Personne
Maja Deborah Bachmann
Cette personne n’est plus à l’EPFL
Publications associées (16)
Crossing the ballistic-ohmic transition via high energy electron irradiation
Philip Johannes Walter Moll, Maja Deborah Bachmann, Matthias Carsten Putzke
The delafossite metal PtCoO2 is among the highest-purity materials known, with low-temperature mean free path up to 5 mu m in the best as-grown single crystals. It exhibits a strongly faceted, nearly hexagonal Fermi surface. This property has profound cons ...
AMER PHYSICAL SOC2023Layered metals as polarized transparent conductors
Philip Johannes Walter Moll, Maja Deborah Bachmann, Matthias Carsten Putzke, Chunyu Guo
The quest to improve transparent conductors balances two key goals: increasing electrical conductivity and increasing optical transparency. To improve both simultaneously is hindered by the physical limitation that good metals with high electrical conducti ...
NATURE PORTFOLIO2023Controlling superconductivity of CeIrIn5 microstructures by substrate selection
Philip Johannes Walter Moll, Maja Deborah Bachmann, Matthias Carsten Putzke, Chunyu Guo, Maarten Ruud van Delft, Joshua Alan Wolfe Straquadine
Superconductor/metal interfaces are usually fabricated in heterostructures that join these dissimilar materials. A conceptually different approach has recently exploited the strain sensitivity of heavy-fermion superconductors, selectively transforming regi ...
AIP Publishing2022Scanning SQUID microscopy in a cryogen-free dilution refrigerator
Philip Johannes Walter Moll, Maja Deborah Bachmann
We report a scanning superconducting quantum interference device (SQUID) microscope in a cryogen-free dilution refrigerator with a base temperature at the sample stage of at least 30 mK. The microscope is rigidly mounted to the mixing chamber plate to opti ...
2021Scale-invariant magnetic anisotropy in RuCl(3)at high magnetic fields
Philip Johannes Walter Moll, Maja Deborah Bachmann
Scale-invariant magnetic anisotropy in RuCl(3)has been revealed through measurements of its magnetotropic coefficient, providing evidence for a high degree of exchange frustration that favours the formation of a spin liquid state. In RuCl3, inelastic neutr ...
2020h/e oscillations in interlayer transport of delafossites
Philip Johannes Walter Moll, Maja Deborah Bachmann, Matthias Carsten Putzke
Microstructures can be carefully designed to reveal the quantum phase of the wave-like nature of electrons in a metal. Here, we report phase-coherent oscillations of out-of-plane magnetoresistance in the layered delafossites PdCoO2 and PtCoO2. The oscillat ...
2020Orbital effect and weak localization in the longitudinal magnetoresistance of Weyl semimetals NbP, NbAs, TaP, and TaAs
Philip Johannes Walter Moll, Maja Deborah Bachmann
Weyl semimetals such as the TaAs family (TaAs, TaP, NbAs, NbP) host quasiparticle excitations resemblingthe long-sought-after Weyl fermions at special band-crossing points in the band structure denoted as Weylnodes. They are predicted to exhibit a negative ...
2020Out-of-plane transport in ZrSiS and ZrSiSe microstructures
Philip Johannes Walter Moll, Maja Deborah Bachmann, Kent Robert Shirer
A recent class of topological nodal-line semimetals with the general formula MSiX (M = Zr, Hf and X = S, Se, Te) has attracted much experimental and theoretical interest due to their properties, particularly their large magnetoresistances and high carrier ...
2019Super-geometric electron focusing on the hexagonal Fermi surface of PdCoO2
Philip Johannes Walter Moll, Maja Deborah Bachmann, Matthias Carsten Putzke
Geometric electron optics may be implemented in solids when electron transport is ballistic on the length scale of a device. Currently, this is realized mainly in 2D materials characterized by circular Fermi surfaces. Here we demonstrate that the nearly pe ...
2019Persistent antiferromagnetic order in heavily overdoped Ca1-xLaxFeAs2
László Forró, Henrik Moodysson Rønnow, Ivica Zivkovic, Philip Johannes Walter Moll, Ana Akrap, Sergiy Katrych, Maja Deborah Bachmann, Edoardo Martino
In the Ca1-xLaxFeAs2 (1 1 2) family of pnictide superconductors, we have investigated a highly overdoped composition (x = 0.56), prepared by a high-pressure, high-temperature synthesis. Magnetic measurements show an antiferromagnetic transition at T-N = 12 ...
2019