Nature Physics最新文献_第2页

A spoonful of sugar

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-10 DOI: 10.1038/s41567-024-02710-x

Karen Mudryk

引用次数: 0

A holistic approach to sustainability in research

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-10 DOI: 10.1038/s41567-024-02690-y

Karen Mudryk

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Quantum critical metals and loss of quasiparticles

IF 17.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-09 DOI: 10.1038/s41567-024-02679-7

Haoyu Hu, Lei Chen, Qimiao Si

{"title":"Quantum critical metals and loss of quasiparticles","authors":"Haoyu Hu, Lei Chen, Qimiao Si","doi":"10.1038/s41567-024-02679-7","DOIUrl":"10.1038/s41567-024-02679-7","url":null,"abstract":"Strange metals develop near quantum critical points in a variety of strongly correlated systems. Some of the issues that are central to the field include how the quantum critical state loses quasiparticles, how it drives superconductivity and to what extent the strange-metal physics in different classes of correlated systems are interconnected. In this Review, we survey some of these issues from the vantage point of heavy-fermion metals. We describe the notion of Kondo destruction and how it leads to several crucial effects. These include a transformation of the Fermi surface from large to small when the system is tuned across the quantum critical point, a loss of quasiparticles everywhere on the Fermi surface when it is perched at the quantum critical point and a dynamical Planckian scaling in various physical properties including charge responses. We close with a discussion about the connections between the strange-metal physics in heavy-fermion metals and its counterparts in the cuprates and other correlated materials. The strange-metal state that develops close to a quantum critical point in strongly correlated electron systems is not well understood. This Review summarizes how the notion of Kondo destruction can describe much of the experimental phenomenology.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"20 12","pages":"1863-1873"},"PeriodicalIF":17.6,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Time-domain oscillations between distant spin qubits coupled via virtual photons

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-09 DOI: 10.1038/s41567-024-02706-7

引用次数: 0

Cavity-mediated iSWAP oscillations between distant spins

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-09 DOI: 10.1038/s41567-024-02694-8

Jurgen Dijkema, Xiao Xue, Patrick Harvey-Collard, Maximilian Rimbach-Russ, Sander L. de Snoo, Guoji Zheng, Amir Sammak, Giordano Scappucci, Lieven M. K. Vandersypen

引用次数: 0

Signatures of two gaps in the spin susceptibility of a cuprate superconductor

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-05 DOI: 10.1038/s41567-024-02692-w

Rui Zhou, Igor Vinograd, Michihiro Hirata, Tao Wu, Hadrien Mayaffre, Steffen Krämer, W. N. Hardy, Ruixing Liang, D. A. Bonn, Toshinao Loew, Juan Porras, Bernhard Keimer, Marc-Henri Julien

{"title":"Signatures of two gaps in the spin susceptibility of a cuprate superconductor","authors":"Rui Zhou, Igor Vinograd, Michihiro Hirata, Tao Wu, Hadrien Mayaffre, Steffen Krämer, W. N. Hardy, Ruixing Liang, D. A. Bonn, Toshinao Loew, Juan Porras, Bernhard Keimer, Marc-Henri Julien","doi":"10.1038/s41567-024-02692-w","DOIUrl":"https://doi.org/10.1038/s41567-024-02692-w","url":null,"abstract":"A fundamental obstacle to understanding high-temperature superconducting cuprates is that the occurrence of superconductivity hinders the observation of the normal-state properties at low temperature. One important property illustrating this issue is the spin susceptibility: its decrease upon cooling in the normal state is considered as evidence of pseudogap behaviour. However, unambiguous interpretation of this decrease has been impossible, as the crucial low-temperature data inevitably reflect the superconducting pairing rather than the normal state. Here we measure the spin susceptibility of YBa2Cu3Oy at low temperature while suppressing superconductivity in high magnetic field. We found that there are two thermally activated contributions, each of which comes from a different gap, alongside a residual component due to gapless excitations. We relate these two distinct gaps to short-range charge density waves and to the formation of singlets, as occurs in certain quantum spin systems. Both phenomena contribute to the pseudogap at low temperature, supplementing the short-lived antiferromagnetism that initiates pseudogap behaviour at high temperatures. We, therefore, propose that the pseudogap should be regarded as a composite property and that, when not undergoing spin-stripe ordering, underdoped cuprates tend to form short-range spin singlets.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"53 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142776897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Observation of the Schmid–Bulgadaev dissipative quantum phase transition

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-12-02 DOI: 10.1038/s41567-024-02695-7

Roman Kuzmin, Nitish Mehta, Nicholas Grabon, Raymond A. Mencia, Amir Burshtein, Moshe Goldstein, Vladimir E. Manucharyan

{"title":"Observation of the Schmid–Bulgadaev dissipative quantum phase transition","authors":"Roman Kuzmin, Nitish Mehta, Nicholas Grabon, Raymond A. Mencia, Amir Burshtein, Moshe Goldstein, Vladimir E. Manucharyan","doi":"10.1038/s41567-024-02695-7","DOIUrl":"https://doi.org/10.1038/s41567-024-02695-7","url":null,"abstract":"A classical particle moving in a periodic potential can localize inside a single potential minimum, but a quantum particle forms extended states by tunnelling to neighbouring minima. These two limits are separated by a quantum Schmid–Bulgadaev phase transition driven by a viscous friction force. This physics has implications for Josephson junction devices, which feature superconducting phase dynamics that can be modelled by a fictitious particle in a periodic potential. As a result, it has been anticipated that any junction of two superconductors connected to a resistor can undergo a Schmid–Bulgadaev transition when the value of the resistor exceeds a threshold. Here we observe this transition by implementing the ohmic environment as a massively multimode cavity and probing the effect of the junction on the standing-wave mode spectrum of the cavity. We find that, depending on the characteristic impedance of the cavity, sufficiently weak junctions scatter cavity photons as either inductors or capacitors. These regimes correspond to the superconducting and insulating phases, respectively, and the critical impedance matches the expected value. At the phase boundary, quantum fluctuations boost the junction nonlinearity so that the junction behaves as a resistor. This loss mechanism reconciles the superconducting and insulating phases and provides a possibly useful indication of quantum-critical dynamics.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"37 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Electronic dynamics created at conical intersections and its dephasing in aqueous solution 锥形交叉点产生的电子动力学及其在水溶液中的消相现象

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-11-27 DOI: 10.1038/s41567-024-02703-w

Yi-Ping Chang, Tadas Balciunas, Zhong Yin, Marin Sapunar, Bruno N. C. Tenorio, Alexander C. Paul, Shota Tsuru, Henrik Koch, Jean-Pierre Wolf, Sonia Coriani, Hans Jakob Wörner

{"title":"Electronic dynamics created at conical intersections and its dephasing in aqueous solution","authors":"Yi-Ping Chang, Tadas Balciunas, Zhong Yin, Marin Sapunar, Bruno N. C. Tenorio, Alexander C. Paul, Shota Tsuru, Henrik Koch, Jean-Pierre Wolf, Sonia Coriani, Hans Jakob Wörner","doi":"10.1038/s41567-024-02703-w","DOIUrl":"https://doi.org/10.1038/s41567-024-02703-w","url":null,"abstract":"A dynamical rearrangement in the electronic structure of a molecule can be driven by different phenomena, including nuclear motion, electronic coherence or electron correlation. Recording such electronic dynamics and identifying its fate in an aqueous solution has remained a challenge. Here, we reveal the electronic dynamics induced by electronic relaxation through conical intersections in both isolated and solvated pyrazine molecules using X-ray spectroscopy. We show that the ensuing created dynamics corresponds to a cyclic rearrangement of the electronic structure around the aromatic ring. Furthermore, we found that such electronic dynamics were entirely suppressed when pyrazine was dissolved in water. Our observations confirm that conical intersections can create electronic dynamics that are not directly excited by the pump pulse and that aqueous solvation can dephase them in less than 40 fs. These results have implications for the investigation of electronic dynamics created during light-induced molecular dynamics and shed light on their susceptibility to aqueous solvation.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"12 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142718391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Quantum geometry in solids measured using photo-emitted electrons 使用光发射电子测量固体中的量子几何学

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-11-25 DOI: 10.1038/s41567-024-02681-z

引用次数: 0

Measurements of the quantum geometric tensor in solids 测量固体中的量子几何张量

IF 19.6 1区物理与天体物理

Nature Physics Pub Date : 2024-11-25 DOI: 10.1038/s41567-024-02678-8

Mingu Kang, Sunje Kim, Yuting Qian, Paul M. Neves, Linda Ye, Junseo Jung, Denny Puntel, Federico Mazzola, Shiang Fang, Chris Jozwiak, Aaron Bostwick, Eli Rotenberg, Jun Fuji, Ivana Vobornik, Jae-Hoon Park, Joseph G. Checkelsky, Bohm-Jung Yang, Riccardo Comin

{"title":"Measurements of the quantum geometric tensor in solids","authors":"Mingu Kang, Sunje Kim, Yuting Qian, Paul M. Neves, Linda Ye, Junseo Jung, Denny Puntel, Federico Mazzola, Shiang Fang, Chris Jozwiak, Aaron Bostwick, Eli Rotenberg, Jun Fuji, Ivana Vobornik, Jae-Hoon Park, Joseph G. Checkelsky, Bohm-Jung Yang, Riccardo Comin","doi":"10.1038/s41567-024-02678-8","DOIUrl":"https://doi.org/10.1038/s41567-024-02678-8","url":null,"abstract":"Understanding the geometric properties of quantum states and their implications in fundamental physical phenomena is a core aspect of contemporary physics. The quantum geometric tensor (QGT) is a central physical object in this regard, encoding complete information about the geometry of the quantum state. The imaginary part of the QGT is the well-known Berry curvature, which plays an integral role in the topological magnetoelectric and optoelectronic phenomena. The real part of the QGT is the quantum metric, whose importance has come to prominence recently, giving rise to a new set of quantum geometric phenomena such as anomalous Landau levels, flat band superfluidity, excitonic Lamb shifts and nonlinear Hall effect. Despite the central importance of the QGT, its experimental measurements have been restricted only to artificial two-level systems. Here, we develop a framework to measure the QGT in crystalline solids using polarization-, spin- and angle-resolved photoemission spectroscopy. Using this framework, we demonstrate the effective reconstruction of the QGT in the kagome metal CoSn, which hosts topological flat bands. Establishing this momentum- and energy-resolved spectroscopic probe of the QGT is poised to significantly advance our understanding of quantum geometric responses in a wide range of crystalline systems.","PeriodicalId":19100,"journal":{"name":"Nature Physics","volume":"184 1","pages":""},"PeriodicalIF":19.6,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142696884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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