1
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Mader DS, Niemann R, Wolf M, Maehrlein SF, Paarmann A. Sum-frequency generation spectro-microscopy in the reststrahlen band of wurtzite-type aluminum nitride. J Chem Phys 2024; 161:094706. [PMID: 39234972 DOI: 10.1063/5.0220619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Accepted: 08/19/2024] [Indexed: 09/06/2024] Open
Abstract
Nonlinear-optical microscopy and spectroscopy provide detailed spatial and spectroscopic contrast, specifically sensitive to structural symmetry and order. Ferroics, in particular, have been widely studied using second harmonic generation imaging, which provides detailed information on domain structures but typically lacks spectroscopic detail. In contrast, infrared-visible sum-frequency generation (SFG) spectroscopy reveals details of the atomic structure and bonding via vibrational resonances, but conventionally lacks spatial information. In this work, we combine the benefits of nonlinear optical imaging and SFG spectroscopy by employing SFG spectro-microscopy using an infrared free-electron laser. In particular, we demonstrate the feasibility of SFG spectro-microscopy for spectroscopy using in-plane anisotropic wurtzite-type aluminum nitride as a model system. We find the experimental spectra to agree well with our theoretical calculations, and we show the potential of our microscope to provide spatially resolved spectroscopic information in inhomogeneous systems such as ferroics and their domains in the near future.
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Affiliation(s)
- D S Mader
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - R Niemann
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - M Wolf
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - S F Maehrlein
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - A Paarmann
- Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
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2
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Jiang D, Jiang X, Zhang X, Li C, Liu K, Ma Y, Cheng HM, Pei T, Wen T, Lin Z, Li F, Wang Y. Second-Harmonic-Generation Switching via Pressure-Suppressed Dynamical Disorder. J Am Chem Soc 2024; 146:23508-23516. [PMID: 39126391 DOI: 10.1021/jacs.4c07504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/12/2024]
Abstract
Second-harmonic-generation (SHG) switching is an emerging phenomenon with potential applications in bistable storage and optical switches while also serving as a sensitive probe for inversion-symmetry. Temperature-induced disorder-order phase transition has been proven to be a rational design strategy for achieving SHG bi-state switching; however, pressure-sensitive SHG switching via a disorder-order structural transition mechanism is rarely reported and lacks sensitivity and cyclicity as practical switching materials. Herein, we demonstrate the pressure-induced "dynamical disorder-order" phase transition as an effective strategy for triggering SHG and SHG switching in NH4Cl. The "dynamical disorder-order" phase transition of NH4Cl occurring at as low as 1 GPa is confirmed by comprehensive in situ high-pressure XRD, molecular vibrational spectra, and Brillouin scattering spectra. The pressure-induced SHG is responsive to a wide excitation wavelength region (800-1500 nm), and the "off-on" switching is reversible for up to 50 cycles, setting a record for pressure-driven switching materials. It is worth noting that when pressure is further increased to 14 GPa, NH4Cl exhibits another SHG "on-off" switching, which makes it the first triplet SHG "off-on-off" switching material. Molecular dynamics simulations reveal the key role of N-H···Cl hydrogen bonding in the pressure-induced "dynamic disorder-order" mechanism. Finally, we verified that chemical pressure and physical pressure can jointly regulate the SHG switching behavior of NH4X (X = Cl, Br). The pressure-driven "dynamic disorder-order" transition mechanism sheds light on the rational design of multistable SHG switching materials for photoswitches and information storage.
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Affiliation(s)
- Dequan Jiang
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Xingxing Jiang
- Functional Crystals Lab, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xue Zhang
- State Key Lab of Superhard Materials, Jilin University, Changchun 130012, China
| | - Chen Li
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100193, China
| | - Ke Liu
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100193, China
| | - Yingying Ma
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100193, China
| | - Hao-Ming Cheng
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100193, China
| | - Tianyao Pei
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100193, China
| | - Ting Wen
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100193, China
| | - Zheshuai Lin
- Functional Crystals Lab, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Fangfei Li
- State Key Lab of Superhard Materials, Jilin University, Changchun 130012, China
| | - Yonggang Wang
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100193, China
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3
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Aoki S, Dong Y, Wang Z, Huang XSW, Itahashi YM, Ogawa N, Ideue T, Iwasa Y. Giant Modulation of the Second Harmonic Generation by Magnetoelectricity in Two-Dimensional Multiferroic CuCrP 2S 6. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2312781. [PMID: 38533684 DOI: 10.1002/adma.202312781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 03/22/2024] [Indexed: 03/28/2024]
Abstract
Multiferroic materials have attracted considerable attention owing to their unique magnetoelectric or magnetooptical properties. The recent discovery of few-layer van der Waals multiferroic crystals provides a new research direction for controlling the multiferroic properties in the atomic layer limit. However, research on few-layer multiferroic crystals is limited and the effect of thickness-dependent symmetries on those properties is less explored. In this study, the symmetries and magnetoelectric responses of van der Waals multiferroic CuCrP2S6 are investigated by optical second harmonic generation (SHG). Structural and magnetic phase transitions are successfully probed by the temperature-dependent SHG signals, revealing significant changes by applying the magnetic field reflecting the magnetoelectric effect. Moreover, it is found that symmetries and resultant magnetoelectric responses can be modulated by the number of layers. These results offer a new principle of controlling the multiferroicity and indicate that 2D van der Waals multiferroic material is a promising building block for functional nanodevices.
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Affiliation(s)
- Shunta Aoki
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
| | - Yu Dong
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
| | - Ziqian Wang
- RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan
| | - Xiang S W Huang
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
| | - Yuki M Itahashi
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
| | - Naoki Ogawa
- RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan
| | - Toshiya Ideue
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
- The Institute for Solid State Physics (ISSP), The University of Tokyo, Kashiwa, 277-8581, Japan
| | - Yoshihiro Iwasa
- Department of Applied Physics, The University of Tokyo, Tokyo, 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan
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4
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Ovchinnikova EN, Rogalev A, Wilhelm F, de Bergevin F, Dmitrienko VE, Oreshko AP, Kozlovskaya KA, Bakonin RD. Helicity-dependent resonant X-ray scattering in CuB 2O 4. JOURNAL OF SYNCHROTRON RADIATION 2021; 28:1455-1465. [PMID: 34475293 DOI: 10.1107/s1600577521005853] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 06/06/2021] [Indexed: 06/13/2023]
Abstract
Exploitation of X-ray circular polarized beams to study forbidden Bragg reflections and new information that could be obtained in these experiments are discussed. It is shown that the intensities of such reflections can be different for the right- and left-circular polarizations (i.e. exhibiting circular dichroism) even for the dipole-dipole resonant transitions involved in the scattering process. This difference can be observed only in crystals having no center of inversion. Here, this approach is used to study helicity-dependent resonant diffraction in copper metaborate CuB2O4 single crystal, which is non-centrosymmetric but achiral. Nonetheless, a strong circular dichroism has been observed for hh0 forbidden reflections in the vicinity of the Cu K-edge. This effect is shown to originate from dipolar transitions in Cu atoms occupying the 8(d) Wyckoff position only.
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Affiliation(s)
- E N Ovchinnikova
- Physics Department, Moscow State University, Moscow 119899, Russia
| | - A Rogalev
- European Synchrotron Radiation Facility, 38000 Grenoble, France
| | - F Wilhelm
- European Synchrotron Radiation Facility, 38000 Grenoble, France
| | - F de Bergevin
- European Synchrotron Radiation Facility, 38000 Grenoble, France
| | - V E Dmitrienko
- A. V. Shubnikov Institute of Crystallography, FSRC Crystallography and Photonics RAS, Moscow 119333, Russia
| | - A P Oreshko
- Physics Department, Moscow State University, Moscow 119899, Russia
| | - K A Kozlovskaya
- Physics Department, Moscow State University, Moscow 119899, Russia
| | - R D Bakonin
- Physics Department, Moscow State University, Moscow 119899, Russia
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5
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Toyoda S, Fiebig M, Arima TH, Tokura Y, Ogawa N. Nonreciprocal second harmonic generation in a magnetoelectric material. SCIENCE ADVANCES 2021; 7:7/16/eabe2793. [PMID: 33863720 PMCID: PMC8051877 DOI: 10.1126/sciadv.abe2793] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 02/04/2021] [Indexed: 06/12/2023]
Abstract
Mirror symmetries are of particular importance because they are connected to fundamental properties and conservation laws. Spatial inversion and time reversal are typically associated to charge and spin phenomena, respectively. When both are broken, magnetoelectric cross-coupling can arise. In the optical regime, a difference between forward and backward propagation of light may result. Usually, this nonreciprocal response is small. We show that a giant nonreciprocal optical response can occur when transferring from linear to nonlinear optics, specifically second harmonic generation (SHG). CuB2O4 exhibits SHG transmission changes by almost 100% upon reversal of a magnetic field of just ±10 mT. The observed nonreciprocity results from an interference between magnetic-dipole and electric-dipole SHG. Although the former is inherently weaker than the latter, a resonantly enhanced magnetic-dipole transition has a comparable amplitude as a nonresonant electric-dipole transition, thus maximizing the nonreciprocity. Multiferroics and magnetoelectrics are an obvious materials platform to exhibit nonreciprocal nonlinear optical functionalities.
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Affiliation(s)
- Shingo Toyoda
- RIKEN Center for Emergent Matter Science (CEMS), Saitama 351-0198, Japan.
| | - Manfred Fiebig
- RIKEN Center for Emergent Matter Science (CEMS), Saitama 351-0198, Japan
- Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
| | - Taka-Hisa Arima
- RIKEN Center for Emergent Matter Science (CEMS), Saitama 351-0198, Japan
- Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8561, Japan
| | - Yoshinori Tokura
- RIKEN Center for Emergent Matter Science (CEMS), Saitama 351-0198, Japan
- Tokyo College, University of Tokyo, Tokyo 113-8656, Japan
- Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
| | - Naoki Ogawa
- RIKEN Center for Emergent Matter Science (CEMS), Saitama 351-0198, Japan
- Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
- PRESTO, Japan Science and Technology Agency (JST), Kawaguchi 332-0012, Japan
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6
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Toyoda S, Abe N, Arima T. Nonreciprocal Refraction of Light in a Magnetoelectric Material. PHYSICAL REVIEW LETTERS 2019; 123:077401. [PMID: 31491127 DOI: 10.1103/physrevlett.123.077401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Indexed: 06/10/2023]
Abstract
In magnetoelectric materials, where the time-reversal and space-inversion symmetries are simultaneously broken, optical properties can differ between the opposite propagation directions of light. We report on an experimental observation of nonreciprocal trajectory of a light ray in magnetoelectric material CuB_{2}O_{4}. The light is refracted in different ways between the opposite propagation directions of light. We find a nonreciprocal refraction at the interface between a matter with macroscopic toroidal moment and vacuum. The resultant nonreciprocal deflection of the light is 0.005 deg, which is quantitatively explained using Fermat's principle.
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Affiliation(s)
- S Toyoda
- Department of Advanced Materials Science, The University of Tokyo, Kashiwa 277-8561, Japan
| | - N Abe
- Department of Advanced Materials Science, The University of Tokyo, Kashiwa 277-8561, Japan
| | - T Arima
- Department of Advanced Materials Science, The University of Tokyo, Kashiwa 277-8561, Japan
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7
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Rizzo A, Rikken GLJA, Mathevet R. Ab initio study of the enantio-selective magnetic-field-induced second harmonic generation in chiral molecules. Phys Chem Chem Phys 2016; 18:1846-58. [PMID: 26682613 DOI: 10.1039/c5cp07127e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a systematic ab initio study of enantio-selective magnetic-field-induced second harmonic generation (MFISHG) on a set of chiral systems ((l)-alanine, (l)-arginine and (l)-cysteine; 3,4-dehydro-(l)-proline; (S)-α-phellandrene; (R,S)- and (S,S)-cystine disulphide; N-(4-nitrophenyl)-(S)-prolinol, N-(4-(2-nitrovinyl)-phenyl)-(S)-prolinol, N-(4-tricyanovinyl-phenyl)-(S)-prolinol, (R)-BINOL, (S)-BINAM and 6-(M)-helicene). The needed electronic frequency dependent cubic response calculations are performed within a density functional theory (DFT) approach. A study of the dependence of the property on the choice of electron correlation, on one-electron basis set extension and on the choice of magnetic gauge origin is carried out on a prototype system (twisted oxygen peroxide). The magnetic gauge dependence analysis is extended also to the molecules of the set. An attempt to analyze the structure-property relationships is also made, based on the results obtained for biphenyl (in a frozen twisted conformation), for prolinol and for some of their derivatives. The strength of the effect is discussed, in order to establish its measurability with a proposed experimental setup.
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Affiliation(s)
- Antonio Rizzo
- Consiglio Nazionale delle Ricerche - CNR, Istituto per i Processi Chimico-Fisici, UoS di Pisa, Area della Ricerca, Via G. Moruzzi 1, I-56124 Pisa, Italy.
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8
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Toyoda S, Abe N, Kimura S, Matsuda YH, Nomura T, Ikeda A, Takeyama S, Arima T. One-Way Transparency of Light in Multiferroic CuB(2)O(4). PHYSICAL REVIEW LETTERS 2015; 115:267207. [PMID: 26765023 DOI: 10.1103/physrevlett.115.267207] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Indexed: 06/05/2023]
Abstract
We experimentally demonstrate one-way transparency of light in multiferroic CuB(2)O(4). The material is rendered transparent for light propagating in one direction, while opaque for light propagating in the opposite direction. The novel transparency results from a destructive interference of the electric dipole and magnetic dipole transitions. The realization of the effect has been accomplished by the application of a high magnetic field and the proper selection of the propagation direction of light in agreement with our quantum mechanical formulation of nonreciprocal directional dichroism.
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Affiliation(s)
- S Toyoda
- Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8561, Japan
| | - N Abe
- Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8561, Japan
| | - S Kimura
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Y H Matsuda
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - T Nomura
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - A Ikeda
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - S Takeyama
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - T Arima
- Department of Advanced Materials Science, University of Tokyo, Kashiwa 277-8561, Japan
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9
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Ratera I, Veciana J. Playing with organic radicals as building blocks for functional molecular materials. Chem Soc Rev 2012; 41:303-49. [DOI: 10.1039/c1cs15165g] [Citation(s) in RCA: 600] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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10
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Katsnelson MI, Lichtenstein AI. Theory of optically forbidden d-d transitions in strongly correlated crystals. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:382201. [PMID: 21386534 DOI: 10.1088/0953-8984/22/38/382201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A general multiband formulation of the linear and nonlinear optical response functions for realistic models of correlated crystals is presented. Dipole-forbidden d-d optical transitions originate from vertex functions, which we consider assuming the locality of an irreducible four-leg vertex. The unified formulation for second- and third-order response functions in terms of the three-leg vertex is suitable for practical calculations in solids. We illustrate the general approach by consideration of intra-atomic spin-flip contributions, with an energy of 2J, where J is a Hund exchange, in the simplest two-orbital model.
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Affiliation(s)
- M I Katsnelson
- Radboud University of Nijmegen, Institute for Molecules and Materials, Heijendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
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11
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McGilp JF. Probing surface and interface structure using optics. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:084018. [PMID: 21389394 DOI: 10.1088/0953-8984/22/8/084018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Optical techniques for probing surface and interface structure are introduced and recent developments in the field are discussed. These techniques offer significant advantages over conventional surface probes: all pressure ranges of gas-condensed matter interfaces are accessible and liquid-liquid, liquid-solid and solid-solid interfaces can be probed, due to the large penetration depth of the optical radiation. Sensitivity and discrimination from the bulk are the two challenges facing optical techniques in probing surface and interface structure. Where instrumental improvements have resulted in enhanced sensitivity, conventional optical techniques can be used to characterize heterogeneous adsorbed layers on a substrate, often with sub-monolayer resolution. Nanoscale lateral resolution is possible using scanning near-field optics. A separate class of techniques, which includes reflection anisotropy spectroscopy, and nonlinear optical probes such as second-harmonic and sum-frequency generation, uses the difference in symmetry between the bulk and the surface or interface to suppress the bulk contribution. A perspective is presented of likely future developments in this rapidly expanding field.
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Affiliation(s)
- J F McGilp
- School of Physics, Trinity College Dublin, Dublin 2, Republic of Ireland
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12
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Arima T, Saito M. Comment on 'Calculated chiral and magneto-electric dichroic signals for copper metaborate (CuB(2)O(4)) in an applied magnetic field'. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:498001. [PMID: 21836208 DOI: 10.1088/0953-8984/21/49/498001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Contrary to a claim by Lovesey and Staub (2009 J. Phys.: Condens. Matter 21 142201), a careful treatment of symmetry shows that the application of a magnetic field along a twofold axis can induce the crystallographic chirality in a tetragonal system with the point group [Formula: see text] like CuB(2)O(4). The chirality is reversed by a 90° rotation of the magnetic field around the c axis.
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Affiliation(s)
- T Arima
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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13
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Kim KW, Gu GD, Homes CC, Noh TW. Bound excitons in Sr2CuO3. PHYSICAL REVIEW LETTERS 2008; 101:177404. [PMID: 18999786 DOI: 10.1103/physrevlett.101.177404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2008] [Indexed: 05/27/2023]
Abstract
We investigated temperature dependent optical spectra of the one-dimensional chain compound Sr2CuO3. The charge transfer transition polarized along the chain direction shows a strongly asymmetric line shape as expected in one-dimensional extended Hubbard model. At low temperature, the charge transfer peak shows a large blueshift and reveals additional sharp peaks at the gap. Even though many spectroscopic studies suggest that this material cannot have a bound exciton based on the one-dimensional extended Hubbard model, we attribute the additional sharp peaks to excitons, which come to exist due to the long-range Coulomb interaction.
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Affiliation(s)
- K W Kim
- Department of Physics, University of Fribourg, Chemin du Muse 3, Fribourg, Switzerland.
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14
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Saito M, Ishikawa K, Taniguchi K, Arima T. Magnetic control of crystal chirality and the existence of a large magneto-optical dichroism effect in CuB2O4. PHYSICAL REVIEW LETTERS 2008; 101:117402. [PMID: 18851331 DOI: 10.1103/physrevlett.101.117402] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2008] [Indexed: 05/26/2023]
Abstract
The possibility of a magnetic field controlling the chirality of matter has been debated for a long time. Here, we report the successful induction of chirality in the noncentrosymmetric canted antiferromagnet, CuB2O4, by application of a low intensity static magnetic field. The chirality is reversed by a 90 degrees rotation of the direction of the magnetic field. The induction of chirality by a magnetic field gives rise to a gigantic enhancement of magnetochiral dichroism in this material. The ability to switch handedness in combination with this large magnetochiral optical effect allows us to design new optical devices such as a magnetically controllable isolator.
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Affiliation(s)
- M Saito
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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15
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Sänger I, Yakovlev DR, Pisarev RV, Pavlov VV, Bayer M, Karczewski G, Wojtowicz T, Kossut J. Spin and orbital quantization of electronic states as origins of second harmonic generation in semiconductors. PHYSICAL REVIEW LETTERS 2006; 96:117211. [PMID: 16605867 DOI: 10.1103/physrevlett.96.117211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2005] [Indexed: 05/08/2023]
Abstract
Basically different mechanisms of optical second harmonic generation (SHG) in semiconductors, induced by an external magnetic field H, have been identified experimentally by studying the diluted magnetic semiconductor (Cd,Mn)Te. For paramagnetic (Cd,Mn)Te the SHG response is governed by spin quantization of electronic states, in contrast with diamagnetic CdTe with its dominating orbital quantization. The mechanisms can be identified by the distinct magnetic field dependence of the SHG intensity which scales with the spin splitting in the paramagnetic case as compared to the H2 dependence observed for the diamagnetic case.
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Affiliation(s)
- I Sänger
- Experimentelle Physik II, Universität Dortmund, 44221 Dortmund, Germany
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16
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Bogani L, Cavigli L, Bernot K, Sessoli R, Gurioli M, Gatteschi D. Evidence of intermolecular π-stacking enhancement of second-harmonic generation in a family of single chain magnets. ACTA ACUST UNITED AC 2006. [DOI: 10.1039/b604985k] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Pavlov VV, Kalashnikova AM, Pisarev RV, Sänger I, Yakovlev DR, Bayer M. Magnetic-field-induced second-harmonic generation in semiconductor GaAs. PHYSICAL REVIEW LETTERS 2005; 94:157404. [PMID: 15904188 DOI: 10.1103/physrevlett.94.157404] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2004] [Indexed: 05/02/2023]
Abstract
We show that application of a magnetic field induces optical second-harmonic generation (SHG) in GaAs. This phenomenon arises from field-induced symmetry breaking causing new optical nonlinearities. A series of narrow SHG lines is observed in the spectral range from 1.52 to 1.77 eV that we attribute to Landau-level quantization of the band energy spectrum. The rotational anisotropy of the SHG signal distinctly differs from that of the electric-dipole approximation. Model calculations reveal that nonlinear magneto-optical spatial dispersion that comes together with the electric-dipole term is the dominant mechanism for this nonlinearity.
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Affiliation(s)
- V V Pavlov
- A. F. Ioffe Physical-Technical Institute, The Russian Academy of Sciences, 194021 St. Petersburg, Russia
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