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Article ; Online: Ambipolar Superconductivity with Strong Pairing Interaction in Monolayer 1T'-MoTe

Tang, Fangdong / Wang, Peipei / Wang, Qixing / Gan, Yuan / Lyu, Jian / Mi, Xinrun / He, Mingquan / Zhang, Liyuan / Smet, Jurgen H

Nano letters

2023 Volume 23, Issue 16, Page(s) 7516–7523

Abstract: Gate tunable two-dimensional (2D) superconductors offer significant advantages in studying superconducting phase transitions. Here, we address superconductivity in exfoliated 1T'- ... ...

Abstract	Gate tunable two-dimensional (2D) superconductors offer significant advantages in studying superconducting phase transitions. Here, we address superconductivity in exfoliated 1T'-MoTe
Language	English
Publishing date	2023-08-04
Publishing country	United States
Document type	Journal Article
ISSN	1530-6992
ISSN (online)	1530-6992
DOI	10.1021/acs.nanolett.3c02033
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Book ; Online: The microscopic origin of the spin-induced linear and quadratic magnetoelectric effects

Pi, Maocai / Xu, Xifan / He, Mingquan / Chai, Yisheng

2021

Abstract: Understanding of the intimate cross-coupling between electric and magnetic degrees of freedom in solids usually requires sophisticated models and time-consuming calculation methods. Instead of macroscopic symmetry analysis, we present a simple but ... ...

Abstract	Understanding of the intimate cross-coupling between electric and magnetic degrees of freedom in solids usually requires sophisticated models and time-consuming calculation methods. Instead of macroscopic symmetry analysis, we present a simple but general approach to explore the microscopic mechanism of magnetoelectric (ME) effects in magnetic ordered materials based on local spin and lattice symmetry analysis. Our methods are successfully applied to Cr$_2$O$_3$ and orthorhombic RMnO$_3$ with linear and quadratic ME effects, respectively. We revealed all the possible microscopic origins of every non-zero ME coefficients that cannot be easily fulfilled by other theoretical methods. Moreover, the contribution from each mechanism can be located down to specific spins or spin pairs. Our theoretical approach is capable of providing a detailed guide to explore rich spin-induced magnetoelectrics with strong ME effects. Comment: 3 figures
Keywords	Condensed Matter - Materials Science ; Condensed Matter - Strongly Correlated Electrons
Subject code	530
Publishing date	2021-10-07
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Enhanced electrochemical performance in an aluminium doped δ-MnO₂ supercapacitor cathode: experimental and theoretical investigations

Wan, Jing / Ji, Peiyuan / Li, Bangxing / Xi, Yi / Gu, Xiao / Huang, Li / He, Mingquan / Hu, Chenguo

Chemical communications. 2022 Jan. 6, v. 58, no. 4

2022

Abstract: One of the biggest challenges faced by the layered manganese oxide MnO₂ used as a supercapacitor cathode is the capacity fading caused by chemo-mechanical degradation and/or structural transformation occurring in the discharging/charging process. Here, ... ...

Abstract	One of the biggest challenges faced by the layered manganese oxide MnO₂ used as a supercapacitor cathode is the capacity fading caused by chemo-mechanical degradation and/or structural transformation occurring in the discharging/charging process. Here, based on systematical experimental measurements and theoretical calculations, we show that both the stability and rate performance of the δ-MnO₂ supercapacitor cathode can be significantly enhanced by Al doping. Compared with pure δ-MnO₂, Al doping (δ-Al₀.₀₆MnO₂) clearly improves the specific capacitance (7% enhancement at 0.1 mA cm⁻²) and cycling stability (12% enhancement after 5000 cycles) simultaneously. These improvements can be attributed to the enhanced electronic transport and formation of more active sites, which are introduced by Al doping. Additionally, our calculations demonstrate that the doped systems (Al atoms located at Mn or O sites) show smaller surface energies than that of pure δ-MnO₂, which hinders side reactions or structure transformations and leads to a better cycling lifetime. Our work gives a comprehensive understanding of the impacts on the performance of δ-MnO₂ introduced by Al doping, and provides a feasible scheme to study the electrochemical mechanism of metal-doped δ-MnO₂.
Keywords	aluminum ; capacitance ; cathodes ; electrochemical capacitors ; electrochemistry ; manganese monoxide
Language	English
Dates of publication	2022-0106
Size	p. 589-592.
Publishing place	The Royal Society of Chemistry
Document type	Article
ZDB-ID	1472881-3
ISSN	1364-548X ; 1359-7345 ; 0009-241X
ISSN (online)	1364-548X
ISSN	1359-7345 ; 0009-241X
DOI	10.1039/d1cc06198d
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Enhanced electrochemical performance in an aluminium doped δ-MnO

Wan, Jing / Ji, Peiyuan / Li, Bangxing / Xi, Yi / Gu, Xiao / Huang, Li / He, Mingquan / Hu, Chenguo

Chemical communications (Cambridge, England)

2022 Volume 58, Issue 4, Page(s) 589–592

Abstract: One of the biggest challenges faced by the layered manganese oxide ... ...

Abstract	One of the biggest challenges faced by the layered manganese oxide MnO
Language	English
Publishing date	2022-01-06
Publishing country	England
Document type	Journal Article
ZDB-ID	1472881-3
ISSN	1364-548X ; 1359-7345 ; 0009-241X
ISSN (online)	1364-548X
ISSN	1359-7345 ; 0009-241X
DOI	10.1039/d1cc06198d
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: First-principles study of vanadium carbides as electrocatalysts for hydrogen and oxygen evolution reactions.

Wan, Jing / Wang, Congcong / Tang, Qian / Gu, Xiao / He, Mingquan

RSC advances

2019 Volume 9, Issue 64, Page(s) 37467–37473

Abstract: Vanadium carbides have attracted much attention as highly active catalysts in both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), while a satisfactory understanding of the underlying mechanisms still remains a challenge. ... ...

Abstract	Vanadium carbides have attracted much attention as highly active catalysts in both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), while a satisfactory understanding of the underlying mechanisms still remains a challenge. Herein we apply first-principles calculations to systematically analyze the crystal structures, electronic properties, free energies during the HER and OER processes, surface energies and crystal formation energies of the three types of vanadium carbides,
Language	English
Publishing date	2019-11-15
Publishing country	England
Document type	Journal Article
ISSN	2046-2069
ISSN (online)	2046-2069
DOI	10.1039/c9ra06539c
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Electronic Nematicity in URu_{2}Si_{2} Revisited.

Wang, Liran / He, Mingquan / Hardy, Frédéric / Aoki, Dai / Willa, Kristin / Flouquet, Jacques / Meingast, Christoph

Physical review letters

2020 Volume 124, Issue 25, Page(s) 257601

Abstract: The nature of the hidden-order (HO) state in URu_{2}Si_{2} remains one of the major unsolved issues in heavy-fermion physics. Recently, torque magnetometry, x-ray diffraction, and elastoresistivity data have suggested that the HO phase transition at T_{ ... ...

Abstract	The nature of the hidden-order (HO) state in URu_{2}Si_{2} remains one of the major unsolved issues in heavy-fermion physics. Recently, torque magnetometry, x-ray diffraction, and elastoresistivity data have suggested that the HO phase transition at T_{HO}≈ 17.5 K is driven by electronic nematic effects. Here, we search for thermodynamic signatures of this purported structural instability using anisotropic thermal expansion, Young's modulus, elastoresistivity, and specific-heat measurements. In contrast to the published results, we find no evidence of a rotational symmetry breaking in any of our data. Interestingly, our elastoresistivity measurements, which are in full agreement with published results, exhibit a Curie-Weiss divergence, which we however attribute to a volume and not to a symmetry-breaking effect. Finally, clear evidence for thermal fluctuations is observed in our heat-capacity data, from which we estimate the HO correlation length.
Language	English
Publishing date	2020-07-08
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.124.257601
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Article ; Online: Two-Dimensional Quantum Hall Effect and Zero Energy State in Few-Layer ZrTe

Tang, Fangdong / Wang, Peipei / He, Mingquan / Isobe, Masahiko / Gu, Genda / Li, Qiang / Zhang, Liyuan / Smet, Jurgen H

Nano letters

2021 Volume 21, Issue 14, Page(s) 5998–6004

Abstract: Topological matter plays a central role in today's condensed matter research. Zirconium pentatelluride ( ... ...

Abstract	Topological matter plays a central role in today's condensed matter research. Zirconium pentatelluride (ZrTe
Language	English
Publishing date	2021-07-12
Publishing country	United States
Document type	Journal Article
ISSN	1530-6992
ISSN (online)	1530-6992
DOI	10.1021/acs.nanolett.1c00958
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Article ; Online: Large Magneto-Transverse and Longitudinal Thermoelectric Effects in the Magnetic Weyl Semimetal TbPtBi.

Wang, Honghui / Zhou, Zizhen / Ying, Jianjun / Xiang, Ziji / Wang, Rui / Wang, Aifeng / Chai, Yisheng / He, Mingquan / Lu, Xu / Han, Guang / Pan, Yu / Wang, Guoyu / Zhou, Xiaoyuan / Chen, Xianhui

Advanced materials (Deerfield Beach, Fla.)

2022 , Page(s) e2206941

Abstract: Magnetic topological semimetals provide new opportunities for power generation and solid-state cooling based on thermoelectric (TE) effect. The interplay between magnetism and nontrivial band topology prompts the magnetic topological semimetals to yield ... ...

Abstract	Magnetic topological semimetals provide new opportunities for power generation and solid-state cooling based on thermoelectric (TE) effect. The interplay between magnetism and nontrivial band topology prompts the magnetic topological semimetals to yield strong transverse TE effect, while the longitudinal TE performance is usually poor. Herein, it is demonstrated that the magnetic Weyl semimetal TbPtBi has high value for both transverse and longitudinal thermopower with large power factor (PF). At 300 K and 13.5 Tesla, the transverse thermopower and PF reach up to 214 µV K
Language	English
Publishing date	2022-10-27
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1474949-X
ISSN	1521-4095 ; 0935-9648
ISSN (online)	1521-4095
ISSN	0935-9648
DOI	10.1002/adma.202206941
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Book ; Online: Electronic nematicity in URu2Si2 revisited

Wang, Liran / He, Mingquan / Hardy, Frederic / Aoki, Dai / Willa, Kristin / Flouquet, Jacques / Meingast, Christoph

2020

Abstract: The nature of the hidden-order (HO) state in URu2Si2 remains one of the major unsolved issues in heavy-fermion physics. Recently, torque magnetometry, x-ray diffraction and elastoresistivity data have suggested that the HO phase transition at THO = 17.5 ... ...

Abstract	The nature of the hidden-order (HO) state in URu2Si2 remains one of the major unsolved issues in heavy-fermion physics. Recently, torque magnetometry, x-ray diffraction and elastoresistivity data have suggested that the HO phase transition at THO = 17.5 K is driven by electronic nematic effects. Here, we search for thermodynamic signatures of this purported structural instability using anisotropic thermal-expansion, Young\'s modulus, elastoresistivity and specific-heat measurements. In contrast to the published results, we find no evidence of a rotational symmetry-breaking in any of our data. Interestingly, our elastoresistivity measurements, which are in full agreement with published results, exhibit a Curie-Weiss divergence, which we however attribute to a volume and not to a symmetry-breaking effect. Finally, clear evidence for thermal fluctuations is observed in our heat-capacity data, from which we estimate the HO correlation length. Comment: 4 Figures, 5 pages
Keywords	Condensed Matter - Strongly Correlated Electrons ; Condensed Matter - Materials Science
Subject code	612
Publishing date	2020-05-03
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Book ; Online: Colossal c-axis response and lack of rotational symmetry breaking within the kagome plane of the CsV$_3$Sb$_5$ superconductor

Frachet, Mehdi / Wang, Liran / Xia, Wei / Guo, Yanfeng / He, Mingquan / Maraytta, Nour / Heid, Rolf / Haghighirad, Amir-Abbas / Merz, Michael / Meingast, Christoph / Hardy, Frederic

2023

Abstract: The kagome materials AV4$_3$Sb$_5$ (A = K, Rb, Cs) host an intriguing interplay between unconventional superconductivity and charge-density-waves. Here, we investigate CsV$_3$Sb$_5$ by combining high-resolution thermal-expansion, heat-capacity and ... ...

Abstract	The kagome materials AV4$_3$Sb$_5$ (A = K, Rb, Cs) host an intriguing interplay between unconventional superconductivity and charge-density-waves. Here, we investigate CsV$_3$Sb$_5$ by combining high-resolution thermal-expansion, heat-capacity and electrical resistance under strain measurements. We directly unveil that the superconducting and charge-ordered states strongly compete, and that this competition is dramatically influenced by tuning the crystallographic c-axis. In addition, we report the absence of additional bulk phase transitions within the charge-ordered state, notably associated with rotational symmetry-breaking within the kagome planes. This suggests that any breaking of the C$_6$ invariance occurs via different stacking of C$_6$-symmetric kagome patterns. Finally, we find that the charge-density-wave phase exhibits an enhanced A$_{1g}$-symmetric elastoresistance coefficient, whose large increase at low temperature is driven by electronic degrees of freedom.
Keywords	Condensed Matter - Superconductivity ; Condensed Matter - Materials Science ; Condensed Matter - Strongly Correlated Electrons
Subject code	539
Publishing date	2023-10-09
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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