, M.

AU - Kuznetsov, A. V.

N1 - Funding Information: The authors acknowledge the support from Russian Science Support Foundation, the RAS programs “Physics of Nanostructures” and “Strongly Correlated Electrons,” and the RFBR Grants 04-02-16574 and INTAS 03-51-3036. This work was partly supported by Hyogo Science and Technology Association and also by Grant-in-Aid for Science Research on Priority Areas (No. 13130204) from the Ministry of Education, Culture, Sports, Science and Technology of Japan.

PY - 2007/2

Y1 - 2007/2

N2 - For CuGeO 3 single crystals doped with 1% of Fe, the quantum critical behavior in a wide temperature range 1-40 K is reported. The critical exponents for susceptibility along different crystallographic axes are determined: α = 0.34 (B ∥ a and B ∥ c) and α = 0.31 (B ∥ b). The description of the temperature dependencies of the line width and g-factor could be obtained in the Oshikawa-Affleck theory assuming that staggered component of the magnetic moment is located predominantly along b-axis. Possible arguments favoring the competition between effects of the staggered field and antiferromagnetic ordering are provided.

AB - For CuGeO 3 single crystals doped with 1% of Fe, the quantum critical behavior in a wide temperature range 1-40 K is reported. The critical exponents for susceptibility along different crystallographic axes are determined: α = 0.34 (B ∥ a and B ∥ c) and α = 0.31 (B ∥ b). The description of the temperature dependencies of the line width and g-factor could be obtained in the Oshikawa-Affleck theory assuming that staggered component of the magnetic moment is located predominantly along b-axis. Possible arguments favoring the competition between effects of the staggered field and antiferromagnetic ordering are provided.

KW - CuGeO

KW - EPR

KW - Quantum critical phenomena

UR - http://www.scopus.com/inward/record.url?scp=33847403994&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33847403994&partnerID=8YFLogxK

U2 - 10.1007/s10948-006-0214-3

DO - 10.1007/s10948-006-0214-3

M3 - Article

AN - SCOPUS:33847403994

SN - 1557-1939

VL - 20

SP - 105

EP - 108

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

IS - 2 SPECIAL ISSUE

ER -