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Nanoclustering phase competition induces the resistivity hump in colossal magnetoresistive manganites
Kalpataru Pradhan, Seiji Yunoki
Using a two-band double-exchange model with Jahn-Teller lattice distortions and super-exchange interactions, supplemented by quenched disorder, at electron density , we exp…
Exciton-phonon cooperative mechanism of the triple- charge-density-wave and antiferroelectric electron polarization in TiSe
Tatsuya Kaneko, Yukinori Ohta, Seiji Yunoki
We investigate the microscopic mechanisms of the charge-density-wave (CDW) formation in a monolayer TiSe using a realistic multiorbital - model with electron-phonon coupl…
Slater Insulator in Iridate Perovskites with Strong Spin-Orbit Coupling
Q. Cui, J. -G. Cheng, W. Fan +17
The perovskite SrIrO3 is an exotic narrow-band metal owing to a confluence of the strengths of the spin-orbit coupling (SOC) and the electron-electron correlations. It has been pro…
Critical behavior of the two-dimensional icosahedron model
Hiroshi Ueda, Kouichi Okunishi, Roman Krčmár +3
In the context of a discrete analogue of the classical Heisenberg model, we investigate critical behavior of the icosahedron model, where the interaction energy is defined as the i…
Topological interpretation of Luttinger theorem
Kazuhiro Seki, Seiji Yunoki
Based solely on the analytical properties of the single-particle Green's function of fermions at finite temperatures, we show that the generalized Luttinger theorem inherently poss…
Theoretical Prediction of Two-Dimensional Functionalized MXene Nitrides as Topological Insulators
Yunye Liang, Mohammad Khazaei, Ahmad Ranjbar +5
Recently, two-dimensional (2D) transition metal carbides and nitrides, namely, MXenes have attracted lots of attention for electronic and energy storage applications. Due to a larg…
Direct experimental observation of the molecular Jeff=3/2 ground state in the lacunar spinel GaTa4Se8
Min Yong Jeong, Seo Hyoung Chang, Beom Hyun Kim +9
Strong spin-orbit coupling lifts the degeneracy of t2g orbitals in 5d transition-metal systems, leaving a Kramers doublet and quartet with effective angular momentum of Jeff = 1/2…
Unravelling local spin polarization of Zhang-Rice singlet in lightly hole-doped cuprates using high-energy optical conductivity
Iman Santoso, Wei Ku, Tomonori Shirakawa +11
Unrevealing local magnetic and electronic correlations in the vicinity of charge carriers is crucial in order to understand rich physical properties in correlated electron systems.…
Spin-anisotropic magnetic impurity in a Fermi gas: poor man's scaling equation integration
Eugene Kogan, Kazuto Noda, Seiji Yunoki
We consider a single magnetic impurity described by the spin--anisotropic s-d(f) exchange (Kondo) model and formulate scaling equation for the spin-anisotropic model when the densi…
Electronic properties and applications of MXenes: a theoretical review
Mohammad Khazaei, Ahmad Ranjbar, Masao Arai +2
Recent chemical exfoliation of layered MAX phase compounds to novel two-dimensional transition metal carbides and nitrides, so called MXenes, has brought new opportunity to materia…
Phase Competition and Superconductivity in -(BEDT-TTF)X: Importance of Intermolecular Coulomb Interactions
Hiroshi Watanabe, Hitoshi Seo, Seiji Yunoki
We theoretically study the competition among different electronic phases in molecular conductors -(BEDT-TTF)X. The ground-state properties of a 3/4-filled extended Hubbard m…