Bulletin of the American Physical Society
APS March Meeting 2010
Volume 55, Number 2
Monday–Friday, March 15–19, 2010; Portland, Oregon
Session H40: Focus Session: Phonons and Electron Correlations in High Temperature Superconductors II
8:00 AM–10:36 AM,
Tuesday, March 16, 2010
Sponsoring Unit: DCMP
Chair: David Parker, Naval Research Laboratory
Abstract ID: BAPS.2010.MAR.H40.3
Abstract: H40.00003 : Detecting the Majorana fermion surface state of $^3$He-B through spin relaxation*
8:48 AM–9:00 AM
Preview Abstract Abstract
Suk Bum Chung
The concept of the Majorana fermion has been postulated more than eighty years ago; however, this elusive particle has never been observed in nature. The non-local character of the Majorana fermion can be useful for topological quantum computation. Recently, it has been shown that the 3He-B phase is a time-reversal invariant topological superfluid, with a single component of gapless Majorana fermion state localized on the surface. Such a Majorana surface state contains half the degrees of freedom of the single Dirac surface state recently observed in topological insulators. We show here that the Majorana surface state can be detected through an electron spin relaxation experiment. The Majorana nature of the surface state can be revealed though the striking angular dependence of the relaxation time on the magnetic field direction, $1/T_1 \propto sin^2 \theta$ where $\theta$ is the angle between the magnetic field and the surface normal. The temperature dependence of the spin relaxation rate can reveal the gapless linear dispersion of the Majorana surface state. We propose a spin relaxation experiment setup where we inject an electron inside a nano- sized bubble below the helium liquid surface.
*This work is supported by DOE under contract DE-AC02-76SF00515 and Stanford ITP.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.H40.3
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700