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Exact Relations between Running of αs and α in (mathcal{N}{mathbf{ = 1}}) SQCD + SQED (mathcal{N}{mathbf{ = 1}}) SQCD + SQED中αs与α运行的确切关系
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-23 DOI: 10.1134/S0021364025600132
A. L. Kataev, K. V. Stepanyantz
{"title":"Exact Relations between Running of αs and α in (mathcal{N}{mathbf{ = 1}}) SQCD + SQED","authors":"A. L. Kataev,&nbsp;K. V. Stepanyantz","doi":"10.1134/S0021364025600132","DOIUrl":"10.1134/S0021364025600132","url":null,"abstract":"<p>In <span>(mathcal{N} = 1)</span> supersymmetric QCD and QED theory we derive the (all-order) exact equations relating the renormalization group behavior of the strong and electromagnetic couplings and prove that they are valid in the combined higher covariant derivative regularized and minimal subtraction of logarithms renormalized prescription. In particular, the <span>(beta )</span>-function of <span>(mathcal{N} = 1)</span> supersymmetric QCD can be expressed in terms of the Adler <i>D</i>-function. If all flavors have the same absolute value of the electromagnetic charges, it is also possible to write a simple relation between the <span>(beta )</span>-functions for the strong and electromagnetic coupling constants. In this particular case there is a special renormalization group invariant relation.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 5","pages":"315 - 319"},"PeriodicalIF":1.4,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
General Expression for Three-Loop β-Functions of (mathcal{N}{mathbf{ = 1}}) Supersymmetric Theories with Multiple Gauge Couplings Regularized by Higher Covariant Derivatives 高协变导数正则化多规耦合(mathcal{N}{mathbf{ = 1}})超对称理论三环β函数的一般表达式
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-23 DOI: 10.1134/S0021364025600119
O. V. Haneychuk
{"title":"General Expression for Three-Loop β-Functions of (mathcal{N}{mathbf{ = 1}}) Supersymmetric Theories with Multiple Gauge Couplings Regularized by Higher Covariant Derivatives","authors":"O. V. Haneychuk","doi":"10.1134/S0021364025600119","DOIUrl":"10.1134/S0021364025600119","url":null,"abstract":"<p>For <span>(mathcal{N} = )</span> 1 supersymmetric theories with multiple gauge couplings regularized by higher covariant derivatives, a general expression for three-loop gauge <span>(beta )</span>-functions is obtained. For this purpose, using general statements about the validity of the Novikov–Shifman–Vainshtein–Zakharov relations, a result is constructed for the <span>(beta )</span>‑functions defined in terms of the bare couplings. It is demonstrated that in the particular case of the Minimal Supersymmetric Standard Model, it precisely reproduces the known expressions found earlier in another way. For the case where Yukawa couplings are absent, similar expressions for three-loop <span>(beta )</span>-functions are also obtained in terms of the renormalized couplings in an arbitrary subtraction scheme and, in particular, in the <span>(overline {{kern 1pt} {text{DR}}{kern 1pt} } )</span> scheme.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 5","pages":"320 - 323"},"PeriodicalIF":1.4,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143856564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Magnetic Control of the Kinetic Inductance in Elements of Superconducting Electronics 超导电子元件中动态电感的磁控制
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-21 DOI: 10.1134/S0021364024604391
A. A. Neilo, S. V. Bakurskiy, N. V. Klenov, I. I. Soloviev, M. Yu. Kupriyanov
{"title":"Magnetic Control of the Kinetic Inductance in Elements of Superconducting Electronics","authors":"A. A. Neilo,&nbsp;S. V. Bakurskiy,&nbsp;N. V. Klenov,&nbsp;I. I. Soloviev,&nbsp;M. Yu. Kupriyanov","doi":"10.1134/S0021364024604391","DOIUrl":"10.1134/S0021364024604391","url":null,"abstract":"<p>The longitudinal electron transport in a multilayer superconducting structure SF<sub>1</sub>S<sub>1</sub>F<sub>2</sub>sN, where S is a superconductor, F is a ferromagnet, s is a thin superconducting layer, and N is a normal metal, has been theoretically studied. Calculations have shown that the rotation of the magnetization of ferromagnetic layers relative to each other makes it possible to smoothly change the kinetic inductance of the structure by several times. A feature of the electronic state of the structure in the region of system parameters corresponding to its transition from a state with the 0 stable Josephson phase to a state with the π stable phase (0–π transition) has been discovered. This feature leads to the decrease in the singlet component of the pairing amplitude and to an increase in the kinetic inductance of the entire structure. The study of the effect of the finite longitudinal current on the charge transport has shown that the destruction of superconductivity in different layers occurs step-by-step, and the dependence of the kinetic inductance <i>L</i><sub>k</sub> on the total transport current <i>J</i> exhibits several plateaus with an almost constant inductance.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 1","pages":"58 - 66"},"PeriodicalIF":1.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024604391.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of Stability and Structural and Magnetic Ordering in (Cr1 − xFex)3C2 Magnetic MXene （Cr1−xFex）3C2磁性MXene的稳定性及结构和磁性有序研究
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-21 DOI: 10.1134/S0021364024603841
A. S. Shinkorenko, V. S. Zhandun, N. G. Zamkova
{"title":"Study of Stability and Structural and Magnetic Ordering in (Cr1 − xFex)3C2 Magnetic MXene","authors":"A. S. Shinkorenko,&nbsp;V. S. Zhandun,&nbsp;N. G. Zamkova","doi":"10.1134/S0021364024603841","DOIUrl":"10.1134/S0021364024603841","url":null,"abstract":"<p>The thermodynamic stability and the magnetic and electronic properties of a new two-dimensional magnetic compound (Cr<sub>1 −</sub> <sub><i>x</i></sub>Fe<sub><i>x</i></sub>)<sub>3</sub>C<sub>2</sub> belonging to the MXen family have been analyzed using ab initio calculations and the cluster approximation. The most stable structure and magnetic configuration of (Cr<sub>1 −</sub> <sub><i>x</i></sub>Fe<sub><i>x</i></sub>)<sub>3</sub>C<sub>2</sub> have been proposed taking into account the functionalization of the surface with fluorine and oxygen. For the first time, a stable and promising ferrimagnetic MXene (Cr<sub>1/3</sub>Fe<sub>2/3</sub>)<sub>3</sub>C<sub>2</sub> with a high magnetic moment per cell has been discovered, both in the pure form and with the fluorine-functionalized surface.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 1","pages":"41 - 46"},"PeriodicalIF":1.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603841.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Generation of Elliptically Polarized Harmonics by Gas Media in Two-Color Laser Fields under Quasi-Phase Matching Conditions 准相位匹配条件下双色激光场中气体介质产生椭圆偏振谐波
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-21 DOI: 10.1134/S002136402460469X
S. Yu. Stremoukhov
{"title":"Generation of Elliptically Polarized Harmonics by Gas Media in Two-Color Laser Fields under Quasi-Phase Matching Conditions","authors":"S. Yu. Stremoukhov","doi":"10.1134/S002136402460469X","DOIUrl":"10.1134/S002136402460469X","url":null,"abstract":"<p>The effect of the parameters of a medium, which is formed by a set of gas jets, on the generation of elliptically polarized harmonics during nonlinear optical interaction with two-color femtosecond laser fields has been studied. The calculations have been performed for a laser field formed by linearly polarized first and second harmonics of a Cr:forsterite laser with the polarization of the field components making an angle of π/4. The generation of elliptically polarized harmonics by single Ar atoms in such fields has been demonstrated with a nonperturbative theoretical approach. Using the interference model, the efficiency and polarization properties of the generated harmonics under both phase and quasi-phase matching conditions have been calculated. The possibility of quasi-phase amplification of elliptically polarized harmonics has been demonstrated.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 1","pages":"16 - 21"},"PeriodicalIF":1.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Features of the Nonlinear Vibrational Response of Dielectric Media at Two-Wave Mixing 介质在两波混频下的非线性振动响应特征
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-21 DOI: 10.1134/S0021364024604305
M. S. Guselnikov
{"title":"Features of the Nonlinear Vibrational Response of Dielectric Media at Two-Wave Mixing","authors":"M. S. Guselnikov","doi":"10.1134/S0021364024604305","DOIUrl":"10.1134/S0021364024604305","url":null,"abstract":"<p>A relation between the vibrational nonlinear refractive index coefficient <span>({{n}_{2}}(omega ))</span> and the vibrational cubic susceptibility <span>({{chi }^{{(3)}}}(omega ';omega ',omega , - omega ))</span> has been analytically derived involving well-known optical, spectral, and thermal matter parameters. This relation allows one to estimate the nonlinear phase shift of low-power probe radiation at the frequency <span>(omega ')</span>, which propagates in the field of a high-power terahertz pump wave at the frequency <span>(omega )</span>. Theoretical estimates of the nonlinear susceptibility <span>({{chi }^{{(3)}}}(omega ';omega ',omega , - omega ))</span> for water and fused silica for terahertz Kerr effect measurements have been obtained in good agreement with experimental data.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 1","pages":"28 - 34"},"PeriodicalIF":1.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Record High Critical Temperature Among Bismuthides of the 122 Family: BaAg1.8Bi2 with a Monoclinically Distorted CaBe2Ge2 Structure 122家族铋化物中创纪录的高临界温度：BaAg1.8Bi2与单临床扭曲的CaBe2Ge2结构
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-21 DOI: 10.1134/S0021364024604597
A. V. Sadakov, A. S. Usoltsev, V. A. Vlasenko, S. Yu. Gavrilkin, A. I. Shilov, K. S. Pervakov, E. O. Rakhmanov, I. V. Morozov
{"title":"Record High Critical Temperature Among Bismuthides of the 122 Family: BaAg1.8Bi2 with a Monoclinically Distorted CaBe2Ge2 Structure","authors":"A. V. Sadakov,&nbsp;A. S. Usoltsev,&nbsp;V. A. Vlasenko,&nbsp;S. Yu. Gavrilkin,&nbsp;A. I. Shilov,&nbsp;K. S. Pervakov,&nbsp;E. O. Rakhmanov,&nbsp;I. V. Morozov","doi":"10.1134/S0021364024604597","DOIUrl":"10.1134/S0021364024604597","url":null,"abstract":"<p>A new superconductor BaAg<sub>1.8</sub>Bi<sub>2</sub> with a previously unknown variant of the monoclinically distorted CaBe<sub>2</sub>Ge<sub>2</sub> structure (space group <i>C</i>2/<i>m</i>) has been crystallized in the form of single crystals from a bismuth flux. The temperature and magnetic field dependences of the magnetic susceptibility and resistance have shown that this compound transits to a superconducting state at the temperature <i>T</i><sub>c</sub> = 5.4 K. According to the found Ginzburg–Landau parameter κ = 27, this compound is a type-II superconductor with the first and second critical fields <i>H</i><sub>c1</sub>(0) = 53 Oe and <i>H</i><sub>c2</sub>(0) = 2.1 × 10<sup>4</sup> Oe and the critical current density reaching 4.4 kA/cm<sup>2</sup> at 2.5 K. It can be assumed that, similar to some superconducting 112 type bismuthides, superconductivity in this compound is due to the planar square bismuth sublattice contained in the fluorite-like [BiAg<sub>0.8</sub>] layer rather than to the [AgBi] layers where Ag atoms are locally disordered. This could explain the unusually high <i>T</i><sub>c</sub> value for bismuthides belonging to the CaBe<sub>2</sub>Ge<sub>2</sub> structural type and its derivatives.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 1","pages":"72 - 77"},"PeriodicalIF":1.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024604597.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143466023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Metamorphic InAs/InGaAs Quantum Dot Heterostructures for Single-Photon Generation in the C-Band Spectral Range c波段单光子产生的InAs/InGaAs量子点异质结构
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-21 DOI: 10.1134/S0021364024604743
S. V. Sorokin, G. V. Klimko, I. V. Sedova, O. E. Lakuntsova, A. I. Galimov, Yu. M. Serov, A. I. Veretennikov, L. A. Snigirev, A. A. Toropov
{"title":"Metamorphic InAs/InGaAs Quantum Dot Heterostructures for Single-Photon Generation in the C-Band Spectral Range","authors":"S. V. Sorokin,&nbsp;G. V. Klimko,&nbsp;I. V. Sedova,&nbsp;O. E. Lakuntsova,&nbsp;A. I. Galimov,&nbsp;Yu. M. Serov,&nbsp;A. I. Veretennikov,&nbsp;L. A. Snigirev,&nbsp;A. A. Toropov","doi":"10.1134/S0021364024604743","DOIUrl":"10.1134/S0021364024604743","url":null,"abstract":"<p>Heterostructures with InAs/InGaAs quantum dots and In<sub><i>x</i></sub>Ga<sub>1–<i>x</i></sub>As/GaAs(001) metamorphic buffer layers are grown by molecular-beam epitaxy. The structures are designed to obtain single-photon emission in the telecommunication C-band wavelength range. The possibility of reducing the thickness of the In<sub><i>x</i></sub>Ga<sub>1–<i>x</i></sub>As graded layer in order to form efficient microcavity structures with a cavity length as small as two wavelengths is examined. The structures with metamorphic buffer layers grown on top of an Al<sub>0.9</sub>Ga<sub>0.1</sub>As/GaAs distributed Bragg reflector are grown and characterized by cross-sectional transmission electron microscopy and photoluminescence spectroscopy.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 1","pages":"35 - 40"},"PeriodicalIF":1.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024604743.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ultraviolet Cathodoluminescence of Ion-Induced Defects in Hexagonal Boron Nitride 六方氮化硼离子诱导缺陷的紫外阴极发光
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-21 DOI: 10.1134/S0021364024603531
O. A. Gogina, Yu. V. Petrov, O. F. Vyvenko, S. Kovalchuk, K. Bolotin
{"title":"Ultraviolet Cathodoluminescence of Ion-Induced Defects in Hexagonal Boron Nitride","authors":"O. A. Gogina,&nbsp;Yu. V. Petrov,&nbsp;O. F. Vyvenko,&nbsp;S. Kovalchuk,&nbsp;K. Bolotin","doi":"10.1134/S0021364024603531","DOIUrl":"10.1134/S0021364024603531","url":null,"abstract":"<p>Hexagonal boron nitride is distinguished among solid-state materials with luminescent properties as a material to create single-photon sources efficiently emitting at room temperature. In this work, it is demonstrated that helium ion irradiation with fluences of (1–5) × 10<sup>14</sup> ion/cm<sup>2</sup> increases the ultraviolet radiation intensity with a maximum at a wavelength of 320 nm due to the formation of new luminescent centers. The subsequent electron irradiation further increases the intensity of 320 nm luminescence apparently due to the formation of carbon-containing defects in the volume of <i>h</i>BN through recombination-enhanced migration. On the contrary, the intense helium ion irradiation stimulates the formation of nonradiative recombination centers, which reduce the lifetime of nonequilibrium charge carriers.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 1","pages":"1 - 7"},"PeriodicalIF":1.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603531.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Magneto-Electric Spin Resonance of 63Cu2+ Dimer Associates in a BaF2 Single Crystal BaF2单晶中63Cu2+二聚体的磁电自旋共振
IF 1.4 4区 物理与天体物理
JETP Letters Pub Date : 2025-02-21 DOI: 10.1134/S0021364024604214
R. B. Zaripov, V. F. Tarasov, V. A. Ulanov
{"title":"Magneto-Electric Spin Resonance of 63Cu2+ Dimer Associates in a BaF2 Single Crystal","authors":"R. B. Zaripov,&nbsp;V. F. Tarasov,&nbsp;V. A. Ulanov","doi":"10.1134/S0021364024604214","DOIUrl":"10.1134/S0021364024604214","url":null,"abstract":"<p>Unusual resonance lines have been observed for a dimer associate of impurity <sup>63</sup>Cu<sup>2+</sup> ions in a BaF<sub>2</sub> single crystal in continuous-wave electron paramagnetic resonance spectra recorded using a dielectric resonator. The phase of these lines is orthogonal to the phase of magnetic field modulation. The appearance of such lines is attributed to the features of the spin dynamics of high-spin electron systems resonantly interacting with a microwave electromagnetic field. The magnetic dipole moment of the spin system is transformed into the electric quadrupole moment under the sufficiently intense resonant excitation of magnetic dipole transitions. In this case, the interaction of the magnetic dipole and electric quadrupole oscillators occurs in the spin system. The simultaneous excitation of magnetic dipole and electric quadrupole resonant transitions in the dielectric resonator of a spectrometer leads to the appearance of phase-shifted resonance lines.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"121 1","pages":"47 - 52"},"PeriodicalIF":1.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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