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Stripe charge order driven manipulation of Majorana bound states in 2M-WS2 topological superconductor
Xuemin Fan, Xiaoqi Sun, Penghao Zhu +8
Majorana bound states (MBSs) are building blocks for topological quantum computing. They can be generated via the combination of electronic topology and superconductivity. To achie…
Discovery of smectic charge and pair-density-wave orders in topological monolayer 1T-MoTe
Li-Xuan Wei, Peng-Cheng Xiao, Fangsen Li +9
Electronic liquid-crystal phases are observed in numerous strongly-correlated systems including high-temperature superconductors. However, identifying these exotic phases and under…
Evidence for Band Renormalizations in Strong-coupling Superconducting Alkali-fulleride Films
J. S. Zhou, R. Z. Xu, X. Q. Yu +14
There has been a long-standing debate about the mechanism of the unusual superconductivity in alkali-intercalated fulleride superconductors. In this work, using high-resolution ang…
Observation of Coulomb blockade and Coulomb staircases in superconducting Pr0.8Sr0.2NiO2 films
Rui-Feng Wang, Yan-Ling Xiong, Hang Yan +7
Motivated by the discovery of superconductivity in the infinite-layer nickelate family, we report an experimental endeavor to clean the surface of nickelate superconductor Pr0.8Sr0…
Anomalous superconducting proximity effect of planar Pb-RhPb2 heterojunctions in the clean limit
Rui-Feng Wang, Yan-Ling Xiong, Qun Zhu +5
Interest in superconducting proximity effect has been revived by the exploitation of Andreev states and by the possible emergence of Majorana bound states at the interface. Spectro…
Real-space BCS-BEC crossover in FeSe monolayer
Haicheng Lin, Wantong Huang, Gautam Rai +7
The quantum many body states in the BCS-BEC crossover regime are of long-lasting interest. Here we report direct spectroscopic evidence of BCS-BEC crossover in real-space in a FeSe…
Identifying -wave pairing symmetry in single-layer FeSe from topologically trivial edge states
Zhongxu Wei, Shengshan Qin, Cui Ding +4
Determining the pairing symmetry of single-layer FeSe on SrTiO is the key to understanding the enhanced pairing mechanism; furthermore, it guides exploring new superconductors…
Percolative Superconductivity in Electron-Doped SrEuCuO Films
Xue-Qing Yu, Hang Yan, Li-Xuan Wei +7
Electron-doped infinite-layer SrEuCuO films over a wide doping range have been prepared epitaxially on SrTiO(001) using reactive molecular beam epitaxy. I…
Direct observation of nodeless superconductivity and phonon modes in electron-doped copper oxide SrNdCuO
Jia-Qi Fan, Xue-Qing Yu, Fang-Jun Cheng +8
The microscopic understanding of high-temperature superconductivity in cuprates has been hindered by the apparent complexity of crystal structures in these materials. We used scann…
Little-Parks like oscillations in lightly doped cuprate superconductors
Menghan Liao, Yuying Zhu, Shuxu Hu +5
Understanding the rich and competing electronic orders in cuprate superconductors may provide important insight into the mechanism of high-temperature superconductivity. Here, by m…
Tuning the electronic states and superconductivity in alkali fulleride films
Ming-Qiang Ren, Shu-Ze Wang, Sha Han +3
The successful preparation of superconducting alkali fulleride (AC, A = K, Rb, Cs) films using state-of-the-art molecular beam epitaxy overcomes the disadvantages of the…
High-Temperature Anomalous Metal States in Iron-Based Interface Superconductors
Yanan Li, Haiwen Liu, Haoran Ji +14
The nature of the anomalous metal state has been a major puzzle in condensed matter physics for more than three decades. Here, we report systematic investigation and modulation of…
Evolution of electronic structure in pristine and hole-doped kagome metal RbVSb
Jiawei Yu, Kebin Xiao, Yonghao Yuan +8
We report on in situ low-temperature (4 K) scanning tunneling microscope measurements of atomic and electronic structures of the cleaved surfaces of an alkali-based kagome metal Rb…
Coexistence of resistance oscillations and the anomalous metal phase in a lithium intercalated TiSe superconductor
Menghan Liao, Heng Wang, Yuying Zhu +6
Superconductivity and charge density wave (CDW) appear in the phase diagram of a variety of materials including the high - cuprate family and many transition metal dichalco…
Incommensurate smectic phase in close proximity to the high-Tc superconductor FeSe/SrTiO3
Yonghao Yuan, Xuemin Fan, Xintong Wang +4
Superconductivity is significantly enhanced in monolayer FeSe grown on SrTiO3, but not for multilayer films, in which large strength of nematicity develops. However, the link betwe…
Gate Tunable Supercurrent in Josephson Junctions Based on Bi2Te3 Topological Insulator Thin Films
Wei-Xiong Wu, Yang Feng, Yun-He Bai +13
We report transport measurements on Josephson junctions consisting of Bi2Te3 topological insulator (TI) thin films contacted by superconducting Nb electrodes. For a device with jun…
Merohedral disorder and impurity impacts on superconductivity of fullerenes
Shu-Ze Wang, Ming-Qiang Ren, Sha Han +3
Local quasiparticle states around impurities provide essential insight into the mechanism of unconventional superconductivity, especially when the candidate materials are proximate…
Origin of the Electronic Structure in Single-Layer FeSe/SrTiO3 Films
Defa Liu, Xianxin Wu, Fangsen Li +18
The accurate theoretical description of the underlying electronic structures is essential for understanding the superconducting mechanism of iron-based superconductors. Compared to…
The observation of in-plane quantum Griffiths singularity in two-dimensional crystalline superconductors
Yi Liu, Shichao Qi, Jingchao Fang +11
Quantum Griffiths singularity (QGS) reveals the profound influence of quenched disorder on the quantum phase transitions, characterized by the divergence of the dynamical critical…
Electronic inhomogeneity and band structure on superstructural CuO2 planes of infinite-layer Sr0.94La0.06CuO2+y films
Rui-Feng Wang, Jiaqi Guan, Yan-Ling Xiong +6
Scanning tunneling microscopy and spectroscopy are utilized to study the atomic-scale structure and electronic properties of infinite-layer Sr0.94La0.06CuO2+y films prepared on SrR…
Molecular beam epitaxy growth and surface structure of Sr1-xNdxCuO2 cuprate films
Jia-Qi Fan, Shu-Ze Wang, Xue-Qing Yu +5
We report on the epitaxial growth and surface structure of infinite-layer cuprate Sr1-xNdxCuO2 films on SrTiO3(001) substrates by combining ozone-assisted molecular beam epitaxy an…
Stoichiometry and defect superstructures in epitaxial FeSe films on SrTiO3
Xue-Qing Yu, Ming-Qiang Ren, Yi-Min Zhang +5
Cryogenic scanning tunneling microscopy is employed to investigate the stoichiometry and defects of epitaxial FeSe thin films on SrTiO3(001) substrates under various post-growth an…
Coexistence of full-gap superconductivity and pseudogap in two-dimensional fullerides
Ming-Qiang Ren, Sha Han, Shu-Ze Wang +4
Alkali-fulleride superconductors with a maximum critical temperature Tc of 40 K exhibit similar electronic phase diagram with unconventional high-Tc superconductors where the super…
Visualizing molecular orientational ordering and electronic structure in CsnC60 fulleride films
Sha Han, Meng-Xue Guan, Can-Li Song +5
Alkali-doped fullerides exhibit a wealth of unusual phases that remain controversial by nature. Here we report a cryogenic scanning tunneling microscopy study of the sub-molecular…