Probing the helium-graphite interaction
Abstract
Two separate lines of investigation have recently converged to produce a highly detailed picture of the behavior of helium atoms physisorbed on graphite basal plane surfaces. Atomic beam scattering experiments on single crystals have yielded accurate values for the binding energies of several· states for both (^4)He and (^3)He, as well as matrix elements of the largest Fourier component of the periodic part of the interaction potential. From these data, a complete three-dimensional description of the potential has been constructed, and the energy band structure of a helium atom moving in this potential calculated. At the same time, accurate thermodynamic measurements were made on submonolayer helium films adsorbed on Grafoil. The binding energy and low-coverage specific heat deduced from these measurements are in excellent agreement with those calculated from the band structures.
Additional Information
© 1981 American Physical Society. It is a pleasure to thank the many colleagues who have participated in various aspects of this work. We are particularly indebted to W. E. Carlos, G. Vidali, A. Silva-Moreira, J. Codona, J. M. Greif, W. A. Steele, L. Passell, and G. Boato. Support of this work by NSF Grants DMR77-22961 and DMR77-00036, and by DOE Contract DE-AC02-79ER10454 are also gratefully acknowledged.Attached Files
Published - COLrmp81.pdf
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Additional details
- Eprint ID
- 32537
- Resolver ID
- CaltechAUTHORS:20120717-162231284
- NSF
- DMR77-22961
- NSF
- DMR77-00036
- Department of Energy (DOE)
- DE-AC02-79ER10454
- Created
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2012-07-18Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field