| Autor: |
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 |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Physical Review Research, Vol 6, Iss 3, p L032010 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2643-1564 |
| DOI: |
10.1103/PhysRevResearch.6.L032010 |
| Popis: |
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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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