Role of hydrogen in hydrogen-induced layer exfoliation of germanium

J. M. Zahler,1 A. Fontcuberta i Morral,1,2 M. J. Griggs,1 Harry A. Atwater,1 and Y. J. Chabal3 1Thomas J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, California 91125, USA 2Walter Schottky Institut, Technische Universität München, 85748 Garching, Germany 3Laboratory for Surface Modification, Rutgers University, Piscataway, New Jersey 08854, USA Received 3 August 2006; revised manuscript received 12 November 2006; published 9 January 2007