scholarly journals Local inversion symmetry breaking and spin-phonon coupling in the perovskite GdCrO3

2017 ◽  
Vol 96 (10) ◽  
Author(s):  
Sudipta Mahana ◽  
Bipul Rakshit ◽  
Raktima Basu ◽  
Sandip Dhara ◽  
Boby Joseph ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Inversion Symmetry ◽  
Phonon Coupling ◽  
Local Inversion

scholarly journals Extremely high upper critical field in BiCh2-based (Ch: S and Se) layered superconductor LaO0.5F0.5BiS2−xSex (x = 0.22 and 0.69)

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Kazuhisa Hoshi ◽  
Ryosuke Kurihara ◽  
Yosuke Goto ◽  
Masashi Tokunaga ◽  
Yoshikazu Mizuguchi
Keyword(s):  
Symmetry Breaking ◽  
Critical Field ◽  
Upper Critical Field ◽  
Layered Superconductor ◽  
Inversion Symmetry ◽  
Critical Fields ◽  
Local Inversion ◽  
Upper Critical Fields ◽  
Spin Polarisation ◽  
Inversion Asymmetry

AbstractCentrosymmetric compounds with local inversion symmetry breaking have tremendously interesting and intriguing physical properties. In this study, we focus on a BiCh2-based (Ch: S, Se) layered superconductor, as a system with local inversion asymmetry, because spin polarisation based on the Rashba–Dresselhaus-type spin–orbit coupling has been observed in centrosymmetric BiCh2-based LaOBiS2 systems, while the BiCh2 layer lacks local inversion symmetry. Herein, we report the existence of extremely high in-plane upper critical fields in the BiCh2-based system LaO0.5F0.5BiS2−xSex (x = 0.22 and 0.69). The superconducting states are not completely suppressed by the applied magnetic fields with strengths up to 55 T. Thus, we consider that the in-plane upper critical field is enhanced by the local inversion symmetry breaking and its layered structure. Our study will open a new pathway for the discovery of superconductors that exhibit a high upper critical field by focusing on the local inversion symmetry breaking.

scholarly journals Crystalline Arrays of Pairs of Molecular Rotors: Correlated Motion, Rotational Barriers, and Space-Inversion Symmetry Breaking Due to Conformational Mutations

2013 ◽  
Vol 135 (25) ◽  
pp. 9366-9376 ◽  
Author(s):  
Cyprien Lemouchi ◽  
Konstantinos Iliopoulos ◽  
Leokadiya Zorina ◽  
Sergey Simonov ◽  
Pawel Wzietek ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Molecular Rotors ◽  
Inversion Symmetry ◽  
Rotational Barriers ◽  
Correlated Motion ◽  
Space Inversion

Improper Inversion Symmetry Breaking and Piezoelectricity through Oxygen Octahedral Rotations in Layered Perovskite Family, LiRTiO4(R= Rare Earths)

2015 ◽  
Vol 2 (1) ◽  
pp. 1500196 ◽  
Author(s):  
Arnab Sen Gupta ◽  
Hirofumi Akamatsu ◽  
Megan E. Strayer ◽  
Shiming Lei ◽  
Toshihiro Kuge ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Rare Earths ◽  
Layered Perovskite ◽  
Inversion Symmetry

scholarly journals Electronically driven spin-reorientation transition of the correlated polar metal Ca3Ru2O7

2020 ◽  
Vol 117 (27) ◽  
pp. 15524-15529 ◽  
Author(s):  
Igor Marković ◽  
Matthew D. Watson ◽  
Oliver J. Clark ◽  
Federico Mazzola ◽  
Edgar Abarca Morales ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Sudden Onset ◽  
Spin Reorientation ◽  
Orbit Coupling ◽  
Inversion Symmetry ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Large Hole ◽  
Electronic Correlations ◽  
Spin Reorientation Transition

The interplay between spin–orbit coupling and structural inversion symmetry breaking in solids has generated much interest due to the nontrivial spin and magnetic textures which can result. Such studies are typically focused on systems where large atomic number elements lead to strong spin–orbit coupling, in turn rendering electronic correlations weak. In contrast, here we investigate the temperature-dependent electronic structure ofCa3Ru2O7, a4doxide metal for which both correlations and spin–orbit coupling are pronounced and in which octahedral tilts and rotations combine to mediate both global and local inversion symmetry-breaking polar distortions. Our angle-resolved photoemission measurements reveal the destruction of a large hole-like Fermi surface upon cooling through a coupled structural and spin-reorientation transition at 48 K, accompanied by a sudden onset of quasiparticle coherence. We demonstrate how these result from band hybridization mediated by a hidden Rashba-type spin–orbit coupling. This is enabled by the bulk structural distortions and unlocked when the spin reorients perpendicular to the local symmetry-breaking potential at the Ru sites. We argue that the electronic energy gain associated with the band hybridization is actually the key driver for the phase transition, reflecting a delicate interplay between spin–orbit coupling and strong electronic correlations and revealing a route to control magnetic ordering in solids.

scholarly journals Inversion-symmetry breaking in spin patterns by a weak magnetic field

2019 ◽  
Vol 99 (5) ◽  
Author(s):  
I. Krešić ◽  
G. R. M. Robb ◽  
G. Labeyrie ◽  
R. Kaiser ◽  
T. Ackemann
Keyword(s):  
Magnetic Field ◽  
Symmetry Breaking ◽  
Weak Magnetic Field ◽  
Inversion Symmetry
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