Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
Name
Cheuk-2012-Spin-injection spectroscopy of a spin-orbit coupled Fermi gas.pdf
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1.99 MB
Format
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Checksum (MD5)
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Author(s)
Cheuk, Lawrence W.
Sommer, Ariel Tjodolv
Hadzibabic, Zoran
Yefsah, Tarik
Zwierlein, Martin Wolfram
Bakr, Waseem S
Date Issued
August 2012
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Cheuk, Lawrence et al. “Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas.” Physical Review Letters 109.9 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
The coupling of the spin of electrons to their motional state lies at the heart of recently discovered topological phases of matter. Here we create and detect spin-orbit coupling in an atomic Fermi gas, a highly controllable form of quantum degenerate matter. We directly reveal the spin-orbit gap via spin-injection spectroscopy, which characterizes the energy-momentum dispersion and spin composition of the quantum states. For energies within the spin-orbit gap, the system acts as a spin diode. We also create a spin-orbit coupled lattice and probe its spinful band structure, which features additional spin gaps and a fully gapped spectrum. In the presence of s-wave interactions, such systems should display induced p-wave pairing, topological superfluidity, and Majorana edge states.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
MIT-Harvard Center for Ultracold Atoms
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.109.095302
