1.9k citations · 4.4k across the 26 of their papers we have counts for
26 papers
Metal to Mott Insulator Transition in Two-dimensional 1T-TaSe
Ning Tian, Zhe Huang, Bo Gyu Jang +17
When electron-electron interaction dominates over other electronic energy scales, exotic, collective phenomena often emerge out of seemingly ordinary matter. The strongly correlate…
A novel superstructure in epitaxially grown 1T-TaTe
Jinwoong Hwang, Yeongrok Jin, Canxun Zhang +13
The spontaneous formation of electronic orders is a crucial element for understanding complex quantum states and engineering heterostructures in two-dimensional materials. We repor…
Observation of a multitude of correlated states at the surface of bulk 1T-TaSe crystals
Yi Chen, Wei Ruan, Jeffrey D. Cain +5
The interplay between electron-electron interactions and structural ordering can yield exceptionally rich correlated electronic phases. We have used scanning tunneling microscopy t…
Evidence for a spinon Kondo effect in cobalt atoms on single-layer 1T-TaSe
Yi Chen, Wen-Yu He, Wei Ruan +13
Quantum spin liquids (QSLs) are highly entangled, disordered magnetic states that arise in frustrated Mott insulators and host exotic fractional excitations such as spinons and cha…
Imaging gate-tunable Tomonaga-Luttinger liquids in 1H-MoSe mirror twin boundaries
Tiancong Zhu, Wei Ruan, Yan-Qi Wang +15
One-dimensional electron systems (1DESs) exhibit properties that are fundamentally different from higher-dimensional systems. For example, electron-electron interactions in 1DESs h…
Imaging spinon density modulations in a 2D quantum spin liquid
Wei Ruan, Yi Chen, Shujie Tang +17
Two-dimensional triangular-lattice antiferromagnets are predicted under some conditions to exhibit a quantum spin liquid ground state whose low-energy behavior is described by a sp…
Visualizing Exotic Orbital Texture in the Single-Layer Mott Insulator 1T-TaSe2
Yi Chen, Wei Ruan, Meng Wu +18
Mott insulating behavior is induced by strong electron correlation and can lead to exotic states of matter such as unconventional superconductivity and quantum spin liquids. Recent…
Quasiparticle interference and charge order in a heavily overdoped non-superconducting cuprate
Xintong Li, Ying Ding, Chaocheng He +8
One of the key issues in unraveling the mystery of high Tc superconductivity in the cuprates is to understand the normal state outside the superconducting dome. Here we perform sca…
Visualizing the periodic modulation of Cooper pairing in a severely underdoped cuprate
Wei Ruan, Xintong Li, Cheng Hu +6
A major obstacle in understanding the mechanism of Cooper pairing in the cuprates is the existence of various intertwined orders associated with spin, charge, and Cooper pairs. Of…
The gluon condensation effects in the DAMPE cosmic ray spectrum of electrons and positrons
Wei Zhu Jiangshan Lan Jianhong Ruan, Fan Wang
Gluons dominate the proton behavior at high energy collisions, they can be condensed at ultra high energy. The collisions of the accelerated high energy protons with interplanetary…
Dimensional Crossover Induced Topological Hall Effect in a Magnetic Topological Insulator
Chang Liu, Yunyi Zang, Wei Ruan +5
We report transport studies of Mn-doped Bi2Te3 topological insulator (TI) films with accurately controlled thickness grown by molecular beam epitaxy. We find that films thicker tha…
Relationship between the parent charge transfer gap and maximum transition temperature in cuprates
Wei Ruan, Cheng Hu, Jianfa Zhao +10
One of the biggest puzzles concerning the cuprate high temperature superconductors is what determines the maximum transition temperature (Tc,max), which varies from less than 30 K…
Orbital-driven Mottness collapse in 1T-TaS2-xSex transition metal dichalcogenide
Shuang Qiao, Xintong Li, Naizhou Wang +9
The vicinity of a Mott insulating phase has constantly been a fertile ground for finding exotic quantum states, most notably the high Tc cuprates and colossal magnetoresistance man…
Characterization of collective ground states in single-layer NbSe2
Miguel M. Ugeda, Aaron J. Bradley, Yi Zhang +14
Layered transition metal dichalcogenides (TMDs) are ideal systems for exploring the effects of dimensionality on correlated electronic phases such as charge density wave (CDW) orde…
Structural phase transition and electronic structure evolution in Ir1-xPtxTe2 studied by scanning tunneling microscopy
Wei Ruan, Peizhe Tang, Aifang Fang +6
The IrTe2 transition metal dichalcogenide undergoes a series of structural and electronic phase transitions when doped with Pt. The nature of each phase and the mechanism of the ph…
Strong similarities between the local electronic structure of insulating iron pnictide and lightly doped cuprate
Cun Ye, Wei Ruan, Peng Cai +4
One of the major puzzles regarding unconventional superconductivity is how some of the most interesting superconductors are related to an insulating phase that lies in close proxim…
Probing the Role of Interlayer Coupling and Coulomb Interactions on Electronic Structure in Few-Layer MoSe2 Nanostructures
Aaron J. Bradley, Miguel M. Ugeda, Felipe H. da Jornada +11
Despite the weak nature of interlayer forces in transition metal dichalcogenide (TMD) materials, their properties are highly dependent on the number of layers in the few-layer two-…
Observation of giant bandgap renormalization and excitonic effects in a monolayer transition metal dichalcogenide semiconductor
Miguel M. Ugeda, Aaron J. Bradley, Su-Fei Shi +9
Two-dimensional (2D) transition metal dichalcogenides (TMDs) exhibit novel electrical and optical properties and are emerging as a new platform for exploring 2D semiconductor physi…
Emergence of a coherent in-gap state in SmB6 Kondo insulator revealed by scanning tunneling spectroscopy
Wei Ruan, Cun Ye, Minghua Guo +4
We use scanning tunneling microscopy to investigate the (001) surface of cleaved SmB6 Kondo insulator. Variable temperature dI/dV spectroscopy up to 60 K reveals a gap-like density…
Doping dependence of the anisotropic quasiparticle interference in NaFe1-xCoxAs iron-based superconductors
Peng Cai, Wei Ruan, Xiaodong Zhou +5
We use scanning tunneling microscopy to investigate the doping dependence of quasiparticle interference (QPI) in NaFe1-xCoxAs iron-based superconductors. The goal is to study the r…
High temperature superconductivity: Cooper pairs in trap
Wei Ruan
The tremendous efforts to unveil high temperature superconductivity (HTSC) have been devoted to the search of the mechanism underlying Cooper pairs which, however, remains a myster…
Visualizing the microscopic coexistence of spin density wave and superconductivity in underdoped NaFe1-xCoxAs
Peng Cai, Xiaodong Zhou, Wei Ruan +4
Although the origin of high temperature superconductivity in the iron pnictides is still under debate, it is widely believed that magnetic interactions or fluctuations play an impo…
Evolution from unconventional spin density wave to superconductivity and a novel gap-like phase in NaFe1-xCoxAs
Xiaodong Zhou, Peng Cai, Aifeng Wang +6
Similar to the cuprate high TC superconductors, the iron pnictide superconductors also lie in close proximity to a magnetically ordered phase. A central debate concerning the super…
Visualizing the atomic scale electronic structure of the Ca2CuO2Cl2 Mott insulator
Cun Ye, Peng Cai, Runze Yu +5
Although the mechanism of superconductivity in the cuprates remains elusive, it is generally agreed that at the heart of the problem is the physics of doped Mott insulators. The cu…