Ruoshi Jiang
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View article: Charge order through crystallization of Frenkel excitons: realization in kagome metals
Charge order through crystallization of Frenkel excitons: realization in kagome metals Open
Charge order is a widely observed and representative example of spontaneous broken symmetries in quantum states of matter. Owing to the large intra-atomic Coulomb energy, the charge redistribution in such an order typically implies signifi…
View article: Band-Gap Tunability in Anharmonic Perovskite-Like Semiconductors Driven by Polar Electron–Phonon Coupling
Band-Gap Tunability in Anharmonic Perovskite-Like Semiconductors Driven by Polar Electron–Phonon Coupling Open
The ability to finely tune optoelectronic properties in semiconductors is crucial for the development of advanced technologies, ranging from photodetectors to photovoltaics. In this work, we propose a novel strategy to achieve such tunabil…
View article: 2D ferroelectricity accompanying antiferro-orbital order in semi-metallic WTe$_2$
2D ferroelectricity accompanying antiferro-orbital order in semi-metallic WTe$_2$ Open
The first switchable electric polarization in metals was recently discovered in bilayer and trilayer WTe2. Strangely, despite the tininess of the ordered polarization, the ferroelectricity survives up to 350 K, rendering the mechanism of s…
View article: Pressure-induced trans-proximate correlation in La$_4$Ni$_3$O$_{10}$ and possible routes to enhance its superconductivity
Pressure-induced trans-proximate correlation in La$_4$Ni$_3$O$_{10}$ and possible routes to enhance its superconductivity Open
We report an unexpected trans-proximate interlayer correlation (stronger correlation between disjoint layers than the adjacent ones) in the high-pressure phase of the recently discovered La$_4$Ni$_3$O$_{10}$ superconductors. Accompanied by…
View article: Giant thermally induced band-gap renormalization in anharmonic silver chalcohalide antiperovskites
Giant thermally induced band-gap renormalization in anharmonic silver chalcohalide antiperovskites Open
Silver chalcohalide antiperovskites (CAP), Ag 3 XY (X = S, Se; Y = Br, I), are a family of highly anharmonic inorganic compounds with great potential for energy applications.
View article: Giant Electron-Phonon Coupling Induced Band-Gap Renormalization in Anharmonic Silver Chalcohalide Antiperovskites
Giant Electron-Phonon Coupling Induced Band-Gap Renormalization in Anharmonic Silver Chalcohalide Antiperovskites Open
Silver chalcohalide antiperovskites (CAP), Ag$_{3}$XY (X = S, Se; Y = Br, I), are a family of highly anharmonic inorganic compounds with great potential for energy applications. However, a substantial and unresolved discrepancy exists betw…
View article: `Interaction annealing' to determine effective quantized valence and orbital structure: an illustration with ferro-orbital order in WTe$_2$
`Interaction annealing' to determine effective quantized valence and orbital structure: an illustration with ferro-orbital order in WTe$_2$ Open
Strongly correlated materials are known to display qualitatively distinct emergent behaviors at low energy. Conveniently, the superposition principle of quantum mechanics ensures that, upon absorbing quantum fluctuation, these rich low-ene…
View article: Universal low-temperature fluctuation of unconventional superconductors revealed: 'Smoking gun' leaves proper bosonic superfluidity the last theory standing
Universal low-temperature fluctuation of unconventional superconductors revealed: 'Smoking gun' leaves proper bosonic superfluidity the last theory standing Open
Low-temperature thermal fluctuations offer an essential window in characterizing the true nature of a quantum state of matter, a quintessential example being Fermi liquid theory. Here, we examine the leading thermal fluctuation of the supe…
View article: Geometric inhibition of superflow in single-layer graphene suggests a staggered-flux superconductivity in bilayer and trilayer graphene
Geometric inhibition of superflow in single-layer graphene suggests a staggered-flux superconductivity in bilayer and trilayer graphene Open
In great contrast to the numerous discoveries of superconductivity in layer-stacked graphene systems, the absence of superconductivity in the simplest and cleanest monolayer graphene remains a big puzzle. Here, through realistic computatio…
View article: Variation of carrier density in semimetals via short-range correlation: A case study with nickelate <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>NdNiO</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
Variation of carrier density in semimetals via short-range correlation: A case study with nickelate Open
Carrier density is one of the key controlling factors of material properties, particularly in controlling the essential correlations in strongly correlated materials. Typically, carrier density is externally tuned by doping or gating and r…
View article: Pressure Driven Fractionalization of Ionic Spins Results in Cupratelike High-$T_c$ Superconductivity in La$_3$Ni$_2$O$_7$
Pressure Driven Fractionalization of Ionic Spins Results in Cupratelike High-$T_c$ Superconductivity in La$_3$Ni$_2$O$_7$ Open
Beyond 14GPa of pressure, bi-layered La$_3$Ni$_2$O$_7$ was recently found to develop strong superconductivity above the liquid nitrogen boiling temperature. An immediate essential question is the pressure-induced qualitative change of elec…
View article: Variation of carrier density in semimetals via short-range correlation: A case study with nickelate NdNiO$_2$
Variation of carrier density in semimetals via short-range correlation: A case study with nickelate NdNiO$_2$ Open
Carrier density is one of the key controlling factors of material properties, particularly in controlling the essential correlations in strongly correlated materials. Typically, carrier density is externally tuned by doping or gating and r…
View article: Proposal to improve Ni-based superconductors via enhanced charge transfer
Proposal to improve Ni-based superconductors via enhanced charge transfer Open
Recently discovered superconductivity in hole-doped nickelate\nNd$_{0.8}$Sr$_{0.2}$NiO$_2$ has attracted intensive attention in the field. An\nimmediate question is how to improve its superconducting properties. Guided by\nthe key characte…
View article: Strongly correlated doped hole carriers in the superconducting nickelates: Their location, local many-body state, and low-energy effective Hamiltonian
Strongly correlated doped hole carriers in the superconducting nickelates: Their location, local many-body state, and low-energy effective Hamiltonian Open
The families of high-temperature superconductors recently welcomed a new\nmember: hole doped nickelate Nd$_{0.8}$Sr$_{0.2}$NiO$_2$ with a $\\sim$15K\ntransition temperature. To understand its emergent low-energy behaviors and\nexperimental…
View article: A proposal to improve Ni-based superconductors
A proposal to improve Ni-based superconductors Open
Recently discovered superconductivity in hole-doped nickelate Nd$_{0.8}$Sr$_{0.2}$NiO$_2$ caught intensive attention in the field. An immediate question is how to improve its superconducting properties. Guided by the key characteristics of…