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Dive into the research topics where James P. Shaffer is active.

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Featured researches published by James P. Shaffer.


Physical Review B | 1999

Structure-properties phase diagram forLa1−xSrxMnO3(0.1<~x<~0.2)

B. Dabrowski; X. Xiong; Z. Bukowski; R. Dybzinski; P. W. Klamut; Joan Siewenie; Omar Chmaissem; James P. Shaffer; C. W. Kimball; J. D. Jorgensen; S. Short

By combining the results of magnetization, resistivity, and neutron powder-diffraction data for stoichiometric


Nature Photonics | 2010

Coherent excitation of Rydberg atoms in micrometre-sized atomic vapour cells

Harald Kübler; James P. Shaffer; T. Baluktsian; Robert Löw; Tilman Pfau

{\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3},


Physical Review Letters | 2013

Atom Based Vector Microwave Electrometry Using Rubidium Rydberg Atoms in a Vapor Cell

Jonathon Sedlacek; Arne Schwettmann; Harald Kübler; James P. Shaffer

we have constructed a phase diagram that describes the magnetic, transport, and structural properties and the relationships among them as a function of composition


Physical Review Letters | 2010

Rydberg trimers and excited dimers bound by internal quantum reflection.

Vera Bendkowsky; Björn Butscher; J. Nipper; Jonathan B. Balewski; James P. Shaffer; Robert Löw; Tilman Pfau; Weibin Li; Jovica Stanojevic; Thomas Pohl; Jan M. Rost

(0.1l~xl~0.2)


Physical Review Letters | 2015

Strongly Correlated Growth of Rydberg Aggregates in a Vapor Cell.

A. Urvoy; Fabian Ripka; Igor Lesanovsky; D. Booth; James P. Shaffer; Tilman Pfau; Robert Löw

and temperature (10--340 K). We show that, with increasing Sr content, the Curie temperature increases linearly, while the temperature of an orbital ordering transition to a state with a large coherent Jahn-Teller (JT) distortion decreases. These two phase-transition lines cross at


Physical Review Letters | 2012

Observation of blueshifted ultralong-range Cs2 Rydberg molecules.

Jonathan Tallant; Seth T. Rittenhouse; Donald Booth; H. R. Sadeghpour; James P. Shaffer

x=0.145


Journal of Physics B | 2015

Atom based RF electric field sensing

Haoquan Fan; Santosh Kumar; Jonathon Sedlacek; Harald Kübler; Shaya Karimkashi; James P. Shaffer

and


Science | 2015

Production of trilobite Rydberg molecule dimers with kilo-Debye permanent electric dipole moments

Donald Booth; Seth T. Rittenhouse; Jin Yang; H. R. Sadeghpour; James P. Shaffer

T=210\mathrm{K}.


Optics Letters | 2014

Subwavelength microwave electric-field imaging using Rydberg atoms inside atomic vapor cells.

Haoquan Fan; Santosh Kumar; Renate Daschner; H. Kübler; James P. Shaffer

When the transition to the ferromagnetic state occurs in a phase that has a large coherent JT distortion


Physical Review A | 2006

Cold Cs Rydberg-gas interactions

Arne Schwettmann; Jeff Crawford; K. Richard Overstreet; James P. Shaffer

(xl0.145),

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Haoquan Fan

University of Oklahoma

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L. G. Marcassa

University of São Paulo

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