arXiv: Mesoscale and Nanoscale Physics最新文献_第4页

Moiré edge states in twisted bilayer graphene and their topological relation to quantum pumping 扭曲双层石墨烯的莫尔边态及其与量子泵浦的拓扑关系

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-12-04 DOI: 10.1103/PHYSREVB.103.155410

Manato Fujimoto, M. Koshino

引用次数: 7

Pulsed-gate spectroscopy of single-electron spin states in bilayer graphene quantum dots 双层石墨烯量子点中单电子自旋态的脉冲门光谱

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-12-04 DOI: 10.1103/PHYSREVB.103.L081404

L. Banszerus, K. Hecker, E. Icking, S. Trellenkamp, F. Lentz, D. Neumaier, Kenji Watanabe, T. Taniguchi, C. Volk, C. Stampfer

引用次数: 12

Nongalvanic Calibration and Operation of a Quantum Dot Thermometer 量子点温度计的非电态校准与操作

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-12-02 DOI: 10.1103/PHYSREVAPPLIED.15.034044

J. Chawner, S. Barraud, M. F. Gonzalez-Zalba, S. Holt, Edward Laird, Y. Pashkin, J. Prance

{"title":"Nongalvanic Calibration and Operation of a Quantum Dot Thermometer","authors":"J. Chawner, S. Barraud, M. F. Gonzalez-Zalba, S. Holt, Edward Laird, Y. Pashkin, J. Prance","doi":"10.1103/PHYSREVAPPLIED.15.034044","DOIUrl":"https://doi.org/10.1103/PHYSREVAPPLIED.15.034044","url":null,"abstract":"A cryogenic quantum dot thermometer is calibrated and operated using only a single non-galvanic gate connection. The thermometer is probed with radio-frequency reflectometry and calibrated by fitting a physical model to the phase of the reflected radio-frequency signal taken at temperatures across a small range. Thermometry of the source and drain reservoirs of the dot is then performed by fitting the calibrated physical model to new phase data. The thermometer can operate at the transition between thermally broadened and lifetime broadened regimes, and outside the temperatures used in calibration. Electron thermometry was performed at temperatures between $3.0,mathrm{K}$ and $1.0,mathrm{K}$, in both a $1,mathrm{K}$ cryostat and a dilution refrigerator. The experimental setup allows fast electron temperature readout with a sensitivity of $4.0pm0.3 , mathrm{mK}/sqrt{mathrm{Hz}}$, at Kelvin temperatures. The non-galvanic calibration process gives a readout of physical parameters, such as the quantum dot lever arm. The demodulator used for reflectometry readout is readily available and very affordable.","PeriodicalId":8465,"journal":{"name":"arXiv: Mesoscale and Nanoscale Physics","volume":"119 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81695886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Engineered magnetization and exchange stiffness in direct-write Co–Fe nanoelements 直写Co-Fe纳米元件的工程磁化和交换刚度

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-12-02 DOI: 10.1063/5.0036361

S. Bunyaev, B. Budinská, R. Sachser, Qi Wang, K. Levchenko, Sebastian Knauer, A. Bondarenko, M. Urbánek, K. Y. Guslienko, A. Chumak, Michael Huth, G. Kakazei, O. Dobrovolskiy

{"title":"Engineered magnetization and exchange stiffness in direct-write Co–Fe nanoelements","authors":"S. Bunyaev, B. Budinská, R. Sachser, Qi Wang, K. Levchenko, Sebastian Knauer, A. Bondarenko, M. Urbánek, K. Y. Guslienko, A. Chumak, Michael Huth, G. Kakazei, O. Dobrovolskiy","doi":"10.1063/5.0036361","DOIUrl":"https://doi.org/10.1063/5.0036361","url":null,"abstract":"Media with engineered magnetization are essential building blocks in superconductivity, magnetism and magnon spintronics. However, the established thin-film and lithographic techniques insufficiently suit the realization of planar components with on-demand-tailored magnetization in the lateral dimension. Here, we demonstrate the engineering of the magnetic properties of CoFe-based nanodisks fabricated by the mask-less technique of focused electron beam induced deposition (FEBID). The material composition in the nanodisks is tuned emph{in-situ} via the e-beam waiting time in the FEBID process and their post-growth irradiation with Ga ions. The magnetization $M_s$ and exchange stiffness $A$ of the disks are deduced from perpendicular ferromagnetic resonance measurements. The achieved $M_s$ variation in the broad range from $720$ emu/cm$^3$ to $1430$ emu/cm$^3$ continuously bridges the gap between the $M_s$ values of such widely used magnonic materials as permalloy and CoFeB. The presented approach paves a way towards nanoscale 2D and 3D systems with controllable and space-varied magnetic properties.","PeriodicalId":8465,"journal":{"name":"arXiv: Mesoscale and Nanoscale Physics","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89645840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Universal Length Dependence of Tensile Stress in Nanomechanical String Resonators 纳米弦谐振器中拉应力的普遍长度依赖性

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-12-01 DOI: 10.1103/PHYSREVAPPLIED.15.034063

Maximilian Bückle, Yannick S. Klaß, Felix B. Nägele, R. Braive, E. Weig

引用次数: 6

Non-Bloch band theory in bosonic Bogoliubov–de Gennes systems 玻色子Bogoliubov-de Gennes系统中的非bloch带理论

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-12-01 DOI: 10.1103/PHYSREVB.103.165123

Kazuki Yokomizo, S. Murakami

引用次数: 25

Design of an optomagnonic crystal: Towards optimal magnon-photon mode matching at the microscale 光磁晶体的设计:微尺度下的最佳磁子-光子模式匹配

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-12-01 DOI: 10.1103/PHYSREVRESEARCH.3.013277

J. Graf, Sanchar Sharma, H. Huebl, S. Kusminskiy

引用次数: 6

Nanocontact vortex oscillators based on Co2MnGe pseudo spin valves 基于Co2MnGe伪自旋阀的纳米接触涡振荡器

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-12-01 DOI: 10.1103/PhysRevB.103.224424

J'er'emy L'etang, C. de Melo, C. Guillemard, A. Vecchiola, D. Rontani, S. Petit-Watelot, Myoung-Woo Yoo, T. Devolder, K. Bouzehouane, V. Cros, S. Andrieu, Joo-Von Kim

引用次数: 0

Anomalous Floquet tunneling in uniaxially strained graphene 单轴应变石墨烯中的异常Floquet隧穿

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-12-01 DOI: 10.1103/PhysRevB.103.155433

Y. Betancur-Ocampo, P. Majari, D. Espitia, F. Leyvraz, T. Stegmann

引用次数: 4

Towards a quantum interface between spin waves and paramagnetic spin baths 朝向自旋波和顺磁自旋浴之间的量子界面

arXiv: Mesoscale and Nanoscale Physics Pub Date : 2020-12-01 DOI: 10.1103/PhysRevB.105.075410

C. Gonzalez-Ballestero, T. Sar, O. Romero-Isart

{"title":"Towards a quantum interface between spin waves and paramagnetic spin baths","authors":"C. Gonzalez-Ballestero, T. Sar, O. Romero-Isart","doi":"10.1103/PhysRevB.105.075410","DOIUrl":"https://doi.org/10.1103/PhysRevB.105.075410","url":null,"abstract":"Spin waves have risen as promising candidate information carriers for the next generation of information technologies. Recent experimental demonstrations of their detection using electron spins in diamond pave the way towards studying the back-action of a controllable paramagnetic spin bath on the spin waves. Here, we present a quantum theory describing the interaction between spin waves and paramagnetic spins. As a case study we consider an ensemble of nitrogen-vacancy spins in diamond in the vicinity of an Yttrium-Iron-Garnet thin film. We show how the back-action of the ensemble results in strong and tuneable modifications of the spin-wave spectrum and propagation properties. These modifications include the full suppression of spin-wave propagation and, in a different parameter regime, the enhancement of their propagation length by $sim 50%$. Furthermore, we show how the spin wave thermal fluctuations induce a measurable frequency shift of the paramagnetic spins in the bath. This shift results in a thermal dispersion force that can be measured optically and/or mechanically with a diamond mechanical resonator. In addition, we use our theory to compute the spin wave-mediated interaction between the spins in the bath. We show that all the above effects are measurable by state-of-the-art experiments. Our results provide the theoretical foundation for describing hybrid quantum systems of spin waves and spin baths, and establish the potential of quantum spins as active control, sensing, and interfacing tools for spintronics.","PeriodicalId":8465,"journal":{"name":"arXiv: Mesoscale and Nanoscale Physics","volume":"101 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90667861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7