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Randy L. Headrick

Cornell University

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Featured researches published by Randy L. Headrick.

MRS Proceedings | 1998

Real-Time X-Ray Scattering Study of Surface Dynamics on Au(111) During Ar+ Ion Irradiation

M. V. Ramana Murty; T. Curcic; A. Judy; B. H. Cooper; Arthur R. Woll; Joel D. Brock; S. Kycia; Randy L. Headrick

X-ray scattering is used to investigate the surface dynamics on Au(111) during Ar + ion irradiation. During 500 eV Ar + ion irradiation, we observe the three regimes of step retraction, quasi-layer-by-layer removal and three dimensional rough erosion, analagous to molecular beam epitaxy. The quasi-layer-by-layer sputtering regime has been studied to identify similarities and differences in surface evolution during ion irradiation and molecular beam epitaxy. X-ray measurements suggest that 500 eV Ar + ion irradiation does not lead to stable adatom island formation. Also, in contrast to molecular beam epitaxy, adatom detachment and diffusion seems important in describing the surface kinetics during ion irradiation.

Physical Review Letters | 1998

X-RAY SCATTERING STUDY OF THE SURFACE MORPHOLOGY OF AU(111) DURING AR+ IONIRRADIATION

M. V. Ramana Murty; T. Curcic; A. Judy; B. H. Cooper; Arthur R. Woll; Joel D. Brock; S. Kycia; Randy L. Headrick

Physical Review B | 1999

Real-time x-ray scattering study of surface morphology evolution during ion erosion and epitaxial growth of AuÑ111Ö

M. V. Ramana Murty; T. Curcic; A. Judy; B. H. Cooper; Arthur R. Woll; Joel D. Brock; S. Kycia; Randy L. Headrick

Physical Review B | 1996

Real-time x-ray-scattering measurement of the nucleation kinetics of cubic gallium nitride on beta -SiC(001).

Randy L. Headrick; S. Kycia; Park Yk; Arthur R. Woll; Joel D. Brock

Physical Review Letters | 1999

GAN NUCLEATION AND GROWTH ON SAPPHIRE (0001) : INCORPORATION AND INTERLAYER TRANSPORT

Arthur R. Woll; Randy L. Headrick; S. Kycia; Joel D. Brock

MRS Proceedings | 1999

Roughening of Au(111) Surfaces During Ion Beam Erosion: A Scanning Tunneling Microscope and X-Ray Diffraction Study

A. Judy; M. V. Ramana Murty; E. N. Butler; Joshua M. Pomeroy; B. H. Cooper; Arthur R. Woll; Joel D. Brock; S. Kycia; Randy L. Headrick

Archive | 2001

Effects of Abrupt Changes in the Strain State of Epitaxial Colossal Magnetoresistance Thin Films on BaTiO_3

Darren Dale; Aaron Fleet; Joel D. Brock; Randy L. Headrick; Y. Suzuki

Archive | 2000

Ga adlayer kinetics during GaN(000\overline1) homoepitaxy

Arthur R. Woll; Joel D. Brock; Oana Malis; Randy L. Headrick

Archive | 1998

Thermal Relaxation of a Sputter-Roughened Au(111) Surface: Dependence on Initial Roughness

A. Judy; T. Curcic; M. V. Ramana Murty; B. H. Cooper; Arthur R. Woll; Joel D. Brock; S. Kycia; Randy L. Headrick

Archive | 1998

Surface Dynamics on Au(111) during Ion Bombardment

M. V. Ramana Murty; A. Judy; B. H. Cooper; Arthur R. Woll; Joel D. Brock; S. Kycia; Randy L. Headrick

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Joel D. Brock

Cornell University

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Arthur R. Woll

Cornell University

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S. Kycia

Cornell University

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A. Judy

Cornell University

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B. H. Cooper

Cornell University

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M. V. Ramana Murty

Cornell University

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Aaron Fleet

Cornell University

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Darren Dale

Cornell University

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E. N. Butler

Cornell University

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Joshua M. Pomeroy

Cornell University

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