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Pis'ma v Zh. Èksper. Teoret. Fiz., 2016, Volume 103, Issue 1, Pages 32–37 (Mi jetpl4829)  

This article is cited in 3 scientific papers (total in 3 papers)

CONDENSED MATTER

Quasi-one-dimensional quantum spin liquid in the Cu(C$_4$H$_4$N$_2$)(NO$_3)_2$ insulator

V. R. Shaginyanab, V. A. Stephanovichc, K. G. Popovd, E. V. Kirichenkoe

a Clark Atlanta University, GA 30314 Atlanta, USA
b Konstantinov St. Petersburg Nuclear Physics Institute, National Research Centre "Kurchatov Institute", 188300 Gatchina, Russia
c Institute of Physics, Opole University, 45-052 Opole, Poland
d Komi Science Center UB of the RAS, 167982 Syktyvkar, Russia
e Institute of Mathematics and Informatics, Opole University, 45-052 Opole, Poland

Abstract: We analyze measurements of the magnetization, differential susceptibility and specific heat of quasi-one dimensional insulator Cu(C$_4$H$_4$N$_2$)(NO$_3$)$_2$ (CuPzN) subjected to magnetic fields. We show that the thermodynamic properties are defined by quantum spin liquid formed with spinons, with the magnetic field tuning the insulator CuPzN towards quantum critical point related to fermion condensation quantum phase transition (FCQPT) at which the spinon effective mass diverges kinematically. We show that the FCQPT concept permits to reveal and explain the scaling behavior of thermodynamic characteristics. For the first time, we construct the schematic $T{-}H$ (temperature–magnetic field) phase diagram of CuPzN, that contains Landau–Fermi-liquid, crossover and non-Fermi liquid parts, thus resembling that of heavy-fermion compounds.

Funding Agency Grant Number
Russian Science Foundation 14-22-00281
Russian Foundation for Basic Research 14-02-00044_
Saint Petersburg State University 11.38.658.2013
V.R.S. is supported by the Russian Science Foundation, Grant #14-22-00281.K.G.P. is partly supported by RFBR Grant #14-02-00044 and the Saint Petersburg State University Grant #11.38.658.2013.


DOI: https://doi.org/10.7868/S0370274X16010069

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English version:
Journal of Experimental and Theoretical Physics Letters, 2016, 103:1, 30–35

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Received: 23.11.2015
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Citation: V. R. Shaginyan, V. A. Stephanovich, K. G. Popov, E. V. Kirichenko, “Quasi-one-dimensional quantum spin liquid in the Cu(C$_4$H$_4$N$_2$)(NO$_3)_2$ insulator”, Pis'ma v Zh. Èksper. Teoret. Fiz., 103:1 (2016), 32–37; JETP Letters, 103:1 (2016), 30–35

Citation in format AMSBIB
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\by V.~R.~Shaginyan, V.~A.~Stephanovich, K.~G.~Popov, E.~V.~Kirichenko
\paper Quasi-one-dimensional quantum spin liquid in the Cu(C$_4$H$_4$N$_2$)(NO$_3)_2$ insulator
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2016
\vol 103
\issue 1
\pages 32--37
\mathnet{http://mi.mathnet.ru/jetpl4829}
\crossref{https://doi.org/10.7868/S0370274X16010069}
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\transl
\jour JETP Letters
\yr 2016
\vol 103
\issue 1
\pages 30--35
\crossref{https://doi.org/10.1134/S0021364016010136}
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    This publication is cited in the following articles:
    1. Shaginyan V.R. Msezane A.Z. Japaridze G.S. Popov K.G. Khodel V.A., Front. Phys., 11:5 (2016), 117103  crossref  isi  elib  scopus
    2. Shaginyan V.R. Stephanovich V.A. Popov K.G. Kirichenko E.V. Artamonov S.A., Ann. Phys.-Berlin, 528:6 (2016), 483–492  crossref  isi  scopus
    3. V. R. Shaginyan, V. A. Stephanovich, A. Z. Msezane, P. Schuck, J. W. Clark, M. Ya. Amusia, G. S. Japaridze, K. G. Popov, E. V. Kirichenko, J. Low Temp. Phys., 189:5-6 (2017), 410–450  crossref  isi  scopus
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