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9 papers · 1 filter
Stability and structure of atomic chains on Si(111)
Corsin Battaglia, Philipp Aebi, Steven C. Erwin
We study the stability and structure of self-assembled atomic chains on Si(111) induced by monovalent, divalent and trivalent adsorbates, using first-principles total-energy calcul…
Dynamical and energetic instabilities in multi-component Bose-Einstein condensates in optical lattices
J. Ruostekoski, Zachary Dutton
We study dynamical and energetic instabilities in the transport properties of Bloch waves for atomic multi-component Bose-Einstein condensates in optical lattices in the tight-bind…
Bipolar spintronics: From spin injection to spin-controlled logic
Igor Zutic, Jaroslav Fabian, Steven C. Erwin
An impressive success of spintronic applications has been typically realized in metal-based structures which utilize magnetoresistive effects for substantial improvements in the pe…
Photoluminescence Spectroscopy of the Molecular Biexciton in Vertically Stacked Quantum Dot Pairs
M. Scheibner, I. V. Ponomarev, E. A. Stinaff +5
We present photoluminescence studies of the molecular neutral biexciton-exciton spectra of individual vertically stacked InAs/GaAs quantum dot pairs. We tune either the hole or the…
Dipole moments from atomic-number-dependent potentials in analytic density-functional theory
Brett I. Dunlap, Shashi P. Karna, Rajendra R. Zope +1
Molecular dipole moments of analytic density-functional theory are investigated. The effect of element-dependent exchange potentials on these moments are examined by comparison wit…
Mixing of two-electron spin states in a semiconductor quantum dot
S. C. Badescu, T. L. Reinecke
We show that the low lying spin states of two electrons in a semiconductor quantum dot can be strongly mixed by electron-electron asymmetric exchange. This mixing is generated by t…