Eu Doping in the GdCd Quasicrystal and Its Approximant Crystal GdCd.

The effect of Eu doping in the Tsai quasicrystal (QC) GdCd and its periodic 1/1 approximant crystal (AC) GdCd are investigated. This represents the first synthesis of Eu-containing stable QC samples, where three samples with the final composition GdEuCd at Eu doping concentrations = 0.06, 0.

2D crystal structure and anisotropic magnetism of GdAuAl (x ≈ 0.54).

Exploration of the gold-rich part of the ternary Gd-Au-Al system afforded the intermetallic compound GdAuAl (x ≈ 0.54) which was structurally characterized by single crystal X-ray diffraction (Pnma, a = 18.7847(4) Å, b = 23.

Magnetoquantum oscillations in the specific heat of a topological Kondo insulator.

Surprisingly, magnetoquantum oscillations (MQOs) characteristic of a metal with a Fermi surface have been observed in measurements of the topological Kondo insulator SmB. As these MQO have only been observed in measurements of magnetic torque (dHvA) and not in measurements of magnetoresistance (SdH), a debate has arisen as to whether the MQO are an extrinsic effect arising from rare-earth impurities, defects, and/or aluminum inclusions or an intrinsic effect revealing the existence of charge-neutral excitations. We report here the first observation of MQO in the low-temperature specific heat of SmB.

Superconducting YAuSi and Antiferromagnetic GdAuSi with an Interpenetrating Framework Structure Built from 16-Atom Polyhedra.

Investigations of reaction mixtures RE(AuSi) (RE = Y and Gd) yielded the compounds REAuSi which adopt a new structure type, referred to as GdAuSi structure (80, 4/, = 16, = 12.8244(6)/12.7702(2) Å, and = 9.

Unusual Interplay between Superconductivity and Field-Induced Charge Order in YBa_{2}Cu_{3}O_{y}.

We present a detailed study of the temperature (T) and magnetic field (H) dependence of the electronic density of states (DOS) at the Fermi level, as deduced from specific heat and Knight shift measurements in underdoped YBa_{2}Cu_{3}O_{y}. We find that the DOS becomes field independent above a characteristic field H_{DOS}, and that the H_{DOS}(T) line displays an unusual inflection near the onset of the long-range 3D charge-density wave order. The unusual S shape of H_{DOS}(T) is suggestive of two mutually exclusive orders that eventually establish a form of cooperation in order to coexist at low T.