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Origin of charge-orbital order in the half-doped manganites
(Physical Review Letters, 2002)
The microscopic origin of the charge and orbital order in the half-doped manganites is examined from ab initio density-functional calculations and exact diagonalization studies. It is shown that the dominant mechanism ...
Breather induced modification of the speed of sound
(Physical Review Letters, 2001)
The modification of the speed of sound induced by the presence of breathers in a quasi-one-dimensional magnetic chain is examined in the framework of the sine-Gordon model. Within the pseudoharmonic phonon approximation ...
High precision wavelength measurements of QED-sensitive forbidden transitions in highly charged argon ions
(Physical Review Letters, 2003)
We present the results of an experimental study of magnetic dipole (M1) transitions in highly charged argon ions (Ar X, Ar XI, Ar XIV, Ar XV) in the visible spectral range using an electron beam ion trap. Their wavelengths ...
D+(s0)(2317)-D-0(2308) mass difference as evidence for tetraquarks
(Physical Review Letters, 2005)
We argue that the anomalously small mass difference between the D-s0(+)(2317) and the recently observed D-0(2308) (Belle) state is the first smoking gun experimental evidence of their tetraquark [cq((qq) over bar)] structure. ...
Wedge-shaped potential and Airy-function electron localization in oxide superlattices
(Physical Review Letters, 2005)
Oxide superlattices and microstructures hold the promise for creating a new class of devices with unprecedented functionalities. Density-functional studies of the recently fabricated, lattice-matched perovskite titanates ...
Power controlled soliton stability and steering in lattices with saturable nonlinearity
(Physical Review Letters, 2004)
Dynamical properties of discrete solitons in nonlinear Schrodinger lattices with saturable nonlinearity are studied in the framework of the one-dimensional discrete Vinetskii-Kukhtarev model. Two stationary strongly localized ...
Origin of the Two-Dimensional Electron Gas Carrier Density at the LaAlO3 on SrTiO3 Interface
(Physical Review Letters, 2008)
Transport measurements of the two-dimensional electron gas at the LaAlO3-SrTiO3 interface have found a density of carriers much lower than expected from the polar catastrophe arguments. From a detail density-functional ...
pi N and pi pi N couplings of the Delta(1232) and its chiral partners
(Physical Review Letters, 2008)
We investigate the interactions and chiral properties of the four spin-3/2 baryons N(-)(D(13)), N(+)(P(13)) Delta(+)(P(33)), and Delta(-)(D(33)) together with the nucleon. We construct the SU(2)(R) X SU(2)(L) invariant ...
Orbital non-Fermi-liquid behavior in cubic ruthenates
(Physical Review Letters, 2008)
We peruse various anomalous physical responses of the cubic (ferromagnetic SrRuO3 and paramagnetic CaRuO3) ruthenates, such as fractional power-law conductivity, anomalous Raman line shapes, and Hall currents. We show how ...
Sodium pyroxene NaTiSi2O6: Possible haldane spin-1 chain system
(Physical Review Letters, 2004)
Using a density functional approach, we study the structural and magnetic properties of the pyroxene compound NaTiSi2O6. While all previous workers are taking that NaTiSi2O6 is a quasi-one-dimensional S=1/2 system, our ...