R. Kumar

activity

20232026

collaborators

3 papers

cond-mat.str-el2026

NMR Determination of the Low-Field Magnetic Structure of the Cu-Based Mineral Rouaite Cu $_{2}$ (OH) $_{3}$ NO $_{3}$

Issei Niwata, R. Kumar, Aswathi Mannathanath Chakkingal +5

Frustrated interactions in the Cu-based mineral rouaite with alternating antiferromagnetic and ferromagnetic spin chains, Cu $_{2}$ (OH) $_{3}$ NO $_{3}$ , introduce non-trivial magnetic groun…

cond-mat.str-el2025

Evidence for spin liquid behavior in the frustrated three-dimensional $S = 1/2$ Heisenberg garnet NaCa $_{2}$ Cu $_{2}$ (VO $_{4}$ ) $_{3}$

Y. Alexanian, R. Kumar, H. Zeroual +10

Three-dimensional quantum spin liquids have remained elusive, hindered by reduced quantum fluctuations from larger lattice connectivity inherent to high-dimensional systems. Here,…

cond-mat.str-el2023

Survival of magnetic correlations above ordering temperature in a ferromagnetically ordered classical kagomé magnet: Li9Cr3(P2O7)3(PO4)2

R. Kumar, A. Chakraborty, S. Fukuoka +4

Motivated by the recent discovery of a semiclassical nematic spin liquid state in a Heisenberg kagomé antiferromagnet Li9Fe3(P2O7)3(PO4)2 (LFPO) with S=5/2 [Kermarrec et al. Phys.…

NMR Determination of the Low-Field Magnetic Structure of the Cu-Based Mineral Rouaite Cu2​(OH)3​NO3​

Evidence for spin liquid behavior in the frustrated three-dimensional S=1/2 Heisenberg garnet NaCa2​Cu2​(VO4​)3​

Survival of magnetic correlations above ordering temperature in a ferromagnetically ordered classical kagomé magnet: Li9Cr3(P2O7)3(PO4)2

NMR Determination of the Low-Field Magnetic Structure of the Cu-Based Mineral Rouaite Cu $_{2}$ (OH) $_{3}$ NO $_{3}$

Evidence for spin liquid behavior in the frustrated three-dimensional $S = 1/2$ Heisenberg garnet NaCa $_{2}$ Cu $_{2}$ (VO $_{4}$ ) $_{3}$