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Wednesday, August 13 • 10:20 - 12:20
Spintronics & Spin Phenomena V

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10:20-10:50

Invited: Gregory Fuchs
Driving Diamond Nitrogen-Vacancy Center Spin Resonance with Mechanical Motion
Co-authors: Evan MacQuarrie, Tanay Gosavi, Sunil Bhave, Nicholas Jungwirth

We demonstrate direct mechanical driving of diamond nitrogen-vacancy (NV) center spins without mediation by a magnetic driving field [1]. Using a bulk-mode acoustic resonator fabricated from single crystal diamond, we exert 7 MPa of non-axial ac stress on NV centers positioned at an antinode of the 1 GHz mechanical mode. When we tune the ms = -1 to +1 spin state splitting energy into resonance with the mechanical frequency, we observe direct Δms = ±2 spin transitions, which are forbidden by the magnetic dipole selection rule. To rule out stray electric and magnetic fields as the origin of the spin transitions, we study the spin signal as a function depth within the diamond resonator. We find that the spin signal reproduces the periodicity of the mechanical standing wave, confirming a mechanical origin to the spin driving. This work demonstrates direct coupling between NV center spins and resonator phonons, which has potential for high frequency strain sensing, fundamental research into spin-phonon interactions at the nanoscale, and as a potential platform for hybrid spin-mechanical quantum systems.

[1] E. R. MacQuarrie, T. A. Gosavi, N. R. Jungwirth, S. A. Bhave, and G. D. Fuchs, Phys. Rev. Lett. 111, 227602 (2013).

10:50-11:05
Oral: Vincent Sacksteder
Hole Spin Helix: Anomalous Spin Diffusion in Anisotropic Strained Hole Quantum Wells
Co-authors: Andrei Bernevig

11:05-11:20
Oral: Ceyhun Bulutay
Nuclear Spin Environment in Strained InGaAs Quantum Dots
Co-authors: E. A. Chekhovich, A. I. Tartakovskii

11:20-11:35
Oral: Joerg Debus
Magneto-Optical Effects of Nitrogen Vacancies in Diamond
Co-authors: V. Yu. Ivanov, D. Braukmann, D. Dunker, V. L. Korenev, D. R. Yakovlev, M. BayerM. Godlewski

11:35-11:50
Oral: Juliana Marques Ramos
Hyperfine Parameters in Pure Fe-Doped TiO2
Co-authors: Reiner Vianden, Artur Wilson Carbonari, Thiago Martucci

11:50-12:05
Oral: M. A. Meeker
Time Resolved Magneto-Optical Studies of InAsP Alloys
Co-authors: B. A. Magill, T. R. Merritt, G. A. Khodaparast, S. McGill, J.G. Tischler, C. J. PalmstrØm

12:05-12:20
Oral: Anton Konakov
Influence of the Spin-Orbit Coupling on the Electronic Structure & Relaxation Processes in Silicon Nanocrystals 
Co-authors: Vladimir Belyakov, Kirill Sidorenko, Natalia Kurova, Vladimir Burdov 

Session Chairs
HD

Hanan Dery

Associate Professor of Electrical & Computer Engineering, University of Rochester
Hanan Dery, a specialist in the emerging field of spintronics, joined the Department of ECE in July, 2007. Previously, he was a Postdoctoral Associate in Lu Sham's group in the Department of Physics, University of California San Diego (UCSD). During this time, he worked on spintronics, seeking ways to integrate information based on electron spin into semiconductors. Dery earned his PhD in Electrical Engineering from Technion-Israel Institute of... Read More →

Speakers
GF

Greg Fuchs

Assistant Professor & Rebecca Q. & James C. Morgan Sesquicentennial Faculty Fellow, Cornell University
Fuchs earned his Ph.D. from Cornell University in 2007. Afterward, he moved to the University of California, Santa Barbara as a postdoctoral associate. In 2011, he joined the Cornell faculty of Applied and Engineering Physics. In 2012 he received a Young Investigator Award from the Air Force Office of Scientific Research, and in 2013 he received an Early Faculty Career Award from the National Science Foundation and the Presidential Early Career... Read More →


Wednesday August 13, 2014 10:20 - 12:20
Room 18CD

Attendees (11)