Richard Gaal

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Scientist

richard.gaal@epfl.ch +41 21 693 43 68

EPFL SB IPHYS LQM
PH D2 454 (Bâtiment PH)
Station 3
1015 Lausanne

+41 21 693 43 68
Office: PH D2 454
EPFL > SB > IPHYS > LQM

Web site: Web site: https://lqm.epfl.ch/

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Administrative data

Publications

Infoscience publications

Infoscience

Bullet pressure-cell design for neutron scattering experiments with horizontal magnetic fields and dilution temperatures

E. Fogh; G. Giriat; R. Gaal; L. Testa; J. Pásztorová et al.

Review of Scientific Instruments. 2025. DOI : 10.1063/5.0250156.

Detailed record

Observation of plastic ice VII by quasi-elastic neutron scattering

M. Rescigno; A. Toffano; U. Ranieri; L. Andriambariarijaona; R. Gaal et al.

Nature. 2025. DOI : 10.1038/s41586-025-08750-4.

Detailed record

Giant Splitting of the Hydrogen Rotational Eigenenergies in the C2 Filled Ice

S. Di Cataldo; M. Rescigno; L. Monacelli; U. Ranieri; R. Gaal et al.

Physical review letters. 2024. DOI : 10.1103/PhysRevLett.133.236101.

Detailed record

Cavity-magnon-polariton spectroscopy of strongly hybridized electro-nuclear spin excitations in LiHoF<inf>4</inf>

Y. Yang; P. Babkevich; R. Gaal; I. Živković; H. M. Rønnow

Scientific reports. 2024. DOI : 10.1038/s41598-024-75978-x.

Detailed record

Structural phase transition in NH₄F under extreme pressure conditions

U. Ranieri; C. Bellin; L. J. Conway; R. Gaal; J. S. Loveday et al.

Communications Chemistry. 2024. DOI : 10.1038/s42004-024-01309-w.

Detailed record

Large-cage occupation and quantum dynamics of hydrogen molecules in sII clathrate hydrates

U. Ranieri; L. del Rosso; L. E. Bove; M. Celli; D. Colognesi et al.

Journal Of Chemical Physics. 2024. DOI : 10.1063/5.0200867.

Detailed record

Observation of the most H2-dense filled ice under high pressure

U. Ranieri; S. Di Cataldo; M. Rescigno; L. Monacelli; R. Gaal et al.

Proceedings Of The National Academy Of Sciences Of The United States Of America (PNAS). 2023. DOI : 10.1073/pnas.2312665120.

Detailed record

Structure, heat capacity and Raman spectra of Ba2MgWO6 single crystals grown in BaCl2-MgCl2 flux

J. Pasztorova; W. H. Bi; R. Gaal; K. Kramer; I. Zivkovic et al.

Journal Of Solid State Chemistry. 2023. DOI : 10.1016/j.jssc.2023.124184.

Detailed record

Pressure dependence of superconducting properties of layered BaNi2P2

Y. Lee; R. Gaal; D. Evtushinsky; I. Zivkovic; I. Morozov et al.

Physica C-Superconductivity And Its Applications. 2023. DOI : 10.1016/j.physc.2023.1354286.

Detailed record

Diffusion in dense supercritical methane from quasi-elastic neutron scattering measurements

U. Ranieri; S. Klotz; R. Gaal; M. M. Koza; L. E. Bove

Nature Communications. 2021. DOI : 10.1038/s41467-021-22182-4.

Detailed record

White-line evolution in shocked solid Ta evidenced by synchrotron x-ray absorption spectroscopy

C. M. Pepin; R. Torchio; F. Occelli; E. Lescoute; O. Mathon et al.

Physical Review B. 2020. DOI : 10.1103/PhysRevB.102.144102.

Detailed record

Observation of methane filled hexagonal ice stable up to 150 GPa

S. Schaack; U. Ranieri; P. Depondt; R. Gaal; W. F. Kuhs et al.

Proceedings Of The National Academy Of Sciences Of The United States Of America (PNAS). 2019. DOI : 10.1073/pnas.1904911116.

Detailed record

Quantum Dynamics of H-2 and D-2 Confined in Hydrate Structures as a Function of Pressure and Temperature

U. Ranieri; M. M. Koza; W. F. Kuhs; R. Gaal; S. Klotz et al.

Journal Of Physical Chemistry C. 2019. DOI : 10.1021/acs.jpcc.8b11606.

Detailed record

Cyan titania nanowires: Spectroscopic study of the origin of the self-doping enhanced photocatalytic activity

P. Szirmai; B. Nafradi; A. Arakcheeva; E. Szilagyi; R. Gaal et al.

Catalysis Today. 2017. DOI : 10.1016/j.cattod.2016.10.024.

Detailed record

Pressure-tuned Transport Properties of Novel Iron-based Superconductors and Topological Insulators

A. Pisoni / L. Forró; R. Gaal (Dir.)

Lausanne, EPFL, 2016. DOI : 10.5075/epfl-thesis-7018.

Detailed record

Quantum versus classical protons in pure and salty ice under pressure

Y. Bronstein; P. Depondt; L. E. Bove; R. Gaal; A. M. Saitta et al.

Physical Review. 2016. DOI : 10.1103/PhysRevB.93.024104.

Detailed record

Anisotropic transport properties of tungsten disulfide

A. Pisoni; J. Jacimovic; R. Gaal; B. Náfrádi; H. Berger et al.

Scripta Materialia. 2016. DOI : 10.1016/j.scriptamat.2015.11.028.

Detailed record

Structural characterization of eutectic aqueous NaCl solutions under variable temperature and pressure conditions

A.-A. Ludl; L. E. Bove; A. M. Saitta; M. Salanne; T. C. Hansen et al.

Physical Chemistry Chemical Physics. 2015. DOI : 10.1039/C5CP00224A.

Detailed record

Effect of salt on the H-bond symmetrization in ice

L. E. Bove; R. Gaal; Z. Raza; A.-A. Ludl; S. Klotz et al.

Proceedings Of The National Academy Of Sciences Of The United States Of America (PNAS). 2015. DOI : 10.1073/pnas.1502438112.

Detailed record

Calibration of optical tweezers with non-spherical probes via high-resolution detection of Brownian motion

A. Butykai; F. M. Mor; R. Gaal; P. Dominguez-Garcia; L. Forro et al.

Computer Physics Communications. 2015. DOI : 10.1016/j.cpc.2015.06.024.

Detailed record

Microengineered CH3NH3PbI3 Nanowire/Graphene Phototransistor for Low-Intensity Light Detection at Room Temperature

M. Spina; M. Lehmann; B. Náfrádi; L. Bernard; E. Bonvin et al.

Small. 2015. DOI : 10.1002/smll.201501257.

Detailed record

Nanowires of Methylammonium Lead Iodide (CH(3)NH(3)Pbl(3)) Prepared by Low Temperature Solution-Mediated Crystallization

E. Horvath; M. Spina; Z. Szekrenyes; K. Kamaras; R. Gaal et al.

Nano Letters. 2014. DOI : 10.1021/nl5020684.

Detailed record

Ultra-Low Thermal Conductivity in Organic-Inorganic Hybrid Perovskite CH3NH3PbI3

A. Pisoni; J. Jacimovic; O. S. Barisic; M. Spina; R. Gaal et al.

The Journal of Physical Chemistry Letters. 2014. DOI : 10.1021/jz5012109.

Detailed record

Enhanced low-temperature thermoelectrical properties of BiTeCl grown by topotactic method

J. Jacimovic; X. Mettan; A. Pisoni; R. Gaal; S. Katrych et al.

Scripta Materialia. 2014. DOI : 10.1016/j.scriptamat.2013.12.017.

Detailed record

L4Fe2As2Te1-xO4-yFy (L = Pr, Sm, Gd): A layered oxypnictide superconductor with T-c up to 45 K

S. Katrych; A. Pisoni; S. Bosma; S. Weyeneth; N. D. Zhigadlo et al.

Physical Review B. 2014. DOI : 10.1103/PhysRevB.89.024518.

Detailed record

Signatures of quantum criticality in the thermopower of Ba(Fe1-xCox)(2)As-2

S. Arsenijevic; H. Hodovanets; R. Gaal; L. Forro; S. L. Bud'Ko et al.

Physical Review B. 2013. DOI : 10.1103/PhysRevB.87.224508.

Detailed record

Electrical conductivity of multi-walled carbon nanotubes-SU8 epoxy composites

C. Grimaldi; M. Mionic; R. Gaal; L. Forro; A. Magrez

Applied Physics Letters. 2013. DOI : 10.1063/1.4809923.

Detailed record

Tuning the length dispersion of multi-walled carbon nanotubes by ball milling

L. Forro; R. Gaal; C. Grimaldi; M. Mionic; P. R. Ribic et al.

Aip Advances. 2013. DOI : 10.1063/1.4821802.

Detailed record

From nanotubes to single crystals: Co doped TiO2

J. Jacimovic; E. Horvath; B. Nafradi; N. Nikseresht; R. Gaal et al.

Apl Materials. 2013. DOI : 10.1063/1.4820438.

Detailed record

Electrical property measurements of Cr-N codoped TiO2 epitaxial thin films grown by pulsed laser deposition

J. Jacimovic; R. Gaal; A. Magrez; L. Forró; M. Regmi et al.

Applied Physics Letters. 2013. DOI : 10.1063/1.4804240.

Detailed record

Pr4Fe2As2Te1-xO4: A layered FeAs-based superconductor

S. Katrych; K. Rogacki; A. Pisoni; S. Bosma; S. Weyeneth et al.

Physical Review B. 2013. DOI : 10.1103/PhysRevB.87.180508.

Detailed record

Low temperature resistivity, thermoelectricity, and power factor of Nb doped anatase TiO2

J. Jacimovic; R. Gaal; A. Magrez; J. Piatek; L. Forro et al.

Applied Physics Letters. 2013. DOI : 10.1063/1.4773517.

Detailed record

Carbon nanotubes-SU8 composite for flexible conductive inkjet printable applications

M. Mionic; K. Pataky; R. Gaal; A. Magrez; J. Brugger et al.

Journal Of Materials Chemistry. 2012. DOI : 10.1039/c2jm16547c.

Detailed record

Thermopower as a Unique Tool to Probe Quantum Phase Transitions

S. Arsenijevic / L. Forró; R. Gaal (Dir.)

Lausanne, EPFL, 2012. DOI : 10.5075/epfl-thesis-5475.

Detailed record

Defects and localization in chemically-derived graphene

L. Ciric; A. Sienkiewicz; R. Gaal; J. Jacimovic; C. Vaju et al.

Physical Review B. 2012. DOI : 10.1103/PhysRevB.86.195139.

Detailed record

Nature of the Charge Carriers and Conduction Mechanism in Anatase TiO2

J. Jaćimović / L. Forró; R. Gaal (Dir.)

Lausanne, EPFL, 2012. DOI : 10.5075/epfl-thesis-5563.

Detailed record

Pressure dependence of the large-polaron transport in anatase TiO2 single crystals

J. Jacimovic; C. Vaju; A. Magrez; H. Berger; L. Forro et al.

Europhysics Letters. 2012. DOI : 10.1209/0295-5075/99/57005.

Detailed record

Synthesis, electrical resistivity, thermo-electric power and magnetization of cubic ZnMnO3

J. Jacimovic; Z. Mickovic; R. Gaal; R. Smajda; C. Vaju et al.

Solid State Communications. 2011. DOI : 10.1016/j.ssc.2010.12.025.

Detailed record

Pressure effects on the transport coefficients of Ba(Fe_{1−x}Co_{x})_{2}As_{2}

S. Arsenijević; R. Gaál; A. S. Sefat; M. A. Mcguire; B. C. Sales et al.

Physical Review B. 2011. DOI : 10.1103/PhysRevB.84.075148.

Detailed record

High-pressure study of anatase TiO2

J. Jaćimović; C. Vâju; R. Gaál; A. Magrez; H. Berger et al.

Materials. 2010. DOI : 10.3390/ma3031509.

Detailed record

Microwave frequency modulation in continuous-wave far-infrared ESR utilizing a quasi-optical reflection bridge

B. Nafradi; R. Gaal; T. Feher; L. Forro

Journal of Magnetic Resonance. 2008. DOI : 10.1016/j.jmr.2008.03.004.

Detailed record

Resistive switching in beta-SrV6O15

A. Akrap; R. Gaal; L. Forro

The European Physical Journal B. 2008. DOI : 10.1140/epjb/e2008-00074-4.

Detailed record

Continuous-wave far-infrared ESR spectrometer for high-pressure measurements

B. Nafradi; R. Gaal; A. Sienkiewicz; T. Feher; L. Forro

Journal of Magnetic Resonance. 2008. DOI : 10.1016/j.jmr.2008.09.014.

Detailed record

Matthiessen's rule in MgB2: Resistivity and T-c as a function of point defect concentration

B. Sipos; N. Barisic; R. Gaal; L. Forro; J. Karpinski et al.

Physical Review B. 2007. DOI : 10.1103/PhysRevB.76.132504.

Detailed record

Pressure-induced tuning of phase transition and role of disorder in electrical transport properties of beta-Sr_xV_6O_15

A. Akrap; N. Barisic; R. Gaal; L. Forro

Physical Review B. 2007. DOI : 10.1103/PhysRevB.76.235111.

Detailed record

High-pressure infrared spectroscopy: Tuning of the low-energy excitations in correlated electron systems

I. Kezsmarki; R. Gaal; C. C. Homes; B. Sipos; H. Berger et al.

Physical Review B. 2007. DOI : 10.1103/PhysRevB.76.205114.

Detailed record

Effect of electron and ultraviolet irradiation on aligned carbon nanotube fibers

C. Milko; J. W. Seo; R. Gaal; A. Kulik; L. Forro

Physica Status Solidi B-Basic Solid State Physics. 2006. DOI : 10.1002/pssb.200669135.

Detailed record

Effect of ultraviolet light irradiation on macroscopic single-walled carbon nanotube bundles

C. Miko; M. Milas; J. W. Seo; R. Gaal; A. Kulik et al.

Applied Physics Letters. 2006. DOI : 10.1063/1.2195013.

Detailed record

Separation of Orbital Contributions to the Optical Conductivity of BaVS3

I. Kézsmárki; G. Mihály; R. Gaál; N. Barišić; A. Akrap et al.

Physical Review Letters. 2006. DOI : 10.1103/PhysRevLett.96.186402.

Detailed record

Coexistence of ferromagnetism and high-temperature superconductivity in Dy-doped BiPbSrCaCuO

H. Berger; D. Ariosa; R. Gaal; A. Saleh; G. Margaritondo et al.

Surface Review and Letters. 2002. DOI : 10.1142/S0218625X02003585.

Detailed record

Phonon anomaly at the charge ordering transition in 1T-TaS2

L. V. Gasparov; K. G. Brown; A. C. Wint; D. B. Tanner; H. Berger et al.

Physical Review B. 2002. DOI : 10.1103/PhysRevB.66.094301.

Detailed record

High-resolution angle-resolved photoemission investigation of the quasiparticle scattering processes in a model Fermi liquid: 1T-TiTe2

L. Perfetti; C. Rojas; A. Reginelli; L. Gavioli; H. Berger et al.

Physical Review B. 2001. DOI : 10.1103/PhysRevB.64.115102.

Detailed record

Teaching & PhD

Past EPFL PhD Students

Arsenijevic Stevan , Jacimovic Jacim , Pisoni Andrea ,

Richard Gaal

Scientist

Publications

Infoscience publications

Infoscience

Bullet pressure-cell design for neutron scattering experiments with horizontal magnetic fields and dilution temperatures

Observation of plastic ice VII by quasi-elastic neutron scattering

Giant Splitting of the Hydrogen Rotational Eigenenergies in the C2 Filled Ice

Cavity-magnon-polariton spectroscopy of strongly hybridized electro-nuclear spin excitations in LiHoF<inf>4</inf>

Structural phase transition in NH₄F under extreme pressure conditions

Large-cage occupation and quantum dynamics of hydrogen molecules in sII clathrate hydrates

Observation of the most H2-dense filled ice under high pressure

Structure, heat capacity and Raman spectra of Ba2MgWO6 single crystals grown in BaCl2-MgCl2 flux

Pressure dependence of superconducting properties of layered BaNi2P2

Diffusion in dense supercritical methane from quasi-elastic neutron scattering measurements

White-line evolution in shocked solid Ta evidenced by synchrotron x-ray absorption spectroscopy

Observation of methane filled hexagonal ice stable up to 150 GPa

Quantum Dynamics of H-2 and D-2 Confined in Hydrate Structures as a Function of Pressure and Temperature

Cyan titania nanowires: Spectroscopic study of the origin of the self-doping enhanced photocatalytic activity

Pressure-tuned Transport Properties of Novel Iron-based Superconductors and Topological Insulators

Quantum versus classical protons in pure and salty ice under pressure

Anisotropic transport properties of tungsten disulfide

Structural characterization of eutectic aqueous NaCl solutions under variable temperature and pressure conditions

Effect of salt on the H-bond symmetrization in ice

Calibration of optical tweezers with non-spherical probes via high-resolution detection of Brownian motion

Microengineered CH3NH3PbI3 Nanowire/Graphene Phototransistor for Low-Intensity Light Detection at Room Temperature

Nanowires of Methylammonium Lead Iodide (CH(3)NH(3)Pbl(3)) Prepared by Low Temperature Solution-Mediated Crystallization

Ultra-Low Thermal Conductivity in Organic-Inorganic Hybrid Perovskite CH3NH3PbI3

Enhanced low-temperature thermoelectrical properties of BiTeCl grown by topotactic method

L4Fe2As2Te1-xO4-yFy (L = Pr, Sm, Gd): A layered oxypnictide superconductor with T-c up to 45 K

Signatures of quantum criticality in the thermopower of Ba(Fe1-xCox)(2)As-2

Electrical conductivity of multi-walled carbon nanotubes-SU8 epoxy composites

Tuning the length dispersion of multi-walled carbon nanotubes by ball milling

From nanotubes to single crystals: Co doped TiO2

Electrical property measurements of Cr-N codoped TiO2 epitaxial thin films grown by pulsed laser deposition

Pr4Fe2As2Te1-xO4: A layered FeAs-based superconductor

Low temperature resistivity, thermoelectricity, and power factor of Nb doped anatase TiO2

Carbon nanotubes-SU8 composite for flexible conductive inkjet printable applications

Thermopower as a Unique Tool to Probe Quantum Phase Transitions

Defects and localization in chemically-derived graphene

Nature of the Charge Carriers and Conduction Mechanism in Anatase TiO2

Pressure dependence of the large-polaron transport in anatase TiO2 single crystals

Synthesis, electrical resistivity, thermo-electric power and magnetization of cubic ZnMnO3

Pressure effects on the transport coefficients of Ba(Fe_{1−x}Co_{x})_{2}As_{2}

High-pressure study of anatase TiO2

Microwave frequency modulation in continuous-wave far-infrared ESR utilizing a quasi-optical reflection bridge

Resistive switching in beta-SrV6O15

Continuous-wave far-infrared ESR spectrometer for high-pressure measurements

Matthiessen's rule in MgB2: Resistivity and T-c as a function of point defect concentration

Pressure-induced tuning of phase transition and role of disorder in electrical transport properties of beta-Sr_xV_6O_15

High-pressure infrared spectroscopy: Tuning of the low-energy excitations in correlated electron systems

Effect of electron and ultraviolet irradiation on aligned carbon nanotube fibers

Effect of ultraviolet light irradiation on macroscopic single-walled carbon nanotube bundles

Separation of Orbital Contributions to the Optical Conductivity of BaVS3

Coexistence of ferromagnetism and high-temperature superconductivity in Dy-doped BiPbSrCaCuO

Phonon anomaly at the charge ordering transition in 1T-TaS2

High-resolution angle-resolved photoemission investigation of the quasiparticle scattering processes in a model Fermi liquid: 1T-TiTe2

Teaching & PhD

Past EPFL PhD Students

All postal addresses and positions