Article
Spectroscopy
R. C. de Oliveira, M. N. G. Ferreira Junior, G. A. Calligaris, A. O. dos Santos, C. M. R. Remedios
Summary: Crystals of L-asparagine monohydrate doped with Fe(III) were found to undergo conformational changes under high pressure, which are reversible.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Nanoscience & Nanotechnology
L. Hamui, G. Santana, S. A. Tomas, O. de Melo
Summary: 1T' and 2H MoTe2 films were obtained using isothermal close space tellurization method, and the influence of precursor film thickness and crystalline state on the obtained phase was analyzed. The results showed that the orientation of the substrate and annealing treatment had significant effects on the obtained phase, highlighting the importance of controlling the MoTe2 phase.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2023)
Article
Materials Science, Multidisciplinary
Bishnupada Ghosh, Mrinmay Sahu, Debabrata Samanta, Goutam Dev Mukherjee
Summary: ZrSe2 undergoes a pressure-induced structural phase transition from hexagonal 1T phase to monoclinic phase, which starts around 5.9 GPa and completes around 14.8 GPa. Anomalies in high pressure Raman measurements suggest a possible electronic phase transition mediated by the differential strain inside the sample.
BULLETIN OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Seohui Kang, Dongyeun Won, Heejun Yang, Chia-Hsien Lin, Ching-Shun Ku, Ching-Yu Chiang, Sera Kim, Suyeon Cho
Summary: This study investigates power-dependent laser thinning and phase control of semiconducting hexagonal MoTe2. Low-power laser thinning retains the crystal structure, while high-power laser thinning causes phase transition and chalcogen vacancies.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Alejandro Fajardo-Peralta, Minh An T. Nguyen, J. Valenzuela-Benavides, Alexander Brodie, Rafael Nunes Gontijo, Ana Laura Elias, Nestor Perea-Lopez, Thomas E. Mallouk, Mauricio Terrones
Summary: In this work, the structural and spectroscopic characterization of MoSxSe2-x solid solutions synthesized by chemical vapor transport was reported. Various analytical techniques were used to analyze the bulk crystals, revealing different types of crystals and their characteristics. The Raman spectroscopy and XPS analysis showed a correlation between the spectra and the composition of the samples.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Chemistry, Multidisciplinary
Yu-Chen Leng, Miao-Ling Lin, Yu Zhou, Jiang-Bin Wu, Da Meng, Xin Cong, Hai Li, Ping-Heng Tan
Summary: The study reveals a significant impact of interfacial coupling on the out-of-plane intralayer modes in twisted multilayer structures, while the in-plane intralayer modes are less affected by the interfacial coupling. This indicates that the characteristics of intralayer modes in twisted multilayers are influenced by the presence of interfacial coupling.
Article
Chemistry, Multidisciplinary
Riccardo Scarfiello, Elisabetta Mazzotta, Davide Altamura, Concetta Nobile, Rosanna Mastria, Simona Rella, Cinzia Giannini, Pantaleo Davide Cozzoli, Aurora Rizzo, Cosimino Malitesta
Summary: This study provides a rational understanding of two dimensionally controllable 2D-WS2 colloidal nanoflakes through X-ray photoelectron spectroscopy and structural inspection, allowing for clear determination of phase components and sulfur ion presence.
Article
Materials Science, Multidisciplinary
E. A. Ekimov, K. M. Kondrina, I. P. Zibrov, S. G. Lyapin, M. Lovygin, P. R. Kazanskiy
Summary: The carbonization behavior of iodinated adamantane was studied at high pressures, revealing that iodine can catalyze the formation of nanodiamonds, but hydrocarbon iodination is necessary as a prerequisite. The findings suggest the catalytic activity of iodine in the formation of diamonds.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Physics, Condensed Matter
Rajesh Jana, Apurba Dutta, Pinku Saha, Kapil Mandal, Bishnupada Ghosh, Amreesh Chandra, I Das, Goutam Dev Mukherjee
Summary: A comprehensive study on BiGdO3 at high temperatures and pressures revealed an antiferroelectric to paraelectric transition, as well as the potential for an antiferroelectric to ferroelectric transition.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Andre Ebel, Olivier Marsan, Jacques Lacaze, Benoit Malard
Summary: During rapid thermal cycling in automotive exhaust manifolds, a high-silicon cast iron was tested at 800 degrees C, leading to the formation of a columnar zone at the substrate/oxide interface. Detailed analysis proposed a mechanism for the formation of this unique structure.
Article
Physics, Condensed Matter
A. G. Asadov, D. P. Kozlenko, A. Mammadov, R. Mehdiyeva, S. E. Kichanov, E. V. Lukin, O. N. Lis, A. V. Rutkauskas
Summary: The high-pressure effects on the crystal structure and vibration spectra of the perovskite-like layered La2Ti2O7 compound were investigated. Phase transition from the initial monoclinic phase to another monoclinic phase was observed at a pressure of 17.3 GPa. The pressure-induced phase transitions in La2Ti2O7 were accompanied by anomalies in the unit cell parameters and vibrational modes.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Physical
Keiji Kuno, Takahiro Matsuoka, Ryo Masuda, Takaya Mitsui, Makoto Seto, Akihiko Machida, Hiroshi Fujihisa, Naohisa Hirao, Yasuo Ohishi, Katsuya Shimizu, Shigeo Sasaki
Summary: Raman scattering, Mossbauer spectroscopy, and X-ray diffraction measurements have revealed crystal structure changes and Eu2+ to Eu3+ transformations in EuHx compressed in high-pressure H-2, through multiple mixed-valence phase transitions. A transition occurs near 7.0 GPa, and Mossbauer spectroscopy can serve as a useful marker for detecting hydrogen storage in metal hydrides.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Nishant N. Patel, Meenakshi Sunder
Summary: Results of high pressure Raman and ADXRD study on CsIBr2 show two phase transitions at 5 and 19 GPa, with bulk moduli of 10.9(8) GPa and 17.8(1) GPa for the orthorhombic and trigonal phases, respectively.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Xing Xie, Junnan Ding, Biao Wu, Haihong Zheng, Shaofei Li, Chang-Tian Wang, Jun He, Zongwen Liu, Jian-Tao Wang, Yanping Liu
Summary: This study presents a dynamic tuning method for twisted WSe2/WSe2 homobilayers and demonstrates the powerful tuning of interlayer coupling. It is found that the introduction of a moire superlattice leads to hybridized excitons and different pressure-evolution exciton behaviors compared to natural bilayers.
Article
Spectroscopy
F. M. Rufino, D. L. M. Vasconcelos, P. T. C. Freire, R. C. Oliveira, C. M. R. Remedios, J. H. da Silva, F. G. Alabarse, J. A. Lima
Summary: Maleic acid was studied under high pressure conditions using Raman spectroscopy and powder synchrotron XRD. The results showed a decrease in lattice parameters and a reduction in unit cell volume. Changes in compressibility were observed at specific pressure points.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Debabrata Samanta, Pinku Saha, Bishnupada Ghosh, Sonu Pratap Chaudhary, Sayan Bhattacharyya, Swastika Chatterjee, Goutam Dev Mukherjee
Summary: In this study, high pressure effects on Cs3Bi2Br9 halide perovskite were investigated using X-ray diffraction, Raman spectroscopy, and photoluminescence measurements. The sample exhibited photoluminescence in a broad range of 550-900 nm above 1.4 GPa, which was attributed to an isostructural transition. The enhancement in photoluminescence intensity with pressure was found to be driven by an increase in distortion of BiBr6 octahedra. Additionally, electronic band structure calculations indicated that the high pressure phase of the sample is an indirect band gap semiconductor.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Physics, Multidisciplinary
Pinku Saha, Konstantin Glazyrin, Goutam Dev Mukherjee
Summary: The orthorhombic phase of Si-doped Fe carbide was synthesized under high-pressure and high-temperature conditions, characterized by XRD, TEM, and Raman spectroscopy. The evolution of equation of state parameters and bulk modulus under different pressures was studied, showing good agreement with data under inner core conditions.
HIGH PRESSURE RESEARCH
(2021)
Article
Physics, Condensed Matter
Rajesh Jana, Apurba Dutta, Pinku Saha, Kapil Mandal, Bishnupada Ghosh, Amreesh Chandra, I Das, Goutam Dev Mukherjee
Summary: A comprehensive study on BiGdO3 at high temperatures and pressures revealed an antiferroelectric to paraelectric transition, as well as the potential for an antiferroelectric to ferroelectric transition.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Chemistry, Physical
Subrata Karmakar, Bidisha Mukherjee, Alka B. Garg, Deepak S. Gavali, Ranjit Thapa, Saheli Banerjee, Goutam Dev Mukherjee, Ariful Haque, Dhrubananda Behera
Summary: This study investigates the behavior of trirutile structured NiTa2O6 under high pressure through experiments and calculations. The results show that NiTa2O6 undergoes a new quenchable phase transition at pressures above 11.8 GPa, accompanied by softening of internal modes and increased density. The experimental results also demonstrate that the structure of NiTa2O6 undergoes distortion at high pressures, leading to the weakening of various Raman-active modes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Physics, Applied
Ananya Chattaraj, Joshua Asirvatham, Gangadhar Das, Gouranga Manna, Pinku Saha, Vijay Kumar, Aloke Kanjilal
Summary: The beta phase of tungsten has attracted great interest for spintronic applications. The growth of stable beta-W films up to a thickness of ~180nm has been demonstrated using dc magnetron sputtering. The influence of oxygen in the atomic structure of beta-W has been explored, and controlled doping of oxygen can achieve a stable polycrystalline beta phase.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
Mrinmay Sahu, Bishnupada Ghosh, Rajesh Jana, Jinguang Cheng, Goutam Dev Mukherjee
Summary: A detailed high-pressure investigation on Fe4Nb2O9 reveals a structural transition and possible change in magnetic and ferroelectric properties above 8.8 GPa.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
S. Mukherjee, G. Manna, P. Saha, S. Majumdar, S. Giri
Summary: We report the ferroelectric order and linear magnetoelectric effect in Na2Co2TeO6. The ferroelectric order, observed at around 72 K, is much higher than the antiferromagnetic order at 26 K. Reasonable electrocaloric effect is observed around the ferroelectric order temperature. The magnetic entropy change starts at the onset of ferroelectric order and reaches a maximum value at 35 K, which is higher than the antiferromagnetic ordering temperature.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Chemistry, Physical
Abhishek Bharti, Gouranga Manna, Pinku Saha, Govindaraj Achutarao, Aninda J. Bhattacharyya
Summary: In this study, the different phases formed at the electrodes in a Li-CO2 battery were systematically diagnosed. It was found that the CO2 cathode with MXene/GO composite material had a lower overpotential compared to GO, and exhibited better stability and performance. High-resolution synchrotron X-ray diffraction and Raman scattering spectroscopy further demonstrated the superior ability of MXene/GO composite material to convert Li2CO3 to Li and CO2.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Anusmita Chakravorty, Alexandre Boulle, Aurelien Debelle, Isabelle Monnet, Gouranga Manna, Pinku Saha, Mrinmay Kumar Mukhopadhyay, Debdulal Kabiraj
Summary: In this study, ion irradiation was used to induce specific crystalline order and depth-controlled strain states in 4H-SiC. Results showed that the strain level and crystalline structure of the material could be recovered through in situ thermal annealing.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Physics, Multidisciplinary
P. Saha, G. D. Mukherjee
Summary: This study reports the thermal conductivity measurements of iron and nickel at high pressures and temperatures near the core-mantle boundary of Mercury and Mars. It is found that the thermal conductivity drops suddenly at the melting temperature, providing a useful technique for estimating melting temperatures at high pressures. The thermal conductivity values for iron and nickel under different conditions are obtained, and the adiabatic heat conduction at the outer core of Mercury and Mars is estimated using these values.
PRAMANA-JOURNAL OF PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Bishnupada Ghosh, Mrinmay Sahu, Debabrata Samanta, Pinku Saha, Anshuman Mondal, Goutam Dev Mukherjee
Summary: In this study, a detailed high pressure investigation was carried out on 1T ZrSe2 with an excess of 3 at.% Zr using x-ray diffraction, Raman spectroscopy, and low temperature resistivity measurements. The results showed a gradual structural transition to a monoclinic structure with a mixed phase in a certain pressure range, as well as the presence of the Kondo effect in the sample, which may be attributed to the excess Zr.
Correction
Materials Science, Multidisciplinary
Debabrata Samanta, Sonu Pratap Chaudhary, Bishnupada Ghosh, Sayan Bhattacharyya, Gaurav Shukla, Goutam Dev Mukherjee
Article
Materials Science, Multidisciplinary
Debabrata Samanta, Sonu Pratap Chaudhary, Bishnupada Ghosh, Sayan Bhattacharyya, Gaurav Shukla, Goutam Dev Mukherjee
Summary: This study investigates the properties of a lead-free halide perovskite through high-pressure photoluminescence, Raman scattering, and x-ray diffraction measurements. Electronic transition and structural changes were observed at around 3 GPa, and below-bandgap broadband emission was observed in the photoluminescence measurement. These results reveal some unique properties of the material.
