504 citations · 2.6k across the 27 of their papers we have counts for
27 papers
Non-linear Faraday Precession of Light Polarization in Time-Reversal Invariant Materials
Falko Pientka, Inti Sodemann Villadiego
We investigate the propagation of electromagnetic waves through materials displaying a non-linear Hall effect. The coupled Maxwell-Boltzmann equations for traveling waves can be ma…
Signatures of Mode-Resolved, Nonlocal Electron-Phonon Coupling in Two-Dimensional Spectroscopy
Sheng Qu, Vishal K. Sharma, Jaco Geuchies +4
Electron-phonon coupling (EPC) is foundational in condensed matter physics, determining intriguing phenomena and properties in both conventional and quantum materials. In this manu…
Collective modes in the charge-density wave state of KMoO: The role of long-range Coulomb interactions revisited
Max O. Hansen, Yash Palan, Viktor Hahn +7
We re-examine the effect of long-range Coulomb interactions on the collective amplitude and phase modes in the incommensurate charge-density-wave ground state of quasi-one-dimensio…
Probing the Quantum Noise of the Spinon Fermi Surface with NV Centers
Jun Yong Khoo, Falko Pientka, Patrick A. Lee +1
We study the transverse electrical conductivity and the corresponding magnetic noise of a two-dimensional U(1) spin liquid state with a spinon Fermi surface. We show that in the qu…
Fermi polaron laser in two-dimensional semiconductors
Tomasz Wasak, Falko Pientka, Francesco Piazza
We study the relaxation dynamics of driven, two-dimensional semiconductors, where itinerant electrons dress optically pumped excitons to form two Fermi-polaron branches. Repulsive…
The universal shear conductivity of Fermi liquids and spinon Fermi surface states and its detection via spin qubit noise magnetometry
Jun Yong Khoo, Falko Pientka, Inti Sodemann
We demonstrate a remarkable property of metallic Fermi liquids: the transverse conductivity assumes a universal value in the quasi-static () limit for wavevectors $…
Van der Waals Heterostructure Magnetic Josephson Junction
H. Idzuchi, F. Pientka, K. -F. Huang +9
When two superconductors are connected across a ferromagnet, the spin configuration of the transferred Cooper pairs can be modulated due to magnetic exchange interaction. The resul…
Topological superconductivity in proximity to type-II superconductors
Alexander Nikolaenko, Falko Pientka
One-dimensional systems proximity-coupled to a superconductor can be driven into a topological superconducting phase by an external magnetic field. Here, we investigate the effect…
Quantum Paracrystalline Shear Modes of the Electron Liquid
Jun Yong Khoo, Po-Yao Chang, Falko Pientka +1
Unlike classical fluids, a quantum Fermi liquid can support a long-lived and propagating shear sound wave at arbitrarily small wave vectors and frequencies, reminiscent of the tran…
Tuning Topological Superconductivity in Phase-Controlled Josephson Junctions with Rashba and Dresselhaus Spin-Orbit Coupling
Benedikt Scharf, Falko Pientka, Hechen Ren +2
Recently, topological superconductors based on Josephson junctions in two-dimensional electron gases with strong Rashba spin-orbit coupling have been proposed as attractive alterna…
Topological Superconductivity in a Phase-Controlled Josephson Junction
Hechen Ren, Falko Pientka, Sean Hart +9
Topological superconductors can support localized Majorana states at their boundaries. These quasi-particle excitations have non-Abelian statistics that can be used to encode and m…
Simulating spin systems with Majorana networks
Alex Thomson, Falko Pientka
With the discovery of Majorana quasiparticles in semiconductor-superconductor hybrid structures, topologically protected qubits have emerged as a promising contender for quantum in…
Transport of neutral optical excitations using electric fields
Ovidiu Cotlet, Falko Pientka, Richard Schmidt +3
Mobile quantum impurities interacting with a fermionic bath form quasiparticles known as Fermi polarons. We demonstrate that a force applied to the bath particles can generate a dr…
Thermal Transport Signatures of Broken-Symmetry Phases in Graphene
Falko Pientka, Jonah Waissman, Philip Kim +1
In the half-filled zero-energy Landau level of bilayer graphene, competing phases with spontaneously broken symmetries and an intriguing quantum critical behavior have been predict…
Topological Superconductivity in a Planar Josephson Junction
Falko Pientka, Anna Keselman, Erez Berg +3
We consider a two-dimensional electron gas with strong spin-orbit coupling contacted by two superconducting leads, forming a Josephson junction. We show that in the presence of an…
Signatures of topological Josephson junctions
Yang Peng, Falko Pientka, Erez Berg +2
Quasiparticle poisoning and diabatic transitions may significantly narrow the window for the experimental observation of the -periodic Josephson effect predicted for topol…
End states and subgap structure in proximity-coupled chains of magnetic adatoms
Michael Ruby, Falko Pientka, Yang Peng +3
A recent experiment [Nadj-Perge et al., Science 346, 602 (2014)] provides evidence for Majorana zero modes in iron (Fe) chains on the superconducting Pb(110) surface. Here, we stud…
Robust Majorana conductance peaks for a superconducting lead
Yang Peng, Falko Pientka, Yuval Vinkler-Aviv +2
Experimental evidence for Majorana bound states largely relies on measurements of the tunneling conductance. While the conductance into a Majorana state is in principle quantized t…
Tunneling processes into localized subgap states in superconductors
Michael Ruby, Falko Pientka, Yang Peng +3
We combine scanning-tunneling-spectroscopy experiments probing magnetic impurities on a superconducting surface with a theoretical analysis of the tunneling processes between (supe…
Shortcuts to nonabelian braiding
Torsten Karzig, Falko Pientka, Gil Refael +1
Topological quantum information processing relies on adiabatic braiding of nonabelian quasiparticles. Performing the braiding operations in finite time introduces transitions out o…
Strong localization of Majorana end states in chains of magnetic adatoms
Yang Peng, Falko Pientka, Leonid I. Glazman +1
A recent experiment [Nadj-Perge et al., Science 346, 602 (2014)] gives possible evidence for Majorana bound states in chains of magnetic adatoms placed on a superconductor. While m…
Unconventional topological phase transitions in helical Shiba chains
Falko Pientka, Leonid I. Glazman, Felix von Oppen
Chains of magnetic impurities placed on a superconducting substrate and forming helical spin order provide a promising venue for realizing a topological superconducting phase. An e…
Topological superconducting phase in helical Shiba chains
Falko Pientka, Leonid I. Glazman, Felix von Oppen
Recently, it has been suggested that topological superconductivity and Majorana end states can be realized in a chain of magnetic impurities on the surface of an s-wave superconduc…
Magneto-Josephson effects and Majorana bound states in quantum wires
Falko Pientka, Liang Jiang, David Pekker +4
A prominent signature of Majorana bound states is the exotic Josephson effects they produce, the classic example being a fractional Josephson current with 4πperiodicity in the phas…