Direct experimental evidence for atomic tunneling of europium in crystalline Eu8Ga16Ge30

Raphaël P. Hermann; Veerle Keppens; Pierre Bonville; George S. Nolas; Fernande Grandjean; Gary J. Long; Hans M. Christen; Bryan C. Chakoumakos; Brian C. Sales; David Mandrus

doi:10.1103/PhysRevLett.97.017401

Direct experimental evidence for atomic tunneling of europium in crystalline Eu8Ga16Ge30

Raphaël P. Hermann, Veerle Keppens, Pierre Bonville, George S. Nolas, Fernande Grandjean, Gary J. Long, Hans M. Christen, Bryan C. Chakoumakos, Brian C. Sales, David Mandrus

Single Crystal Diffraction

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Abstract

Mössbauer-effect and microwave absorption experimental evidence unambiguously demonstrates the presence of slow, ∼450MHz, tunneling of magnetic europium between four equivalent sites in Eu8Ga16Ge30, a stoichiometric clathrate. Remarkably, six of the eight europium atoms, or 11% of the constituents in this solid, tunnel between these four sites separated by 0.55 Å. The off centering of the atoms or ions in crystalline clathrates appears to be a promising route for producing Rabi oscillators in solid-state materials.

Original language	English
Article number	017401
Journal	Physical Review Letters
Volume	97
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.97.017401
State	Published - 2006

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10.1103/PhysRevLett.97.017401

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title = "Direct experimental evidence for atomic tunneling of europium in crystalline Eu8Ga16Ge30",

abstract = "M{\"o}ssbauer-effect and microwave absorption experimental evidence unambiguously demonstrates the presence of slow, ∼450MHz, tunneling of magnetic europium between four equivalent sites in Eu8Ga16Ge30, a stoichiometric clathrate. Remarkably, six of the eight europium atoms, or 11% of the constituents in this solid, tunnel between these four sites separated by 0.55 {\AA}. The off centering of the atoms or ions in crystalline clathrates appears to be a promising route for producing Rabi oscillators in solid-state materials.",

author = "Hermann, {Rapha{\"e}l P.} and Veerle Keppens and Pierre Bonville and Nolas, {George S.} and Fernande Grandjean and Long, {Gary J.} and Christen, {Hans M.} and Chakoumakos, {Bryan C.} and Sales, {Brian C.} and David Mandrus",

year = "2006",

doi = "10.1103/PhysRevLett.97.017401",

language = "English",

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journal = "Physical Review Letters",

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T1 - Direct experimental evidence for atomic tunneling of europium in crystalline Eu8Ga16Ge30

AU - Hermann, Raphaël P.

AU - Keppens, Veerle

AU - Bonville, Pierre

AU - Nolas, George S.

AU - Grandjean, Fernande

AU - Long, Gary J.

AU - Christen, Hans M.

AU - Chakoumakos, Bryan C.

AU - Sales, Brian C.

AU - Mandrus, David

PY - 2006

Y1 - 2006

N2 - Mössbauer-effect and microwave absorption experimental evidence unambiguously demonstrates the presence of slow, ∼450MHz, tunneling of magnetic europium between four equivalent sites in Eu8Ga16Ge30, a stoichiometric clathrate. Remarkably, six of the eight europium atoms, or 11% of the constituents in this solid, tunnel between these four sites separated by 0.55 Å. The off centering of the atoms or ions in crystalline clathrates appears to be a promising route for producing Rabi oscillators in solid-state materials.

AB - Mössbauer-effect and microwave absorption experimental evidence unambiguously demonstrates the presence of slow, ∼450MHz, tunneling of magnetic europium between four equivalent sites in Eu8Ga16Ge30, a stoichiometric clathrate. Remarkably, six of the eight europium atoms, or 11% of the constituents in this solid, tunnel between these four sites separated by 0.55 Å. The off centering of the atoms or ions in crystalline clathrates appears to be a promising route for producing Rabi oscillators in solid-state materials.

UR - http://www.scopus.com/inward/record.url?scp=33745767338&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.97.017401

DO - 10.1103/PhysRevLett.97.017401

M3 - Article

AN - SCOPUS:33745767338

SN - 0031-9007

VL - 97

JO - Physical Review Letters

JF - Physical Review Letters

IS - 1

M1 - 017401

ER -

Direct experimental evidence for atomic tunneling of europium in crystalline Eu8Ga16Ge30

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