Single Impurity In Ultracold Fermi Superfluids
arXiv:1010.3222 · doi:10.1103/PhysRevA.83.061604
Abstract
The role of impurities as experimental probes in the detection of quantum material properties is well appreciated. Here we study the effect of a single classical magnetic impurity in trapped ultracold Fermi superfluids. Depending on its shape and strength, a magnetic impurity can induce single or multiple mid-gap bound states in a superfluid Fermi gas. The multiple mid-gap states could coincide with the development of a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase within the superfluid. As an analog of the Scanning Tunneling Microscope, we propose a modified RF spectroscopic method to measure the local density of states which can be employed to detect these states and other quantum phases of cold atoms. A key result of our self consistent Bogoliubov-de Gennes calculations is that a magnetic impurity can controllably induce an FFLO state at currently accessible experimental parameters.
5 pages, 3 figures; added calculations for 3D
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- Rashba spin-orbit coupled atomic Fermi gases
- Universal impurity-induced bound state in topological superfluids
- Weyl Superfluidity in a Three-dimensional Dipolar Fermi Gas
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- Soliton-induced Majorana fermions in a one-dimensional atomic topological superfluid
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- Topological Quantum Phase Transition in Synthetic Non-Abelian Gauge Potential
- Crossover polarons in a strongly interacting Fermi superfluid
- Impurity probe of topological superfluid in one-dimensional spin-orbit coupled atomic Fermi gases
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- Quantum Dot at a Luttinger liquid edge
- Emergent QCD Kondo effect in two-flavor color superconducting phase
- Particle number fractionalization of a one-dimensional atomic Fermi gas with synthetic spin-orbit coupling
- Spin-orbit-coupled topological Fulde-Ferrell states of fermions in a harmonic trap
- Spin Mixing in Spinor Fermi Gases
- Majorana Doublets, Flat Bands, and Dirac Nodes in s-Wave Superfluids
- Interplay of Superconductivity and Spin-Dependent Disorder
- Quantum Dot in Interacting Environments
- Edge modes and boundary impurities in the anisotropic Heisenberg spin chain
- Interaction-induced localization of mobile impurities in ultracold systems
- From Nodal Ring Topological Superfluids to Spiral Majorana Modes in Cold Atomic Systems
- Interaction-induced localization of fermionic mobile impurities in a Larkin-Ovchinnikov superfluid
- Magnetic Impurities in Two-Dimensional Superfluid Fermi Gas with Spin-Orbit Coupling
- Tuning Dissipation and Excitations in Superfluid Fermi Gases with a Moving Impurity
- Phase tunable Josephson junction and spontaneous mass current in a spin-orbit coupled Fermi superfluid
- Many-body critical phase in a quasiperiodic chain and dynamical Widom lines in Fock space properties
- Andreev bound states at boundaries of polarized 2D Fermi superfluids with s-wave pairing and spin-orbit coupling
- Engineering Majorana Kramers Pairs In Synthetic High Spin Chern Insulators
- Structures and proximity effects of inhomogeneous population-imbalanced Fermi gases with pairing interactions
- Tunable nanomagnetism in moderately cold fermions on optical lattices