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1

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Quasiparticle lifetime broadening in resonant x-ray scattering of NH_{4} NO_{3} (2016)

John Vinson, Terrence Jach, Matthias Müller, Rainer Unterumsberger, and Burkhard Beckhoff

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-30

Beschreibung: Author(s): John Vinson, Terrence Jach, Matthias Müller, Rainer Unterumsberger, and Burkhard Beckhoff It has been previously shown that two effects cause dramatic changes in the x-ray absorption and emission spectra from the N K edge of the insulating crystal ammonium nitrate. First, vibrational disorder causes major changes in the absorption spectrum, originating not only from the thermal populatio… [Phys. Rev. B 94, 035163] Published Fri Jul 29, 2016

Schlagwort(e): Electronic structure and strongly correlated systems

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Disappearance of quasiparticles in a Bose lattice gas (2016)

David Chen, Carolyn Meldgin, Philip Russ, Brian De; Marco, and Erich Mueller

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-08-04

Beschreibung: Author(s): David Chen, Carolyn Meldgin, Philip Russ, Brian DeMarco, and Erich Mueller We use a momentum-space hole-burning technique implemented via stimulated Raman transitions to measure the momentum relaxation time for a gas of bosonic atoms trapped in an optical lattice. By changing the lattice potential depth, we observe a smooth crossover between relaxation times larger and sma… [Phys. Rev. A 94, 021601(R)] Published Wed Aug 03, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

Publiziert von American Physical Society (APS)

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3

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Band alignment in LaAlO_{3}/SrTiO_{3} oxide heterostructures inferred from hard x-ray photoelectron spectroscopy (2013)

G. Berner, A. Müller, F. Pfaff, J. Walde, C. Richter, J. Mannhart, S. Thiess, A. Gloskovskii, W. Drube, M. Sing, and R. Claessen

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2013-09-07

Beschreibung: Author(s): G. Berner, A. Müller, F. Pfaff, J. Walde, C. Richter, J. Mannhart, S. Thiess, A. Gloskovskii, W. Drube, M. Sing, and R. Claessen We present a detailed study of the electronic structure and band alignment in LaAlO 3 /SrTiO 3 oxide heterostructures by hard x-ray photoelectron spectroscopy. Our spectroscopic measurements find no evidence for the strong potential gradient within the polar LaAlO 3 film predicted by band theory. Due to... [Phys. Rev. B 88, 115111] Published Fri Sep 06, 2013

Schlagwort(e): Electronic structure and strongly correlated systems

Print ISSN: 1098-0121

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Thema: Physik

Publiziert von American Physical Society (APS)

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Collisionless spin dynamics in a magnetic field gradient (2015)

Junjun Xu, Qiang Gu, and Erich J. Mueller

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-04-11

Beschreibung: Author(s): Junjun Xu, Qiang Gu, and Erich J. Mueller We study the collisionless spin dynamics of a harmonically trapped Fermi gas in a magnetic field gradient. In the absence of interactions, the system evolution is periodic: the magnetization develops twists, which evolve into a longitudinal polarization. Recurrences follow. For weak interaction, the... [Phys. Rev. A 91, 043613] Published Fri Apr 10, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

Publiziert von American Physical Society (APS)

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Quantum simulation of a topological Mott insulator with Rydberg atoms in a Lieb lattice (2016)

A. Dauphin, M. Müller, and M. A. Martin-Delgado

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-04-12

Beschreibung: Author(s): A. Dauphin, M. Müller, and M. A. Martin-Delgado We propose a realistic scheme to quantum simulate the so-far experimentally unobserved topological Mott insulator phase—an interaction-driven topological insulator—using cold atoms in an optical Lieb lattice. To this end, we study a system of spinless fermions in a Lieb lattice, exhibiting repulsive… [Phys. Rev. A 93, 043611] Published Mon Apr 11, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

Publiziert von American Physical Society (APS)

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6

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Stability of a Bose-Einstein condensate in a driven optical lattice: Crossover between weak and tight transverse confinement (2016)

Sayan Choudhury and Erich J. Mueller

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-01-01

Beschreibung: Author(s): Sayan Choudhury and Erich J. Mueller We explore the effect of transverse confinement on the stability of a Bose-Einstein condensate loaded in a shaken one-dimensional or two-dimensional square lattice. We calculate the decay rate from two-particle collisions. We predict that if the transverse confinement exceeds a critical value, then,… [Phys. Rev. A 92, 063639] Published Thu Dec 31, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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7

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Ferroelectric properties of charge-ordered α−(BEDT−TTF)_{2}I_{3} (2015)

P. Lunkenheimer, B. Hartmann, M. Lang, J. Müller, D. Schweitzer, S. Krohns, and A. Loidl

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2015-06-18

Beschreibung: Author(s): P. Lunkenheimer, B. Hartmann, M. Lang, J. Müller, D. Schweitzer, S. Krohns, and A. Loidl A detailed investigation of the out-of-plane electrical properties of charge-ordered α − ( BEDT − TTF ) 2 I 3 provides clear evidence for ferroelectricity. Similar to multiferroic κ − ( BEDT − TTF ) 2 Cu [ N ( CN ) 2 ] Cl , the polar order in this material is ascribed to the occurrence of bond- and site-centered charge order... [Phys. Rev. B 91, 245132] Published Mon Jun 15, 2015

Schlagwort(e): Electronic structure and strongly correlated systems

Print ISSN: 1098-0121

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Thema: Physik

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8

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Anomalous charge pumping in a one-dimensional optical superlattice (2015)

Ran Wei and Erich J. Mueller

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2015-07-08

Beschreibung: Author(s): Ran Wei and Erich J. Mueller We model atomic motion in a sliding superlattice potential to explore “topological charge pumping” and to find optimal parameters for experimental observation of this phenomenon. We analytically study the band structure, finding how the Wannier states evolve as two sinusoidal lattices are moved rela… [Phys. Rev. A 92, 013609] Published Tue Jul 07, 2015

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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9

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Doping dependent plasmon dispersion in 2H-transition metal dichalcogenides (2016)

Eric Müller, Bernd Büchner, Carsten Habenicht, Andreas König, Martin Knupfer, Helmuth Berger, and Simo Huotari

American Physical Society (APS)

In: Physical Review B

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Publikationsdatum: 2016-07-06

Beschreibung: Author(s): Eric Müller, Bernd Büchner, Carsten Habenicht, Andreas König, Martin Knupfer, Helmuth Berger, and Simo Huotari We report the behavior of the charge carrier plasmon of 2 H -transition metal dichalcogenides (TMDs) as a function of intercalation with alkali metals. Intercalation and concurrent doping of the TMD layers have a substantial impact on plasmon energy and dispersion. While the plasmon energy shifts are … [Phys. Rev. B 94, 035110] Published Tue Jul 05, 2016

Schlagwort(e): Electronic structure and strongly correlated systems

Print ISSN: 1098-0121

Digitale ISSN: 1095-3795

Thema: Physik

Publiziert von American Physical Society (APS)

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Competing ground states of strongly correlated bosons in the Harper-Hofstadter-Mott model (2016)

Stefan S. Natu, Erich J. Mueller, and S. Das Sarma

American Physical Society (APS)

In: Physical Review A

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Publikationsdatum: 2016-06-11

Beschreibung: Author(s): Stefan S. Natu, Erich J. Mueller, and S. Das Sarma Using an efficient cluster approach, we study the physics of two-dimensional lattice bosons in a strong magnetic field in the regime where the tunneling is much weaker than the on-site interaction strength. We study both the dilute, hard-core bosons at filling factors much smaller than unity occupat… [Phys. Rev. A 93, 063610] Published Fri Jun 10, 2016

Schlagwort(e): Matter waves and collective properties of cold atoms and molecules

Print ISSN: 1050-2947

Digitale ISSN: 1094-1622

Thema: Physik

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