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Publications (45)

cond-mat.other2007

Unveiling new systematics in the self-assembly of atomic chains on Si(111)

C. Battaglia, H. Cercellier, C. Monney +3

Self-assembled arrays of atomic chains on Si(111) represent a fascinating family of nanostructures with quasi-one-dimensional electronic properties. These surface reconstructions a…

cond-mat.str-el2013

Chiral charge order in 1 $T$ -TiSe $_{2}$ : importance of lattice degrees of freedom

B. Zenker, H. Fehske, H. Beck +2

We address the question of the origin of the recently discovered chiral property of the charge-density-wave phase in 1 $T$ -TiSe $_{2}$ which so far lacks a microscopic understanding. W…

cond-mat.str-el2008

Spontaneous exciton condensation in 1T-TiSe2: a BCS-like approach

C. Monney, H. Cercellier, F. Clerc +9

Recently strong evidence has been found in favor of a BCS-like condensation of excitons in 1\textit{T}-TiSe $_{2}$ . Theoretical photoemission intensity maps have been generated by the…

cond-mat.supr-con2011

Intense paramagnon excitations in a large family of high-temperature superconductors

M. Le Tacon, G. Ghiringhelli, J. Chaloupka +17

In the search for the mechanism of high-temperature superconductivity, intense research has been focused on the evolution of the spin excitation spectrum upon doping from the antif…

cond-mat.str-el2025

Floquet topological state induced by light-driven band inversion in SnTe

F. Chassot, G. Kremer, A. Pulkkinen +7

High intensity coherent light can dress matter, realizing new hybrid phases that are not accessible in equilibrium. This effect results from the coherent interaction between Bloch…

cond-mat.str-el2013

High-energy magnetic excitations in Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + I^´}$ : Towards a unified description of the electronic and magnetic degrees of freedom in the cuprates

M. P. M. Dean, A. J. A. James, R. S. Springell +10

We investigate the high-energy magnetic excitation spectrum of the high- $T_{c}$ cuprate superconductor Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + I^´}$ (Bi-2212) using Cu $L_{3}$ edge resonant inelastic…

cond-mat.str-el2012

Spin excitations in a single La $_{2}$ CuO $_{4}$ layer

M. P. M. Dean, R. S. Springell, C. Monney +9

The dynamics of S=1/2 quantum spins on a 2D square lattice lie at the heart of the mystery of the cuprates \cite{Hayden2004,Vignolle2007,Li2010,LeTacon2011,Coldea2001,Headings2010,…

cond-mat.str-el2021

Observation of a uniaxial strain-induced phase transition in the 2D topological semimetal IrTe $_{2}$

C. W. Nicholson, M. Rumo, A. Pulkkinen +12

Strain is ubiquitous in solid-state materials, but despite its fundamental importance and technological relevance, leveraging externally applied strain to gain control over materia…

cond-mat.supr-con2013

Persistent high-energy spin excitations in iron pnictide superconductors

K. J. Zhou, Y. B. Huang, C. Monney +10

Motivated by the premise that superconductivity in iron-based superconductors is unconventional and mediated by spin fluctuations, an intense research effort has been focused on ch…

cond-mat.str-el2009

Dramatic effective mass reduction driven by strong electronic correlations

C. Monney, E. F. Schwier, M. G. Garnier +9

We present angle-resolved photoemission experiments on 1T-TiSe2 at temperatures ranging from 13K to 288K. The data evidence a dramatic renormalization of the conduction band below…

cond-mat.other2010

Influence of elastic scattering on the measurement of core-level binding energy dispersion in x-ray photoemission spectroscopy

E. F. Schwier, C. Monney, N. Mariotti +5

In the light of recent measurements of the C 1s core level dispersion in graphene [Nat. Phys. 6, 345 (2010)], we explore the interplay between the elastic scattering of photoelectr…

cond-mat.mtrl-sci2021

Ultrafast Dynamics of the Surface Photovoltage in Potassium Doped Black Phosphorus

G. Kremer, M. Rumo, C. Yue +6

Black phosphorus is a quasi-two-dimensional layered semiconductor with a narrow direct band gap of 0.3 eV. A giant surface Stark effect can be produced by the potassium doping of b…

cond-mat.str-el2015

Impact of Electron-Hole Correlations on the 1T-TiSe2 Electronic Structure

G. Monney, C. Monney, B. Hildebrand +2

Several experiments have been performed on 1T-TiSe2 in order to identify whether the electronic structure is semimetallic or semiconducting without reaching a consensus. In this pa…

cond-mat.str-el2019

Unveiling the Semimetallic Nature of 1 $T$ -TiSe $_{2}$ by Doping its Charge Density Wave

T. Jaouen, M. Rumo, B. Hildebrand +10

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…

cond-mat.str-el2007

Evidence for an excitonic insulator phase in 1T-TiSe $_{2}$

H. Cercellier, C. Monney, F. Clerc +7

We present a new high-resolution angle-resolved photoemission study of 1\textit{T}-TiSe $_{2}$ in both, its room-temperature, normal phase and its low-temperature, charge-density wa…

cond-mat.mtrl-sci2020

Nature of native atomic defects in ZrTe $_{5}$ and their impact on the low-energy electronic structure

B. Salzmann, A. Pulkkinen, B. Hildebrand +9

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'…

cond-mat.str-el2016

Revealing the role of electrons and phonons in the ultrafast recovery of charge density wave correlations in 1 $T$ -TiSe $_{2}$

C. Monney, M. Puppin, C. W. Nicholson +8

Using time- and angle-resolved photoemission spectroscopy with selective near- and mid-infrared photon excitations, we investigate the femtosecond dynamics of the charge density wa…

cond-mat.str-el2011

Many-body effects in TiSe2: Can GW describe an Excitonic Insulator?

M. Cazzaniga, H. Cercellier, M. Holzmann +4

We present both theoretical ab initio GW and experimental angle-resolved photoemission (ARPES) and scanning tunneling (STS) spectroscopy results on TiSe2. With respect to the densi…

cond-mat.mtrl-sci2024

Bonding states underpinning structural transitions in IrTe $_{2}$ observed with micro-ARPES

C. W. Nicholson, M. D. Watson, A. Pulkkinen +6

Competing interactions in low-dimensional materials can produce nearly degenerate electronic and structural phases. We investigate the staircase of structural phase transitions in…

cond-mat.str-el2021

Insensitivity of the striped charge-orders in IrTe $_{2}$ to alkali surface doping implies their structural origin

M. Rumo, A. Pulkkinen, B. Salzmann +7

We present a combined angle-resolved photoemission spectroscopy and low-energy electron diffraction (LEED) study of the prominent transition metal dichalcogenide IrTe $_{2}$ upon pota…

cond-mat.supr-con2016

A resonant inelastic x-ray scattering study of the spin and charge excitations in the overdoped superconductor La1.77Sr0.23CuO4

C. Monney, T. Schmitt, C. E. Matt +5

We present a resonant inelastic x-ray scattering (RIXS) study of spin and charge excitations in overdoped La1.77Sr0.23CuO4 along two high-symmetry directions. The line shape of the…

cond-mat.other2006

Stabilization of silicon honeycomb chains by trivalent adsorbates

C. Battaglia, H. Cercellier, C. Monney +2

The atomic structure of self-assembled quasi-one-dimensional Gd chains on Si(111) has been investigated by low-energy electron diffraction and scanning tunneling microscopy. Based…

cond-mat.str-el2021

Probing the interplay between lattice dynamics and short-range magnetic correlations in CuGeO3 with femtosecond RIXS

E. Paris, C. W. Nicholson, S. Johnston +13

Investigations of magnetically ordered phases on the femtosecond timescale have provided significant insights into the influence of charge and lattice degrees of freedom on the mag…

physics.ins-det2019

Time- and angle-resolved photoemission spectroscopy of solids in the extreme ultraviolet at 500 kHz repetition rate

M. Puppin, Y. Deng, C. W. Nicholson +8

Time- and angle-resolved photoelectron spectroscopy (trARPES) employing a 500 kHz extreme-ultravioled (XUV) light source operating at 21.7 eV probe photon energy is reported. Based…

cond-mat.str-el2020

Mapping the unoccupied state dispersions in Ta $_{2}$ NiSe $_{5}$ with resonant inelastic x-ray scattering

C. Monney, M. Herzog, A. Pulkkinen +8

The transition metal chalcogenide Ta $_{2}$ NiSe $_{5}$ undergoes a second-order phase transition at $T_{c} = 328$ K involving a small lattice distortion. Below $T_{c}$ , a band gap at the cente…

cond-mat.str-el2020

Ultrafast spin density wave transition in Chromium governed by thermalized electron gas

C. W. Nicholson, C. Monney, R. Carley +4

The energy and momentum selectivity of time- and angle-resolved photoemission spectroscopy is exploited to address the ultrafast dynamics of the antiferromagnetic spin density wave…

cond-mat.str-el2025

Ultrafast recovery dynamics of dimer stripes in IrTe2

M. Rumo, G. Kremer, M. Heber +10

The transition metal dichalcogenide IrTe2 displays a remarkable series of first-order phase transitions below room temperature, involving lattice displacements as large as 20 perce…

cond-mat.str-el2007

Non-uniform doping across the Fermi surface of NbS $_{2}$ intercalates

C. Battaglia, H. Cercellier, L. Despont +6

Magnetic ordering of the first row transition metal intercalates of NbS $_{2}$ due to coupling between the conduction electrons and the intercalated ions has been explained in terms o…

cond-mat.mtrl-sci2021

Excited-state band structure mapping

M. Puppin, C. W. Nicholson, C. Monney +10

Angle-resolved photoelectron spectroscopy is an extremely powerful probe of materials to access the occupied electronic structure with energy and momentum resolution. However, it r…

cond-mat.str-el2020

Examining the surface phase diagram of IrTe $_{2}$ with photoemission

M. Rumo, C. W. Nicholson, A. Pulkkinen +13

In the transition metal dichalcogenide IrTe $_{2}$ , low-temperature charge-ordered phase transitions involving Ir dimers lead to the occurrence of stripe phases of different periodici…

cond-mat.str-el2018

Comment on `Oxygen vacancy-induced magnetic moment in edge-sharing CuO $_{2}$ chains of Li $_{2}$ CuO $_{2}$ '

R. O. Kuzian, R. Klingeler, W. E. A. Lorenz +23

In a recent work devoted to the magnetism of Li $_{2}$ CuO $_{2}$ , Shu et al. [New J. Phys. 19 (2017) 023026] have proposed a "simplified" unfrustrated microscopic model that differs…

cond-mat.supr-con2016

Multiband one-dimensional electronic structure and spectroscopic signature of Tomonoga-Luttinger liquid behavior in K $_{2}$ Cr $_{3}$ As $_{3}$

M. D. Watson, Y. Feng, C. W. Nicholson +8

We present Angle-Resolved Photoemission Spectroscopy measurements of the quasi-one dimensional superconductor K $_{2}$ Cr $_{3}$ As $_{3}$ . We find that the Fermi surface contains two Fermi s…

cond-mat.mtrl-sci2022

Evolution of the SrTiO $_{3}$ surface electronic state as a function of LaAlO $_{3}$ overlayer thickness

N. C. Plumb, M. Kobayashi, M. Salluzzo +10

The novel electronic properties emerging at interfaces between transition metal oxides, and in particular the discovery of conductivity in heterostructures composed of LaAlO $_{3}$ (L…

cond-mat.str-el2008

Temperature dependence of the excitonic insulator phase model in 1T-TiSe2

C. Monney, H. Cercellier, F. Clerc +6

Recently, detailed calculations of the excitonic insulator phase model adapted to the case of 1\textit{T}-TiSe $_{2}$ have been presented. Through the spectral function theoretical ph…

cond-mat.mtrl-sci2023

Carrier-Density Control of the Quantum-Confined 1 $T$ -TiSe $_{2}$ Charge-Density-Wave

T. Jaouen, A. Pulkkinen, M. Rumo +9

Using angle-resolved photoemission spectroscopy, combined with first principle and coupled self-consistent Poisson-SchrÃ¶dinger calculations, we demonstrate that potassium (K) atom…

cond-mat.mtrl-sci2018

Semimetal-to-semiconductor transition and charge-density-wave melting in $1 T$ -TiSe $_{2 - x}$ S $_{x}$ single crystals

M. -L. Mottas, T. Jaouen, B. Hildebrand +9

The transition metal dichalcogenide $1 T$ -TiSe $_{2}$ is a quasi-two-dimensional layered material with a phase transition towards a commensurate charge density wave (CDW) at a critical…

cond-mat.supr-con2017

Damped spin excitations in a doped cuprate superconductor with orbital hybridization

O. Ivashko, N. E. Shaik, X. Lu +13

A resonant inelastic x-ray scattering (RIXS) study of overdamped spin-excitations in slightly underdoped La $_{2 - x}$ Sr $_{x}$ CuO $_{4}$ (LSCO) with $x = 0.12$ and $0.145$ is presented. Th…

cond-mat.str-el2012

Spin-Orbital Separation in the quasi 1D Mott-insulator Sr2CuO3

J. Schlappa, K. Wohlfeld, K. J. Zhou +13

As an elementary particle the electron carries spin \hbar/2 and charge e. When binding to the atomic nucleus it also acquires an angular momentum quantum number corresponding to th…

cond-mat.mtrl-sci2019

Phase Separation in the Vicinity of Fermi Surface Hot Spots

T. Jaouen, B. Hildebrand, M. -L. Mottas +12

Spatially inhomogeneous electronic states are expected to be key ingredients for the emergence of superconducting phases in quantum materials hosting charge-density-waves (CDWs). P…

cond-mat.str-el2018

Robustness of the charge-ordered phases in IrTe $_{2}$ against photoexcitation

C. Monney, A. Schuler, T. Jaouen +8

We present a time-resolved angle-resolved photoelectron spectroscopy study of IrTe $_{2}$ , which undergoes two first-order structural and charge-ordered phase transitions on cooling b…

cond-mat.str-el2009

Temperature dependent photoemission on 1T-TiSe2: Interpretation within the exciton condensate phase model

C. Monney, E. F. Schwier, C. Battaglia +9

The charge density wave phase transition of 1T-TiSe2 is studied by angle-resolved photoemission over a wide temperature range. An important chemical potential shift which strongly…

cond-mat.str-el2013

Charge-orbital-lattice coupling effects in the dd-excitation profile of one dimensional cuprates

J. J. Lee, B. Moritz, W. S. Lee +12

We identify dd-excitations in the quasi-one dimensional compound Ca $_{2}$ Y $_{2}$ Cu $_{5}$ O $_{10}$ using resonant inelastic x-ray scattering. By tuning across the Cu L $_{3}$ -edge, we observe…

cond-mat.mtrl-sci2020

Unveiling the complete dispersion of the giant Rashba split surface states of ferroelectric $I^\pm$ -GeTe(111) by alkali doping

G. Kremer, T. Jaouen, B. Salzmann +9

$I^\pm$ -GeTe(111) is a non-centrosymmetric ferroelectric material, for which a strong spin-orbit interaction gives rise to giant Rashba split states in the bulk and at the surface. Th…

cond-mat.str-el2010

Exciton condensation driving the periodic lattice distortion of 1T-TiSe2

C. Monney, C. Battaglia, H. Cercellier +2

We address the lattice instability of 1T-TiSe2 in the framework of the exciton condensate phase. We show that, at low temperature, condensed excitons influence the lattice through…

cond-mat.mtrl-sci2014

Inelastic X-ray scattering from valence electrons near absorption edges of FeTe and TiSe $_{2}$

B. Barbiellini, J. N. Hancock, C. Monney +4

We study resonant inelastic x-ray scattering (RIXS) peaks corresponding to low energy particle-hole excited states of metallic FeTe and semi-metallic TiSe $_{2}$ for photon incident e…

Publications (45)

Unveiling new systematics in the self-assembly of atomic chains on Si(111)

Chiral charge order in 1T-TiSe2​: importance of lattice degrees of freedom

Spontaneous exciton condensation in 1T-TiSe2: a BCS-like approach

Intense paramagnon excitations in a large family of high-temperature superconductors

Floquet topological state induced by light-driven band inversion in SnTe

High-energy magnetic excitations in Bi2​Sr2​CaCu2​O8+I^´​: Towards a unified description of the electronic and magnetic degrees of freedom in the cuprates

Spin excitations in a single La2​CuO4​ layer

Observation of a uniaxial strain-induced phase transition in the 2D topological semimetal IrTe2​

Persistent high-energy spin excitations in iron pnictide superconductors

Dramatic effective mass reduction driven by strong electronic correlations

Influence of elastic scattering on the measurement of core-level binding energy dispersion in x-ray photoemission spectroscopy

Ultrafast Dynamics of the Surface Photovoltage in Potassium Doped Black Phosphorus

Impact of Electron-Hole Correlations on the 1T-TiSe2 Electronic Structure

Unveiling the Semimetallic Nature of 1T-TiSe2​ by Doping its Charge Density Wave

Evidence for an excitonic insulator phase in 1T-TiSe2​

Nature of native atomic defects in ZrTe5​ and their impact on the low-energy electronic structure

Revealing the role of electrons and phonons in the ultrafast recovery of charge density wave correlations in 1T-TiSe2​

Many-body effects in TiSe2: Can GW describe an Excitonic Insulator?

Bonding states underpinning structural transitions in IrTe2​ observed with micro-ARPES

Insensitivity of the striped charge-orders in IrTe2​ to alkali surface doping implies their structural origin

A resonant inelastic x-ray scattering study of the spin and charge excitations in the overdoped superconductor La1.77Sr0.23CuO4

Stabilization of silicon honeycomb chains by trivalent adsorbates

Probing the interplay between lattice dynamics and short-range magnetic correlations in CuGeO3 with femtosecond RIXS

Time- and angle-resolved photoemission spectroscopy of solids in the extreme ultraviolet at 500 kHz repetition rate

Mapping the unoccupied state dispersions in Ta2​NiSe5​ with resonant inelastic x-ray scattering

Ultrafast spin density wave transition in Chromium governed by thermalized electron gas

Ultrafast recovery dynamics of dimer stripes in IrTe2

Non-uniform doping across the Fermi surface of NbS2​ intercalates

Excited-state band structure mapping

Examining the surface phase diagram of IrTe2​ with photoemission

Comment on `Oxygen vacancy-induced magnetic moment in edge-sharing CuO2​ chains of Li2​CuO2​'

Multiband one-dimensional electronic structure and spectroscopic signature of Tomonoga-Luttinger liquid behavior in K2​Cr3​As3​

Evolution of the SrTiO3​ surface electronic state as a function of LaAlO3​ overlayer thickness

Temperature dependence of the excitonic insulator phase model in 1T-TiSe2

Carrier-Density Control of the Quantum-Confined 1T-TiSe2​ Charge-Density-Wave

Semimetal-to-semiconductor transition and charge-density-wave melting in 1T-TiSe2−x​Sx​ single crystals

Damped spin excitations in a doped cuprate superconductor with orbital hybridization

Spin-Orbital Separation in the quasi 1D Mott-insulator Sr2CuO3

Phase Separation in the Vicinity of Fermi Surface Hot Spots

Robustness of the charge-ordered phases in IrTe2​ against photoexcitation

Temperature dependent photoemission on 1T-TiSe2: Interpretation within the exciton condensate phase model

Charge-orbital-lattice coupling effects in the dd-excitation profile of one dimensional cuprates

Unveiling the complete dispersion of the giant Rashba split surface states of ferroelectric I^±-GeTe(111) by alkali doping

Exciton condensation driving the periodic lattice distortion of 1T-TiSe2

Inelastic X-ray scattering from valence electrons near absorption edges of FeTe and TiSe2​

Chiral charge order in 1 $T$ -TiSe $_{2}$ : importance of lattice degrees of freedom

High-energy magnetic excitations in Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + I^´}$ : Towards a unified description of the electronic and magnetic degrees of freedom in the cuprates

Spin excitations in a single La $_{2}$ CuO $_{4}$ layer

Observation of a uniaxial strain-induced phase transition in the 2D topological semimetal IrTe $_{2}$

Unveiling the Semimetallic Nature of 1 $T$ -TiSe $_{2}$ by Doping its Charge Density Wave

Evidence for an excitonic insulator phase in 1T-TiSe $_{2}$

Nature of native atomic defects in ZrTe $_{5}$ and their impact on the low-energy electronic structure

Revealing the role of electrons and phonons in the ultrafast recovery of charge density wave correlations in 1 $T$ -TiSe $_{2}$

Bonding states underpinning structural transitions in IrTe $_{2}$ observed with micro-ARPES

Insensitivity of the striped charge-orders in IrTe $_{2}$ to alkali surface doping implies their structural origin

Mapping the unoccupied state dispersions in Ta $_{2}$ NiSe $_{5}$ with resonant inelastic x-ray scattering

Non-uniform doping across the Fermi surface of NbS $_{2}$ intercalates

Examining the surface phase diagram of IrTe $_{2}$ with photoemission

Comment on `Oxygen vacancy-induced magnetic moment in edge-sharing CuO $_{2}$ chains of Li $_{2}$ CuO $_{2}$ '

Multiband one-dimensional electronic structure and spectroscopic signature of Tomonoga-Luttinger liquid behavior in K $_{2}$ Cr $_{3}$ As $_{3}$

Evolution of the SrTiO $_{3}$ surface electronic state as a function of LaAlO $_{3}$ overlayer thickness

Carrier-Density Control of the Quantum-Confined 1 $T$ -TiSe $_{2}$ Charge-Density-Wave

Semimetal-to-semiconductor transition and charge-density-wave melting in $1 T$ -TiSe $_{2 - x}$ S $_{x}$ single crystals

Robustness of the charge-ordered phases in IrTe $_{2}$ against photoexcitation

Unveiling the complete dispersion of the giant Rashba split surface states of ferroelectric $I^\pm$ -GeTe(111) by alkali doping

Inelastic X-ray scattering from valence electrons near absorption edges of FeTe and TiSe $_{2}$