Sharp quantum phase transition in the frustrated spin-1/2 Ising chain antiferromagnet CaCoV 2 O 7
Year: 2024
Type: article
Abstract: We report on a quantum critical behavior in the quasi-1D spin-1/2 zigzag frustrated chain antiferromagnet CaCoV 2 O 7 , induced by an applied magnetic field. Below T N = 3.3 K our zero-field neutron diffraction studies revealed the up-up-down-down spin structure, stabilized by an order-by-disorder phenomenon. At base temperature, the magnetic order is suppressed by an applied magnetic field ( B ), inducing a transition into a quantum paramagnetic state at B c = 3 T, as revealed by both neutron diffraction and ESR data. The transition exhibits an unusually sharp phase boundary with the critical exponent ϕ = 0.164 ( 3 ) ≈ 1 / 6 , in contrast to the earlier experimental observations for uniform spin-1/2 chain systems. Such a sharp QPT is anticipated due to a rare combination of spin-orbit coupling and competing NN and NNN exchange interactions J 1 and J 2 of the zigzag spin chain. Published by the American Physical Society 2024
Source: Physical Review Research
Authors: Isha, A. K. Bera, Guratinder Kaur, C. Stock, Koushik Chakraborty, Pascal Puphal, M. Isobe, K. Küster, Y. Skourski, L. Bhaskaran, S. A. Zvyagin, S. Luther, J. Gronemann, H. Kühne, C. Salazar Mejía, M. Pregelj, Thomas C. Hansen, S. D. Kaushik, David Voneshen, R. Kulkarni, N. P. Lalla, S. M. Yusuf, A. Thamizhavel, Arvind Kumar Yogi
Institutions: UGC DAE Consortium for Scientific Research, Bhabha Atomic Research Centre, Homi Bhabha National Institute, Max Planck Institute for Solid State Research, University of Edinburgh, Helmholtz-Zentrum Dresden-Rossendorf, Dresden High Magnetic Field Laboratory, Technische Universität Dresden, Jožef Stefan Institute, Jožef Stefan International Postgraduate School, Institut Langevin, Institut Laue-Langevin, UGC-DAE Consortium for Scientific Research, Mumbai Centre, Rutherford Appleton Laboratory, Royal Holloway University of London, Tata Institute of Fundamental Research
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
OpenAlex ID: W4400537388