A5033811924- Physics of Superconductivity and Magnetism
- Advanced Condensed Matter Physics
- Magnetic properties of thin films
- Magnetic and transport properties of perovskites and related materials
- Topological Materials and Phenomena
- Iron-based superconductors research
- Quantum, superfluid, helium dynamics
- Rare-earth and actinide compounds
Nanjing University
2018-2023
Collaborative Innovation Center of Advanced Microstructures
2018-2023
Abstract The pairing mechanism in cuprates remains as one of the most challenging issues condensed matter physics. Recently, superconductivity was discovered thin films infinite-layer nickelate Nd 1-x Sr x NiO 2 (x = 0.12–0.25) which is believed to have similar 3d 9 orbital electrons that cuprates. Here we report single-particle tunneling measurements on superconducting films. We find predominantly two types spectra, shows a V-shape feature can be fitted well by d -wave gap function with...
Compounds with kagome lattice usually host many exotic quantum states, including the spin liquid, non-trivial topological Dirac bands and a strongly renormalized flat band, etc. Recently an interesting vanadium based family $A{\mathrm{V}}_{3}{\mathrm{Sb}}_{5}$ $(A=\mathrm{K},\mathrm{Rb},\text{or}\phantom{\rule{0.28em}{0ex}}\mathrm{Cs})$ was discovered, these materials exhibit multiple properties, unconventional saddle-point driving charge density wave (CDW) state, superconductivity,...
The superconducting state is formed by the condensation of Cooper pairs and protected gap. pairing interaction between two electrons a pair determines gap function. Thus, it pivotal to detect structure for understanding mechanism superconductivity. In cuprate superconductors, has been well established that may have d-wave This function an alternative sign change in momentum space. It however hard visualize this change. Here we report measurements scanning tunneling spectroscopy...
Abstract The pairing mechanism of high-temperature superconductivity in cuprates is regarded as one the most challenging issues condensed matter physics. core issue concerns how Cooper pairs are formed. Here we report spin-resolved tunneling measurements on extremely underdoped Bi 2 Sr 2− x La CuO 6+δ . Our data reveal that, when holes doped into system, antiferromagnetic order destroyed, while at same time an increasing density states (DOS) peaked around 200 meV appears within charge...
We observe proximity-induced superconductivity in situ prepared heterostructures constructed by topological insulator ${\mathrm{Bi}}_{2}{\mathrm{Te}}_{3}$ thin films and high-temperature cuprate superconductors ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$. The superconducting gap maximum is about 7.6 meV on the surface of with a thickness two quintuple layers, value decreases an increase film thickness. Moreover, quasiparticle interference data...
By measuring the spatial distribution of differential conductance near impurities on Fe sites, we have obtained quasi-particle interference (QPI) patterns in (Li$_{1-x}$Fe$_x$)OHFe$_{1-y}$Zn$_y$Se superconductor with only electron Fermi surfaces. taking Fourier transform these patterns, investigate scattering features between two circles pockets formed by folding or hybridization. We treat data using recent theoretical approach [arXiv:1710.09089] which is specially designed for impurity...
In cuprate superconductors, due to strong electronic correlations, there are multiple intertwined orders which either coexist or compete with superconductivity. Among them the antiferromagnetic (AF) order is most prominent one. region where superconductivity sets in, long-range AF destroyed. Yet residual short-range fluctuations present up a much higher doping and their role in emergence of superconducting phase still highly debated. Here, by using spin polarized scanning tunneling...
The pairing mechanism of high temperature superconductivity in cuprates is regarded as one the most challenging issues that we are facing now. core issue about how Cooper pairs formed. There plenty pictures concerning manner, and some them postulate local charge freedom through strong correlation effect. Here report spin resolved tunnelling measurements on extremely underdoped Bi2Sr2-xLaxCuO6-delta. Our data reveal that, when holes doped into system, antiferromagnetic order destroyed...