L. P. He

Quantum Transport Evidence for the Three-Dimensional Dirac Semimetal Phase in Cd 3 As 2

We report the quantum transport properties of Cd₃As₂ single crystals in a magnetic field. A large linear quantum magnetoresistance is observed near room temperature. With decreasing temperature, the Shubnikov-de Haas oscillations appear in both the longitudinal resistance R(xx) and the transverse Hall resistance R(xy). From the strong oscillatory component ΔR(xx), a linear dependence of the Landau index n on 1/B is obtained, and it gives an n-axis intercept between 1/2 and 5/8. This clearly reveals a nontrivial π Berrys phase, which is a distinguished feature of Dirac fermions. Our quantum transport results provide bulk evidence for the existence of a three-dimensional Dirac semimetal phase in Cd₃As₂.

Drastic Pressure Effect on the Extremely Large Magnetoresistance in WTe2: Quantum Oscillation Study.

The quantum oscillations of the magnetoresistance under ambient and high pressure have been studied for WTe2 single crystals, in which extremely large magnetoresistance was discovered recently. By analyzing the Shubnikov-de Haas oscillations, four Fermi surfaces are identified, and two of them are found to persist to high pressure. The sizes of these two pockets are comparable, but show increasing difference with pressure. At 0.3 K and in 14.5 T, the magnetoresistance decreases drastically from 1.25×10(5)% under ambient pressure to 7.47×10(3)% under 23.6 kbar, which is likely caused by the relative change of Fermi surfaces. These results support the scenario that the perfect balance between the electron and hole populations is the origin of the extremely large magnetoresistance in WTe2.

Full superconducting gap in the doped topological crystalline insulator Sn0.6In0.4Te

The thermal conductivity of the doped topological crystalline insulator, Sn

Nodal superconductivity and superconducting dome in the layered superconductor Ta 4 Pd 3 Te 16

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Nodeless superconducting gaps in Ca 10 (Pt 4 -δAs 8 )((Fe 1 - x Pt x ) 2 As 2 ) 5 probed by quasiparticle heat transport

In

Nodeless superconducting gaps in Ca10(Pt4-δAs8)((Fe1-xPtx)2As2)5 probed by quasiparticle heat transport

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Pressure-induced superconductivity in the three-dimensional topological Dirac semimetal Cd 3 As 2

Te superconducting single crystal with

Observation of two superconducting domes under pressure in tetragonal FeS

T_c =

Nodeless superconductivity in a quasi-two-dimensional superconductor AuTe2Se4/3

4.1 K, was measured down to 50 mK. It is found that the residual linear term

Multiple nodeless superconducting gaps in noncentrosymmetric superconductor PbTaSe

\kappa_0/T