Physical Review Materials最新文献

{"title":"Strong impact of low-level substitution of Mn by Fe on the magnetoelectric coupling in \u0000<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:mrow><mml:mi>TbMn</mml:mi><mml:msub><mml:mi mathvariant=\"normal\">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>","authors":"A. Maia, R. Vilarinho, P. Proschek, M. Lebeda, M. Mihalik, M. Mihalik, P. Manuel, D. Khalyavin, S. Kamba, J. Agostinho Moreira","doi":"10.1103/physrevmaterials.8.084405","DOIUrl":"https://doi.org/10.1103/physrevmaterials.8.084405","url":null,"abstract":"","PeriodicalId":20545,"journal":{"name":"Physical Review Materials","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141923439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correlation of structural and magnetic properties of \u0000<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:mrow><mml:mi>R</mml:mi><mml:mi>Fe</mml:mi><mml:msub><mml:mi mathvariant=\"normal\">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>\u0000 (\u0000<mml:math xmlns:mml=\"http://www.w3.org","authors":"Banani Biswas, Pavel Naumov, Federico Motti, Patrick Hautle, M. Bartkowiak, Ekaterina V. Pomjakushina, U. Stuhr, Dirk Fuchs, Thomas Lippert, Christof W. Schneider","doi":"10.1103/physrevmaterials.8.084404","DOIUrl":"https://doi.org/10.1103/physrevmaterials.8.084404","url":null,"abstract":"In orthoferrites the rare-earth (R) ion has a big impact on structural and magnetic properties; in particular, the ionic size influences the octahedral tilt and the R3+−Fe3+ interaction modifies properties like the spin reorientation. Growth-induced strain in thin films is another means to modify materials properties since the sign of strain affects the bond length and therefore directly the orbital interaction. Our study focuses on epitaxially grown (010)-oriented DyFeO3 and LuFeO3 thin films, thereby investigating the impact of compressive lattice strain on the magnetically active Dy3+ and magnetically inactive Lu3+ compared to uniaxially strained single-crystal DyFeO3. The DyFeO3 films exhibits a shift of more than 20 K in spin-reorientation temperatures, maintain the antiferromagnetic Γ4 phase of the Fe lattice below the spin reorientation, and show double-step hysteresis loops for both in-plane directions between 5 and 390 K. This is the signature of an Fe-spin-induced ferromagnetic Dy3+ lattice above the Néel temperature of the Dy. The observed shift in the film spin reorientation temperatures vs lattice strain is in good agreement with isostatic single-crystal neutron diffraction experiments with a rate of 2 K/kbar.\u0000 \u0000 \u0000 \u0000 \u0000 Published by the American Physical Society\u0000 2024\u0000 \u0000 \u0000","PeriodicalId":20545,"journal":{"name":"Physical Review Materials","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141922215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced superconductivity in \u0000<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:msub><mml:mi>SrTiO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>\u0000-based interfaces via amorphous \u0000<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:mrow><mml:msub><mml:mi>Al</mml:mi><mml:mn>2<","authors":"I. Silber, A. Azulay, A. Basha, D. Ketchker, M. Baskin, A. Yagoda, L. Kornblum, A. Kohn, Y. Dagan","doi":"10.1103/physrevmaterials.8.084803","DOIUrl":"https://doi.org/10.1103/physrevmaterials.8.084803","url":null,"abstract":"","PeriodicalId":20545,"journal":{"name":"Physical Review Materials","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141928321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantum criticality linked to the suppressed superconducting upper critical field in Ni-doped CeCoIn5","authors":"Azumi Yashiro, Rahmanto, Kaketo Inami, Kohei Suzuki, Kaede Inoh, Teppei Takahashi, Ryosuke Koizumi, Yohei Kono, Shunichiro Kittaka, Yusei Shimizu, Fuminori Honda, Dai Aoki, Kenichi Tenya, Makoto Yokoyama","doi":"10.1103/physrevmaterials.8.l081801","DOIUrl":"https://doi.org/10.1103/physrevmaterials.8.l081801","url":null,"abstract":"We demonstrate a close connection between the quantum critical point (QCP) and superconducting upper critical field <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>H</mi><mrow><mi>c</mi><mn>2</mn></mrow></msub></math> in the Ni-doped heavy-fermion superconductor <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>CeCoIn</mi><mn>5</mn></msub></math>. Temperature variations of electrical resistivity <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>ρ</mi><mo>(</mo><mi>T</mi><mo>)</mo></mrow></math> exhibit a crossover between the non-Fermi liquid and the Fermi liquid states, whose boundary for <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>T</mi><mo>→</mo><mn>0</mn></mrow></math>, regarded as the QCP, coincides with <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>H</mi><mrow><mi>c</mi><mn>2</mn></mrow></msub></math>, while <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>H</mi><mrow><mi>c</mi><mn>2</mn></mrow></msub></math> decreases to zero with increasing Ni concentrations up to 25%. Furthermore, the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>A</mi></math> coefficient of the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msup><mi>T</mi><mn>2</mn></msup></math> term in <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>ρ</mi><mo>(</mo><mi>T</mi><mo>)</mo></mrow></math> estimated in the Fermi liquid region shows the diverging behavior with decreasing the magnetic field <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>H</mi></math> toward <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>H</mi><mrow><mi>c</mi><mn>2</mn></mrow></msub></math>. These experimental results suggest that the emergence of the QCP is always accompanied by the breakdown of the superconducting state by <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>H</mi></math> in Ni-doped <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>CeCoIn</mi><mn>5</mn></msub></math>.","PeriodicalId":20545,"journal":{"name":"Physical Review Materials","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computing the thermal transport coefficient of neutral amorphous polymers using exact vibrational density of states: Comparison with experiments","authors":"Debashish Mukherji","doi":"10.1103/physrevmaterials.8.085601","DOIUrl":"https://doi.org/10.1103/physrevmaterials.8.085601","url":null,"abstract":"Thermal transport coefficient <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>κ</mi></math> is an important property that often dictates broad applications of a polymeric material, while at the same time its computation remains challenging. In particular, classical simulations overestimate the measurements of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>κ</mi></math> in comparison to those of the experiments and thus hinder their meaningful comparison. This is even when very careful simulations are performed using the most accurate empirical potentials. A key reason for such a discrepancy is because polymers have quantum-mechanical, nuclear degrees of freedom whose contribution to the heat balance is nontrivial. In this work, two semianalytical approaches are considered to accurately compute <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>κ</mi></math> by using the exact vibrational density of states <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>g</mi><mo>(</mo><mi>ν</mi><mo>)</mo></mrow></math>. The first approach is based within the framework of the minimum thermal conductivity model, while the second uses computed quantum heat capacity to scale <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>κ</mi></math>. The computed <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>κ</mi></math> of a set of commodity polymers compares quantitatively with <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msup><mi>κ</mi><mi>expt</mi></msup></math>.","PeriodicalId":20545,"journal":{"name":"Physical Review Materials","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cr-Cr distance and magnetism in the phase diagram of triangular lattice antiferromagnets: A systematic comparative study","authors":"E. Nocerino, J. Sugiyama, O. K. Forslund, I. Umegaki, S. Kobayashi, K. Yoshimura, Y. Sassa, M. Månsson","doi":"10.1103/physrevmaterials.8.084403","DOIUrl":"https://doi.org/10.1103/physrevmaterials.8.084403","url":null,"abstract":"In this study, we investigate the influence of Cr-Cr distances on the magnetic properties of triangular lattice antiferromagnets through the lens of the recently synthesized Cr compounds <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>LiCrSe</mi><mn>2</mn></msub></math>, <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>LiCrTe</mi><mn>2</mn></msub></math>, and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>NaCrTe</mi><mn>2</mn></msub></math>. Our comprehensive analysis integrates existing magnetic structure data and new insights from muon spin rotation measurements, revealing a striking mutual influence between strongly correlated electrons and structural degrees of freedom in systems possessing very different magnetic properties despite having the same crystal symmetry. In particular, we delineate how Cr-Cr distances specifically dictate the magnetic behaviors of the triangular lattice antiferromagnets <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>LiCrSe</mi><mn>2</mn></msub></math>, <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>LiCrTe</mi><mn>2</mn></msub></math>, and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>NaCrTe</mi><mn>2</mn></msub></math>. By crafting phase diagrams based on these distances, we establish a clear correlation between the structural parameters and the magnetic ground states of these materials together with a wide variety of trivalent Cr triangular lattice layered magnets. Our analysis uncovers a transition range for in-plane and out-of-plane Cr-Cr distances that demarcates distinct magnetic behaviors, highlighting the nuanced role of lattice geometry in the spin-lattice interaction and electron correlation dynamics.","PeriodicalId":20545,"journal":{"name":"Physical Review Materials","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ferroelectric switching and field effect of Pb(Zr0.7Ti0.3)O3 on Ba1−xLaxSnO3","authors":"Hahoon Lee, Hwanhui Yun, Bongju Kim, Kookrin Char","doi":"10.1103/physrevmaterials.8.084402","DOIUrl":"https://doi.org/10.1103/physrevmaterials.8.084402","url":null,"abstract":"Ferroelectric field-effect transistors offer a potential for its important role in integrated memory and computing systems, and research on them is actively ongoing. In this study, we investigated the ferroelectric properties of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>Pb</mi><mrow><mo>(</mo><mrow><mi mathvariant=\"normal\">Z</mi><msub><mi mathvariant=\"normal\">r</mi><mrow><mn>0.7</mn></mrow></msub><mi mathvariant=\"normal\">T</mi><msub><mi mathvariant=\"normal\">i</mi><mrow><mn>0.3</mn></mrow></msub></mrow><mo>)</mo></mrow><msub><mi mathvariant=\"normal\">O</mi><mn>3</mn></msub></mrow></math>, which is lattice matched with the La-doped high mobility perovskite oxide semiconductor <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi mathvariant=\"normal\">B</mi><msub><mi mathvariant=\"normal\">a</mi><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub><mi mathvariant=\"normal\">L</mi><msub><mi mathvariant=\"normal\">a</mi><mi>x</mi></msub><mi>Sn</mi><msub><mi mathvariant=\"normal\">O</mi><mn>3</mn></msub></mrow></math>. Growth of the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>r</mi></math> phase in epitaxial <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>Pb</mi><mrow><mo>(</mo><mrow><mi mathvariant=\"normal\">Z</mi><msub><mi mathvariant=\"normal\">r</mi><mrow><mn>0.7</mn></mrow></msub><mi mathvariant=\"normal\">T</mi><msub><mi mathvariant=\"normal\">i</mi><mrow><mn>0.3</mn></mrow></msub></mrow><mo>)</mo></mrow><msub><mi mathvariant=\"normal\">O</mi><mn>3</mn></msub></mrow></math> on <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi mathvariant=\"normal\">B</mi><msub><mi mathvariant=\"normal\">a</mi><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub><mi mathvariant=\"normal\">L</mi><msub><mi mathvariant=\"normal\">a</mi><mi>x</mi></msub><mi>Sn</mi><msub><mi mathvariant=\"normal\">O</mi><mn>3</mn></msub></mrow></math> was confirmed and its basic ferroelectric and dielectric properties were studied by polarization-electric and capacitance-voltage measurement. We then studied the field effect of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>Pb</mi><mrow><mo>(</mo><mrow><mi mathvariant=\"normal\">Z</mi><msub><mi mathvariant=\"normal\">r</mi><mrow><mn>0.7</mn></mrow></msub><mi mathvariant=\"normal\">T</mi><msub><mi mathvariant=\"normal\">i</mi><mrow><mn>0.3</mn></mrow></msub></mrow><mo>)</mo></mrow><msub><mi mathvariant=\"normal\">O</mi><mn>3</mn></msub></mrow></math> on the electrical properties of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi mathvariant=\"normal\">B</mi><msub><mi mathvariant=\"normal\">a</mi><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub><mi mathvariant=\"normal\">L</mi><msub><mi mathvariant=\"normal\">a</mi><mi>x</mi></msub><mi>Sn</mi><msub><mi mathvariant=\"normal\">O</mi><mn>3</mn></msub></mrow></math> as we vary the La doping concentration. We find that the field effect of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>Pb</mi><mrow><mo>(</mo><mrow><mi mathvariant=\"normal\">Z</mi><msub><mi mathvari","PeriodicalId":20545,"journal":{"name":"Physical Review Materials","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distinct charge density wave instabilities in PrTen (n=2, 3) and ErTe3 investigated via ARPES and XAS","authors":"J.-S. Kang, Seungho Seong, Eunsook Lee, Y. S. Kwon, Kyoo Kim, Junwon Kim, Heejung Kim, B. I. Min","doi":"10.1103/physrevmaterials.8.080301","DOIUrl":"https://doi.org/10.1103/physrevmaterials.8.080301","url":null,"abstract":"Understanding the origin of distinct charge density wave (CDW) instabilities in layered <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>R</mi><msub><mi>Te</mi><mi>n</mi></msub></mrow></math> (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>n</mi><mo>=</mo><mn>2</mn></mrow></math>, 3) compounds (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>R</mi></math>, rare earth element) has been an important issue. In this research update, we have investigated the electronic structures of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>PrTe</mi><mi>n</mi></msub></math> (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>n</mi><mo>=</mo><mn>2</mn></mrow></math>, 3) and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>ErTe</mi><mn>3</mn></msub></math> layered CDW compounds employing angle-resolved photoemission spectroscopy (ARPES) and soft x-ray absorption spectroscopy (XAS). The trivalent valency of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msup><mi>R</mi><mrow><mn>3</mn><mo>+</mo></mrow></msup></math> ions is confirmed for <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>PrTe</mi><mi>n</mi></msub></math> (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>n</mi><mo>=</mo><mn>2</mn></mrow></math>, 3) and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>ErTe</mi><mn>3</mn></msub></math>, supporting that <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>R</mi></math>-Te slabs serve as charge reservoirs and that the CDW instability occurs in the partially filled Te sheets. Both <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>R</mi><mspace width=\"4pt\"></mspace><mn>4</mn><mi>d</mi><mo>→</mo><mn>4</mn><mi>f</mi></mrow></math> resonant photoemission spectroscopy and photon-energy map measurements provide evidence that <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>R</mi><mspace width=\"4pt\"></mspace><mn>4</mn><mi>f</mi></mrow></math> electrons do not contribute directly to the CDW formation but that the indirect contribution from Pr <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>4</mn><mi>f</mi></mrow></math> electrons through the Pr <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>4</mn><mi>f</mi><mo>−</mo><mi>Te</mi></mrow><mo> </mo><mrow><mn>5</mn><mi>p</mi></mrow></math> hybridization is feasible in <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub><mi>PrTe</mi><mi>n</mi></msub></math> (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>n</mi><mo>=</mo><mn>2</mn></mrow></math>, 3). Circular and linear dichroism ARPES measurements indicate that the chirality of the Te <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>5</mn><mi>p</mi></mrow></math> orbitals certainly plays a role in the CDW formation of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>R</mi><msub><mi>Te</mi><mn>3</mn></msub></mrow></math> (<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>R</mi><mo>=</mo><mi>Pr</mi></m","PeriodicalId":20545,"journal":{"name":"Physical Review Materials","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Length and torsion dependence of thermal conductivity in twisted graphene nanoribbons","authors":"Alexandre F. Fonseca, Luiz Felipe C. Pereira","doi":"10.1103/physrevmaterials.8.084001","DOIUrl":"https://doi.org/10.1103/physrevmaterials.8.084001","url":null,"abstract":"Research on the physical properties of materials at the nanoscale is crucial for the development of breakthrough nanotechnologies. One of the key properties to consider is the ability to conduct heat, i.e., its thermal conductivity. Graphene is a remarkable nanostructure with exceptional physical properties, including one of the highest thermal conductivities (TCs) ever measured. Graphene nanoribbons (GNRs) share most fundamental properties with graphene, with the added benefit of having a controllable electronic bandgap. One method to achieve such control is by twisting the GNR, which can tailor its electronic properties, as well as change their TCs. Here, we revisit the dependence of the TC of twisted GNRs (TGNRs) on the number of applied turns to the GNR by calculating more precise and mathematically well defined geometric parameters related to the TGNR shape, namely, its <i>twist</i> and <i>writhe</i>. We show that the dependence of the TC on <i>twist</i> is not a simple function of the number of turns initially applied to a straight GNR. In fact, we show that the TC of TGNRs requires at least two parameters to be properly described. Our conclusions are supported by atomistic molecular dynamics simulations to obtain the TC of suspended TGNRs prepared under different values of initially applied turns and different sizes of their suspended part. Among possible choices of parameter pairs, we show that TC can be appropriately described by the initial number of turns and the initial twist density of the TGNRs.","PeriodicalId":20545,"journal":{"name":"Physical Review Materials","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dimensional crossover and chirality of boron adsorbates on copper (110) surfaces","authors":"Yuki Tsujikawa, Takeru Nakashima, Xiaoni Zhang, Kazuki Yamaguchi, Masafumi Horio, Masahiro Haze, Yukio Hasegawa, Fumio Komori, Takahiro Kondo, Yasunobu Ando, Iwao Matsuda","doi":"10.1103/physrevmaterials.8.084003","DOIUrl":"https://doi.org/10.1103/physrevmaterials.8.084003","url":null,"abstract":"A copper boride phase found on Cu(110) exhibits dimensional crossover from 1D to 2D structures. The discovered surface phase, <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>7</mn><mo>×</mo><mo>‘</mo><mn>1</mn><mtext>’</mtext><mtext>−</mtext><mi mathvariant=\"normal\">B</mi><mo>/</mo><mi>Cu</mi><mo>(</mo><mn>110</mn><mo>)</mo></mrow></math>, is composed of alternating two-atom and three-atom rows that are separated by trenches. The narrower rows behave as a 1D template for atomic boron chains, and the wider rows provide a new dimensional degree of freedom that facilitates the generation of 2D clusters with chirality. The <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>7</mn><mo>×</mo><mo>‘</mo><mn>1</mn><mtext>’</mtext></mrow></math> phase is nonperiodic in the chain direction and exhibits intermediate boron coverage, between that of the quasiperiodic 1D and periodic 2D phases of copper boride on Cu(110), demonstrating a unique feature of phase transitions at the surface.","PeriodicalId":20545,"journal":{"name":"Physical Review Materials","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}