Hall Effect Anisotropy in the Paramagnetic Phase of HoLuB Induced by Dynamic Charge Stripes.

A detailed study of charge transport in the paramagnetic phase of the cage-cluster dodecaboride Ho0.8Lu0.2B12 with an instability both of the fcc lattice (cooperative Jahn−Teller effect) and the electronic structure (dynamic charge stripes) was carried out at temperatures 1.

Evidence of symmetry lowering in antiferromagnetic metal TmBwith dynamic charge stripes.

Precise angle-resolved magnetoresistance (ARMR) and magnetization measurements have revealed (i) strong charge transport and magnetic anisotropy and (ii) emergence of a huge number of magnetic phases in the ground state of isotopicallyB-enriched single crystals of TmBantiferromagnetic (AF) metal with fcc crystal structure and dynamic charge stripes. We analyze for the first time the angular-phase diagrams of AF state of TmBreconstructed from experimental ARMR and magnetization data arguing that the symmetry lowering leads to the appearance of several radial phase boundaries between different phases in the AF state. It is proposed that the suppression of the indirect Ruderman-Kittel-Kasuya-Yosida (RKKY) exchange along ⟨110⟩ directions between nearest neighboring magnetic moments of Tmions and subsequent redistribution of conduction electrons to quantum fluctuations of the electron density (dynamic stripes) are the main factors responsible for the anisotropy.

Role of spin-glass behavior in the formation of exotic magnetic states in GdB.

Randomness and frustration are believed to be two crucial criteria for the formation of spin glass state. However, the spin freezing occurs in some well-ordered crystals below the related temperature T due to the instability of each spin state, which induces the variation of either magnetic moment value or exchange energy. Here we explore the new mechanism of the in-site originated disorder in antiferromagnets GdLaB and GdB, which is caused by the random mutual shifts of Gd spins from the centrally symmetrical positions in the regular cubic lattice.

Evolution of thermoelectric properties in EuYbBfamily.

Seebeck effect in the crystalline samples of EuYbB(= 0, 0.082, 0.127, 0.

Hylleraas' variational method with orthogonality restrictions.

In this paper, we suggest a new computational technique for the minimization of Hylleraas' functional with additional orthogonality restrictions imposed on the desired vectors. It is shown how Hylleraas' constrained problem can be reduced to an unconstrained one by minimal computational efforts. The asymptotic projection (AP) method proposed earlier to minimize Rayleigh's quotient subject to some orthogonality restrictions is applied to construct a modified Hylleraas' functional whose solution fulfills the required constraints automatically.