T. Jaouen
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View article: Two-dimensional to bulk crossover of the WSe<sub>2</sub> electronic band structure
Two-dimensional to bulk crossover of the WSe<sub>2</sub> electronic band structure Open
Transition metal dichalcogenides (TMDs) are layered materials obtained by stacking two-dimensional sheets weakly bonded by van der Waals interactions. In bulk TMD, band dispersions are observed in the direction normal to the sheet plane ( …
View article: Bilayer orthogonal ferromagnetism in CrTe2-based van der Waals system
Bilayer orthogonal ferromagnetism in CrTe2-based van der Waals system Open
View article: Photoelectron diffraction of twisted bilayer graphene
Photoelectron diffraction of twisted bilayer graphene Open
View article: Bilayer orthogonal ferromagnetism in CrTe$_2$-based van der Waals system
Bilayer orthogonal ferromagnetism in CrTe$_2$-based van der Waals system Open
Systems with pronounced spin anisotropy play a pivotal role in advancing magnetization switching and spin-wave generation mechanisms, which are fundamental for spintronic technologies. Quasi-van der Waals ferromagnets, particularly Cr$_{1+…
View article: Photoelectron diffraction of twisted bilayer graphene
Photoelectron diffraction of twisted bilayer graphene Open
Photoelectron diffraction (PED) is a powerful spectroscopic technique that combines elemental resolution with a high sensitivity to the local atomic arrangement at crystal surfaces, thus providing unique fingerprints of selected atomic sit…
View article: Pomeranchuk instability from electronic correlations in CsTi$_3$Bi$_5$ kagome metal
Pomeranchuk instability from electronic correlations in CsTi$_3$Bi$_5$ kagome metal Open
Among many-body instabilities in correlated quantum systems, electronic nematicity, defined by the spontaneous breaking of rotational symmetry, has emerged as a critical phenomenon, particularly within high-temperature superconductors. Rec…
View article: Two-dimensional to bulk crossover of the WSe$_2$ electronic band structure
Two-dimensional to bulk crossover of the WSe$_2$ electronic band structure Open
Transition Metal Dichalcogenides (TMD) are layered materials obtained by stacking two-dimensional sheets weakly bonded by van der Waals interactions. In bulk TMD, band dispersions are observed in the direction normal to the sheet plane (z-…
View article: Protection of Ising spin-orbit coupling in bulk misfit superconductors
Protection of Ising spin-orbit coupling in bulk misfit superconductors Open
Ising superconductivity is present due to the combined effect of broken-inversion symmetry and spin-orbit coupling that locks the spins out of plane, features that are associated with two-dimensional materials. We show that bulk misfit sup…
View article: Carrier-Density Control of the Quantum-Confined <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>1</mml:mn><mml:mi>T</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mi>TiSe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> Charge Density Wave
Carrier-Density Control of the Quantum-Confined Charge Density Wave Open
Using angle-resolved photoemission spectroscopy, combined with first principle and coupled self-consistent Poisson-Schrödinger calculations, we demonstrate that potassium (K) atoms adsorbed on the low-temperature phase of 1T-TiSe_{2} induc…
View article: Carrier-Density Control of the Quantum-Confined 1$T$-TiSe$_2$ Charge-Density-Wave
Carrier-Density Control of the Quantum-Confined 1$T$-TiSe$_2$ Charge-Density-Wave Open
Using angle-resolved photoemission spectroscopy, combined with first principle and coupled self-consistent Poisson-Schrödinger calculations, we demonstrate that potassium (K) atoms adsorbed on the low-temperature phase of 1$T$-TiSe$_2$ ind…
View article: Protection of Ising spin-orbit coupling in bulk misfit superconductors
Protection of Ising spin-orbit coupling in bulk misfit superconductors Open
Low-dimensional materials have remarkable properties that are distinct from their bulk counterparts. A paradigmatic example is Ising superconductivity that occurs in monolayer materials such as NbSe2 which show a strong violation of the Pa…
View article: Energy dependence of interference phenomena in the forward-scattering regime of photoelectron diffraction
Energy dependence of interference phenomena in the forward-scattering regime of photoelectron diffraction Open
View article: Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi2B2C
Electron-momentum dependence of electron-phonon coupling underlies dramatic phonon renormalization in YNi2B2C Open
View article: Uniaxial strain-induced phase transition in the 2D topological semimetal IrTe2
Uniaxial strain-induced phase transition in the 2D topological semimetal IrTe2 Open
Strain is ubiquitous in solid-state materials, but despite its fundamental importance and technological relevance, leveraging externally applied strain to gain control over material properties is still in its infancy. In particular, strain…
View article: Ultrafast dynamics of the surface photovoltage in potassium-doped black phosphorus
Ultrafast dynamics of the surface photovoltage in potassium-doped black phosphorus Open
Black phosphorus is a quasi-two-dimensional layered semiconductor with a\nnarrow direct band gap of 0.3 eV. A giant surface Stark effect can be produced\nby the potassium doping of black phosphorus, leading to a semiconductor to\nsemimetal…
View article: Insensitivity of the striped charge orders in IrTe2 to alkali surface doping implies their structural origin
Insensitivity of the striped charge orders in IrTe2 to alkali surface doping implies their structural origin Open
We present a combined angle-resolved photoemission spectroscopy and low-energy electron diffraction (LEED) study of the prominent transition metal dichalcogenide IrTe2 upon potassium (K) deposition on its surface. Pristine IrTe<…
View article: Nature of native atomic defects in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>ZrTe</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:math> and their impact on the low-energy electronic structure
Nature of native atomic defects in and their impact on the low-energy electronic structure Open
Over the past decades, investigations of the anomalous low-energy electronic properties of ZrTe5 have reached a wide array of conclusions. An open question is the growth method's impact on the stoichiometry of ZrTe5 s…
View article: Misfit Layer Compounds: A Platform for Heavily Doped 2D Transition Metal Dichalcogenides
Misfit Layer Compounds: A Platform for Heavily Doped 2D Transition Metal Dichalcogenides Open
Transition metal dichalcogenides (TMDs) display a rich variety of instabilities such as spin and charge orders, Ising superconductivity, and topological properties. Their physical properties can be controlled by doping in electric double‐l…
View article: Nature of native atomic defects in ZrTe$_5$ and their impact on the low-energy electronic structure
Nature of native atomic defects in ZrTe$_5$ and their impact on the low-energy electronic structure Open
Over the past decades, investigations of the anomalous low-energy electronic properties of ZrTe$_5$ have reached a wide array of conclusions. An open question is the growth method's impact on the stoichiometry of ZrTe$_5$ samples, especial…
View article: Carbon‐Assisted Stable Silver Nanostructures
Carbon‐Assisted Stable Silver Nanostructures Open
Nanostructured silver stands out among other plasmonic materials because its optical losses are the lowest of all metals. However, nanostructured silver rapidly degrades under ambient conditions, preventing its direct use in most plasmonic…
View article: Examining the surface phase diagram of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>IrTe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> with photoemission
Examining the surface phase diagram of with photoemission Open
In the transition metal dichalcogenide IrTe2, low-temperature charge-ordered phase transitions involving Ir dimers lead to the occurrence of stripe phases of different periodicities, and nearly degenerate energies. Bulk-sensitiv…
View article: Complete surface phase diagram of IrTe$_2$ revealed by photoemission spectroscopy
Complete surface phase diagram of IrTe$_2$ revealed by photoemission spectroscopy Open
In the transition metal dichalcogenide IrTe$_2$, low-temperature charge-ordered phase transitions lead to the occurrence of stripe phases of different periodicities and nearly degenerate energies. Bulk-sensitive measurements have shown tha…
View article: Unveiling the Semimetallic Nature of 1$T$-TiSe$_2$ by Doping its Charge Density Wave
Unveiling the Semimetallic Nature of 1$T$-TiSe$_2$ by Doping its Charge Density Wave Open
The semimetallic or semiconducting nature of the transition metal dichalcogenide 1$T$-TiSe$_2$ remains under debate after many decades mainly due to the fluctuating nature of its 2 $\times$ 2 $\times$ 2 charge-density-wave (CDW) phase at r…
View article: Phase separation in the vicinity of Fermi surface hot spots
Phase separation in the vicinity of Fermi surface hot spots Open
Spatially inhomogeneous electronic states are expected to be key ingredients for the emergence of superconducting phases in quantum materials hosting charge-density-waves (CDWs). Prototypical materials are transition-metal dichalcogenides …
View article: Semimetal-to-semiconductor transition and charge-density-wave suppression in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>1</mml:mn><mml:mi>T</mml:mi><mml:mo>−</mml:mo><mml:msub><mml:mi>TiSe</mml:mi><mml:mrow><mml:mn>2</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">S</mml:mi><mml:mi>x</mml:mi></mml:msub></mml:mrow></mml:math> single crystals
Semimetal-to-semiconductor transition and charge-density-wave suppression in single crystals Open
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View article: Topological Lifshitz transitions and native quenched disorder in $1T$-TiSe$_2$
Topological Lifshitz transitions and native quenched disorder in $1T$-TiSe$_2$ Open
Spatially inhomogeneous electronic states are expected to be key ingredients for the emergence of superconducting phases in quantum materials hosting charge-density-waves (CDWs). Prototypical materials are transition-metal dichalcogenides …
View article: Local Real-Space View of the Achiral <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>1</mml:mn><mml:mi>T</mml:mi><mml:mtext>−</mml:mtext><mml:msub><mml:mrow><mml:mi>TiSe</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>2</mml:mn><mml:mo>×</mml:mo><mml:mrow><mml:mn>2</mml:mn><mml:mo>×</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:mrow></mml:math> Charge Density Wave
Local Real-Space View of the Achiral Charge Density Wave Open
The transition metal dichalcogenide 1T-TiSe_{2}-two-dimensional layered material undergoing a commensurate 2×2×2 charge density wave (CDW) transition with a weak periodic lattice distortion (PLD) below ≈200 K. Scanning tunneling microscopy…
View article: Robustness of the charge-ordered phases in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>IrTe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> against photoexcitation
Robustness of the charge-ordered phases in against photoexcitation Open
We present a time-resolved angle-resolved photoelectron spectroscopy study of\nIrTe$_2$, which undergoes two first-order structural and charge-ordered phase\ntransitions on cooling below 270 K and below 180 K. The possibility of inducing\n…
View article: A Ga-doped SnO<sub>2</sub> mesoporous contact for UV stable highly efficient perovskite solar cells
A Ga-doped SnO<sub>2</sub> mesoporous contact for UV stable highly efficient perovskite solar cells Open
Increasing the stability of perovskite solar cells is a major challenge for commercialization.
View article: Selective Probing of Hidden Spin-Polarized States in Inversion-Symmetric Bulk <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>MoS</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
Selective Probing of Hidden Spin-Polarized States in Inversion-Symmetric Bulk Open
Spin- and angle-resolved photoemission spectroscopy is used to reveal that a large spin polarization is observable in the bulk centrosymmetric transition metal dichalcogenide MoS_{2}. It is found that the measured spin polarization can be …