$S$ = 1/2 Ising kagome antiferromagnets (KAFs) are rare in reality. In this work, we report the magnetic ground state and field-induced transitions of an antiferromagnet with a stacked geometry, Na$_5$Co$_{15.5}$Te$_6$O$_{36}$. Upon cooling, susceptibility measurement reveals three successive at $T_1$ 45.2 K, $T_2$ 35.4 $T_3 \sim$ 20 K. When field is applied along $c$ axis, strikingly anomalous...

Groundstate magnetism of the one-band Hubbard model on frustrated square lattice where both nearest-neighbour $t_1$ and next-nearest-neighbour $t_2$ hoppings are considered at half-filling revisited within mean field approximation. Two new magnetic phases detected intermediate strength $U$ relative strong frustration $t_2/t_1$, named double-stripe plaquette antiferromagnetic states, which metal...

$S$ = 1/2 Ising kagome antiferromagnets (KAFs) are rare in reality. In this work, we report the magnetic ground state and field-induced transitions of an antiferromagnet with a stacked geometry, Na$_5$Co$_{15.5}$Te$_6$O$_{36}$. Upon cooling, susceptibility measurement reveals three successive at $T_1$ 45.2 K, $T_2$ 35.4 $T_3 \sim$ 20 K. When field is applied along $c$ axis, strikingly anomalous...

Let \(a,n \in \mathbb Z^+\), with \(a<n\) and \(\gcd (a,n)=1\). \(P_{a,n}\) denote the lattice parallelogram spanned by (1, 0) (a, n), that is, $$P_{a,n} = \left\{ t_1(1,0)+ t_2(a,n) \, : 0\le t_1,t_2 \le 1 \right\} , $$ and let $$V(a,n) \# \text { of visible points in interior } P_{a,n}.$$ In this paper we prove some elementary (and straightforward) results for V(a, n). The most ...

The heavy fluxonium at zero external flux has a long-lived state when coupled capacitively to any other system. We analyze it by projecting all the relevant operators into qutrit subspace, as this configuration corresponds second excited level. This becomes bound-state in continuum (BIC) coupling occurs an extended system supporting of modes. In case without noise, we find BIC lifetimes that ca...

We derive $ab$ $initio$ low-energy effective Hamiltonians (LEH) for high-temperature superconducting (SC) copper oxides Bi$_2$Sr$_2$CuO$_6$ (Bi2201, $N_{\ell}=1$, $T_c^{\rm exp} \sim 10$ K), Bi$_2$Sr$_2$CaCu$_2$O$_8$ (Bi2212, $N_{\ell}=2$, 84$ HgBa$_2$CuO$_4$ (Hg1201, 90$ K) and CaCuO$_2$ (Ca11, $N_{\ell}=\infty$, 110$ with different experimental optimal SC transition temperature exp}$ number $...

We present the structural and magnetic properties of KNaCuP$_2$O$_7$ investigated via x-ray diffraction, magnetization, specific heat, $^{31}$P NMR $^{23}$Na measurements complementary electronic structure calculations. The temperature dependent susceptibility shift could be modeled very well by uniform spin-$1/2$ Heisenberg antiferromagnetic chain model with nearest-neighbour interaction $J/k_...

Abstract We consider two $$C_0$$ C 0 -semigroups on function spaces or, more generally, Banach lattices and give necessary sufficient conditions for the orbits of first semigroup to dominate second large times. As an important special case we $$L^2$$ ...