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Perturbed angular correlation spectroscopy combined with $ab-initio$ electronic structure calculations is used to unravel the structural phase transition path from the low-temperature polar structure to the high-temperature structural phase…

We have performed angle-resolved photoemission spectroscopy of Bi(111) thin films grown on Si(111), and investigated the evolution of band structure with temperature. We revealed an unexpectedly large temperature variation of the energy…

Mesoscale and Nanoscale Physics · Physics 2020-08-18 Takafumi Sato , Keiko Yamada , Takao Kosaka , Seigo Souma , Kunihiko Yamauchi , Katsuaki Sugawara , Tamio Oguchi , Takashi Takahashi

In the present work, we show the importance of temperature dependent energy band gap, E$_{g}$(T), in understanding the high temperature thermoelectric (TE) properties of material by considering LaCoO$_{3}$ (LCO) and ZnV$_{2}$O$_{4}$ (ZVO)…

Strongly Correlated Electrons · Physics 2016-10-21 Saurabh Singh , Sudhir K. Pandey

Based on experimental 59Co-NMR data in the temperature range between 0.1 and 300 K, we address the problem of the character of the Co 3d-electron based magnetism in Na0.7CoO2. Temperature dependent 59Co-NMR spectra reveal different Co…

Materials Science · Physics 2009-11-11 J. L. Gavilano , B. Pedrini , K. Magishi , J. Hinderer , M. Weller , H. R. Ott , S. M. Kazakov , J. Karpinski

We present a first-principles study of the relationship between stress, temperature and electronic properties in piezoelectric ZnO. Our method is a plane wave pseudopotential implementation of density functional theory and density…

Materials Science · Physics 2009-10-31 Nicola A. Hill , Umesh Waghmare

Experiments on the $Gd^{3+}$ Electron Spin Resonance (ESR) in the filled skutterudite $Ce_{1-x}Gd_{x}Fe_{4}P_{12}$ ($x \approx 0.001$), at temperatures where the host resistivity manifests a smooth insulator-metal crossover, provides…

Strongly Correlated Electrons · Physics 2016-12-28 P. A. Venegas , F. A. Garcia , D. J. Garcia , G. Cabrera , M. A. Avila , C. Rettori

Despite important breakthroughs in the last decade, the calculation of temperature dependent properties of solids still remains a challenging task, especially in the vicinity of structural phase transitions. We show that the combination of…

Materials Science · Physics 2022-06-20 Quintin N. Meier , Natalio Mingo , Ambroise van Roekeghem

The delicate interplay of electronic charge, spin, and orbital degrees of freedom is in the heart of many novel phenomena across the transition metal oxide family. Here, by combining high- resolution angle resolved photoemission…

Spin-orbit coupling in heavy 5$d$ metal oxides, in particular, iridates have received tremendous interest in recent years due to the realization of exotic electronic and magnetic phases. Here, we report the synthesis, structural, magnetic,…

Strongly Correlated Electrons · Physics 2022-10-26 Harish Kumar , M. Köpf , A. Ullrich , M. Klinger , A. Jesche , C. A. Kuntscher

One of the most important challenges in antiferromagnetic spintronics is the read-out of the N\'eel vector state. High current densities up to 10$^8$ Acm$^{-2}$ used in the electrical switching experiments cause notorious difficulty in…

Materials Science · Physics 2022-03-29 M. J. Grzybowski , C. F. Schippers , M. E. Bal , K. Rubi , U. Zeitler , M. Foltyn , B. Koopmans , H. J. M. Swagten

Transport and magnetic properties along with high resolution valence band photoemission study of disordered double perovskite Sr$_{2}$TiIrO$_{6}$ has been investigated. Insulator to insulator transition along with a magnetic transition…

Strongly Correlated Electrons · Physics 2023-01-18 B. H. Reddy , Asif Ali , Ravi Shankar Singh

We have investigated the temperature evolution of the magnetic structures of HoFeO$_3$ by single crystal neutron diffraction. The three different magnetic structures found as a function of temperature for \hfo\ are described by the magnetic…

Materials Science · Physics 2016-04-29 T. Chatterji , M. Meven , P. J. Brown

Electronic transport has been investigated for strong spin-orbit coupled perovskite SrIrO3 thin films grown at various substrate temperatures. The electronic transport of the SrIrO3 films is found to be very sensitive to the growth…

Strongly Correlated Electrons · Physics 2015-03-17 Abhijit Biswas , Yoon Hee Jeong

In this work we investigate doping and temperature dependences of electronic structure of system with strong electronic correlations and strong electron-phonon interaction modeling cuprates in the frameworks of the three-band p-d-Holstein…

Strongly Correlated Electrons · Physics 2016-12-09 I. A. Makarov , S. G. Ovchinnikov

Electronic structure of pulsed laser deposited epitaxial LaVO3 (LVO) thin film grown on LaAlO3 (001) (LAO) substrate, has been studied at room temperature and at 130 K, which is below the structural (141 K) and magnetic transition…

Strongly Correlated Electrons · Physics 2020-12-30 Anupam Jana , Rajamani Raghunathan , Ritu Rawat , R. J. Choudhary , D. M. Phase

We present a many body analysis of the multi-band Kondo lattice model. The study is then combined with the first principles TB-LMTO band structure calculations, in order to investigate the temperature dependent correlation effects in the…

Strongly Correlated Electrons · Physics 2010-02-09 A. Sharma , W. Nolting

We use a combination of optical spectra, first principles calculations, and energy dependent magneto-optical measurements to elucidate the electronic structure and to study the phase diagram of Ni$_3$V$_2$O$_8$. We find a remarkable…

Strongly Correlated Electrons · Physics 2007-05-23 R. C. Rai , J. Cao , S. Brown , J. L. Musfeldt , D. Kasinathan , D. J. Singh , G. Lawes , N. Rogado , R. J. Cava , X. Wei

By a combination of first-principles calculations and semi-classical Boltzmann transport theory, we investigate the effect of epitaxial strain on the electronic structure and transport properties of PtCoO$_2$ and PdCoO$_2$. In contrast to…

Materials Science · Physics 2016-02-09 Markus Ernst Gruner , Ulrich Eckern , Rossitza Pentcheva

We investigate the electronic structure of CaFe$_2$As$_2$ using high resolution photoemission spectroscopy. Experimental results exhibit three energy bands crossing the Fermi level making hole pockets around the $\Gamma$-point. Temperature…

Superconductivity · Physics 2014-04-03 G. Adhikary , D. Biswas , N. Sahadev , R. Bindu , N. Kumar , S. K. Dhar , A. Thamizhavel , K. Maiti

We apply the finite-temperature variational cluster approach to a strongly correlated and spin-orbit coupled model for four electrons (i.e. two holes) in the $t_{2g}$ subshell. We focus on parameters suitable for antiferromagnetic Mott…

Strongly Correlated Electrons · Physics 2021-07-21 Jan Lotze , Maria Daghofer