Confinement effects on the roton in helium

P. E. Sokol; R. M. Dimeo; D. W. Brown; C. R. Anderson; W. G. Stirling; M. A. Adams; S. H. Lee; C. Rutiser; S. Komarneni

doi:10.1016/S0921-4526(97)00756-4

Confinement effects on the roton in helium

P. E. Sokol, R. M. Dimeo, D. W. Brown, C. R. Anderson, W. G. Stirling, M. A. Adams, S. H. Lee, C. Rutiser, S. Komarneni

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Inelastic neutron scattering measurements of the roton in superfluid helium confined in two different porosity aerogels are presented. The temperature dependence of the roton energy exhibits an anomalous crossover behavior at T_c = 1.9 K. Below T_c the roton energy is found to be weakly temperature dependent while above T_c it is very strongly temperature dependent. The roton lifetime for the confined liquid also displays a weak crossover behavior. A simple qualitative model for this behavior in terms of a confined length scale is discussed.

Original language	English (US)
Pages (from-to)	929-934
Number of pages	6
Journal	Physica B: Condensed Matter
Volume	241-243
DOIs	https://doi.org/10.1016/S0921-4526(97)00756-4
State	Published - 1997

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/S0921-4526(97)00756-4

Cite this

@article{51c2a65334c744e2ac46ec6b6c8c4527,

title = "Confinement effects on the roton in helium",

abstract = "Inelastic neutron scattering measurements of the roton in superfluid helium confined in two different porosity aerogels are presented. The temperature dependence of the roton energy exhibits an anomalous crossover behavior at Tc = 1.9 K. Below Tc the roton energy is found to be weakly temperature dependent while above Tc it is very strongly temperature dependent. The roton lifetime for the confined liquid also displays a weak crossover behavior. A simple qualitative model for this behavior in terms of a confined length scale is discussed.",

author = "Sokol, {P. E.} and Dimeo, {R. M.} and Brown, {D. W.} and Anderson, {C. R.} and Stirling, {W. G.} and Adams, {M. A.} and Lee, {S. H.} and C. Rutiser and S. Komarneni",

note = "Funding Information: We wish to acknowledge the support of the National Science Foundation (9624762, INT 92-14242 and 9600172)and of the Engineering Science Physical Research Council of the UK. We are grateful to the staff of ISIS and the CNRF for their assistance. The work on SPINS is based upon activities supported by the National Science Foundation under Agreement No. DMR-9423101. We would also would like to thank Dr. Paul Chaikin for useful discussions.",

year = "1997",

doi = "10.1016/S0921-4526(97)00756-4",

language = "English (US)",

volume = "241-243",

pages = "929--934",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Confinement effects on the roton in helium

AU - Sokol, P. E.

AU - Dimeo, R. M.

AU - Brown, D. W.

AU - Anderson, C. R.

AU - Stirling, W. G.

AU - Adams, M. A.

AU - Lee, S. H.

AU - Rutiser, C.

AU - Komarneni, S.

N1 - Funding Information: We wish to acknowledge the support of the National Science Foundation (9624762, INT 92-14242 and 9600172)and of the Engineering Science Physical Research Council of the UK. We are grateful to the staff of ISIS and the CNRF for their assistance. The work on SPINS is based upon activities supported by the National Science Foundation under Agreement No. DMR-9423101. We would also would like to thank Dr. Paul Chaikin for useful discussions.

PY - 1997

Y1 - 1997

N2 - Inelastic neutron scattering measurements of the roton in superfluid helium confined in two different porosity aerogels are presented. The temperature dependence of the roton energy exhibits an anomalous crossover behavior at Tc = 1.9 K. Below Tc the roton energy is found to be weakly temperature dependent while above Tc it is very strongly temperature dependent. The roton lifetime for the confined liquid also displays a weak crossover behavior. A simple qualitative model for this behavior in terms of a confined length scale is discussed.

AB - Inelastic neutron scattering measurements of the roton in superfluid helium confined in two different porosity aerogels are presented. The temperature dependence of the roton energy exhibits an anomalous crossover behavior at Tc = 1.9 K. Below Tc the roton energy is found to be weakly temperature dependent while above Tc it is very strongly temperature dependent. The roton lifetime for the confined liquid also displays a weak crossover behavior. A simple qualitative model for this behavior in terms of a confined length scale is discussed.

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UR - http://www.scopus.com/inward/citedby.url?scp=0031365530&partnerID=8YFLogxK

U2 - 10.1016/S0921-4526(97)00756-4

DO - 10.1016/S0921-4526(97)00756-4

M3 - Article

AN - SCOPUS:0031365530

SN - 0921-4526

VL - 241-243

SP - 929

EP - 934

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

ER -

Confinement effects on the roton in helium

Abstract

All Science Journal Classification (ASJC) codes

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