Acta Physica Sinica, Volume. 69, Issue 2, 020301-1(2020)
Fig. 1. Transport measurements of Au2Pb: (a)
Fig. 2. Device schematic and superconductivity characteristics[62]: (a) Cartoon illustration of the device structure and the crystal structure of monolayer WTe2; (b) optical microscopy image of device 1; (c) temperature dependence of the resistance for
Fig. 3. Resistance characterization of WTe2 device in the superconducting regime: (a)
Fig. 4. SC in Bi2Te3 and Bi2Se3 induced by pressure: (a) SC transition in Bi2Te3 at various pressures[70]; (b) SC phase diagram and Hall coefficient as a function of pressure[70] in Bi2Te3; (c) SC transition in Bi2Se3 at various pressures[68]; (d) phase diagram and carrier density as a function of pressure in Bi2Se3[68]. 高压诱导的Bi2Te3和Bi2Se3中的超导 (a) 不同压强下Bi2Te3中的超导相变[70]; (b) Bi2Te3的相图和霍尔系数与压强的关系[70]; (c) 不同压强下Bi2Se3中的超导相变[68]; (d) Bi2Se3的相图和载流子浓度与压强的关系[68]
Fig. 6. Pressure induced SC in WTe2 and pressure enhanced SC in MoTe2: (a) Lattice parameters and
Fig. 7. Unconventional superconductivity in Cu
Fig. 8. Superconductivity in S doped MoTe2 (MoTe1.8S0.2): (a)
Fig. 9. Schematic diagram of a spin selective tip on a vortex: (a) Illustration of spin selective Andreev reflection in spin polarized (M↑) STM/STS on a vortex center
Fig. 10. Topological superconductivity and Majorana zero modes in the topological edge state of a Bi(111) bilayer: (a) Schematic representation of a hexagonal Bi bilayer island sitting on the surface of a Bi(111) thin film and exhibiting topological helical states on every other edge. Topological superconductivity DSC is induced into these helical states by superconducting proximity from the underlying Nb(110) substrate. Attaching a ferromagnetic cluster to the bilayer edge can open a magnetic hybridization gap. An MZM is localized at the mass domain wall, which is realized at the cluster-helical edge state interface, and can be detected in STM experiments; (b) spatially resolved low-energy local density of states (LDOS) calculated from a tight binding model for the edge state cluster arrangement shown in (a). The LDOS is a spectroscopic line cut taken along the
Fig. 11. Schematics of three common point contact confi-guration: (a) Tunneling junction fabricated by nanolithography; (b) soft point contact using silver paint; (c) hard point contact configuration, also called needle-anvil confi-guration. From Ref. [118]. 三种点接触结构的示意图 (a) 用纳米微加工技术实现的隧穿结; (b) 使用银胶的软点接触; (c) 针尖硬点接触. 引自文献[118]
Fig. 12. Tip induced superconductivity in topological semimetal Cd3As2 and TaAs: (a) Zero-bias point contact differential resistance of Cd3As2 as a function of temperature with W tip, magnetic field suppresses resistance drop, which signals a SC transition[121]; (b) normalized point contact differential conductance spectrum of Cd3As2 with W tip[121]; (c), (d) superconductivity in TaAs induced by PtIr tip[123]. 针尖点接触在拓扑半金属Cd3As2和TaAs中诱导的超导 (a) Cd3As2中零偏压点接触微分电导与温度的关系, 电阻的下降可以被磁场抑制, 这意味着它代表超导相变, 插图是针尖点接触实验装置示意图[121]; (b) 不同温度下归一化的钨针尖Cd3As2点接触微分电导谱[121]; (c), (d) PtIr针尖点接触在TaAs中测得的超导[123]
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Kai-Yuan Gu, Tian-Chuang Luo, Jun Ge, Jian Wang.
Received: Oct. 24, 2019
Accepted: --
Published Online: Nov. 9, 2020
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